Yoshitake Nishi

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• PhD (Engineering. Materials Sci.: Tohoku U.)
• Prof. Emeritus at Tokai University

Polycarbonate (PC) is a highly recyclable thermoplastic with high impact strength that bodes well to re-melting extrusion and shredding for positive environmental impact. For the goal of improving impact strength further, layered carbon fiber (CF) reinforcement has been added between PC sheets by hot pressing at 6.0 MPa and 537 K for 8 min. An addi...

It is a serious problem that short carbon fiber reinforced polyamide 66 (SCFRPA66) cannot be easily shaped by 3D-printing for practical usages. In order to improve on the brittleness, homogeneous low potential electron beam irradiation (HLEBI) to both sides of 3D-SCFRPA66 samples was found to increase strain at tensile strength (εts), corresponding...

In short-carbon-fiber-reinforced polyamide 66 articles shaped by 3D printing (3D-SCFRPA66), the interfaces between printed layers are often susceptible to damage, and the composite is excessively brittle. Therefore, a novel treatment for 3D-printed short-carbon-fiber-reinforced polyamide (3D-SCFRPA66) using homogeneous low-potential electron beam i...

Recently, application of inorganic nano-periodic structure become an active area of research. Polysilsesquioxane (PSQ) is known as hydrolytically stable organic-inorganic hybrid material and this study propose a room temperature (RT) nanoimprint using methylated poly silsesquioxane (Me-PSQ) dissolved in high-boiling solvent. PSQ electron beam cross...

It is vital to maximize the safety of outdoor constructions, airplanes, and space vehicles by protecting against the impact of airborne debris from increasing winds due to climate change, or from bird strikes or micrometeoroids. In a widely-used compression-molded short glass fiber polyester bulk-molded compound (SGFRP-BMC) with 55% wt. CaCO 3 fill...

Since 1998, our target of the projects has been the international active collaborations for Research for constructed and smart materials with original concepts. Excellent achievements were getting PhD (INSA Lyon) of master (Tokai U.) M. Kanda as well as more than 30 papers worked with three Research Unites in France.

As part of the international effort to deal with climate change, the renewable energy sources needed by society will fluctuate over time and season. Meanwhile, there is a demand for a stable supply on the consumption side. Hydrogen is therefore attracting attention as a low environment load energy carrier to bridge the gap between them. A technical...

Carbon fiber reinforced thermoset (TS) plastics (CFRP) are widely used as structural materials. However, TS CFRP requires a long curing time, resulting in poor productivity. To reduce the production time for composite fabrication, the use of thermoplastic polycarbonate as a base material, which can be molded by hot pressing, has been considered. Th...

Localised Surface Plasmon Resonance (LSPR) is being considered for use in biosensors and colour filters, etc. Al is a promising material for LSPR because it can be used in the visible range. Room-temperature (RT) nanoimprinting using polysilsesquioxane (PSQ) has been proposed as a method for forming chlorine-based dry-etching masks for Al thin film...

New types of hybrid aluminum joints: Al/acrylonitrile butadiene styrene (ABS) carbon fiber reinforced thermoplastic polymers (CFRTP) designated Al/Ni-CFP/ABS, and Al/Stainless steel (18-8), (Al/Ni-CFP/18-8), by Ni-plated carbon fiber plug (Ni-CFP) insert not before seen in the literature have been fabricated. The goal is to take advantage of extrem...

In an interlayered carbon fiber-reinforced polycarbonate polymer (CFRPC) composite composed of three sized of CF plies, alternating between four PC sheets, designated [PC]4[CF]3, and a new process of activating CF cross-weave cloth plies directly on both sides with homogeneous low-energy electron beam irradiation (HLEBI) before lamination assembly...

A literature review of up-to-date methods to strengthen Ti/carbon-fiber-reinforced polymer (CFRP) hybrid joints is given. However, there are little or no studies on Ti/CFRP joints by carbon fiber plug insert, which takes advantage of the extremely high surface adhesion area of ~6 μm CFs. Therefore, we cover the current status and review our previou...

New types of hybrid aluminum joints: Al-acrylonitrile butadiene styrene (ABS) carbon fiber reinforced thermoplastic polymer (CFRTP) designated Al/Ni-CFP/ABS, and Al-18-8 Stainless steel, Al/Ni-CFP/18-8, by Ni-plated carbon fiber plug (Ni-CFP) insert not before seen in the literature have been fabricated. The goal is to take advantage of extremely h...

Achieving a strong bond between carbon fiber (CF) and recyclable thermoplastic polymer (TP) has always been highly sought after. So far, applying electron beam (EB) irradiation with optimal dose and cathode potential (Vc) has shown success in increasing mechanical properties of interlayered CFRTPs. However, with concern for durability and safety, h...

As the hydrogen society progresses, Fuel Cell Vehicles (FCVs) are rapidly becoming more widespread. Metal hydrogen permeable membranes, which are the essential parts of the hydrogen fuels for polymer electrolyte fuel cells (PEFCs), require an alternative material to palladium from a cost point of view. Austenitic stainless steel, which is low cost,...

Achieving a strong bond between carbon fiber (CF) and recyclable thermoplastic polymer (TP) has always been highly sought after. So far, applying electron beam (EB) irradiation with optimal dose and cathode potential (Vc) has shown success in increasing mechanical properties of interlayered CFRTPs. However, with concern for durability and safety, h...

Impact by hailstone, volcanic rock, bird strike, or also dropping tools can cause damage to aircraft materials. For maximum safety, the goal is to increase Charpy impact strength (auc) of a carbon-fiber-reinforced thermoplastic polyphenylene sulfide polymer (CFRTP-PPS) composite for potential application to commercial aircraft parts. The layup was...

Carbon fiber reinforced epoxy plastics (CFRP) is widely utilized for light weighted aerospace structural materials. However, CFRP require a long curing time of epoxy plastics to make composites. To shorten the molding time, the thermoplastics of polycarbonate instead of epoxy resin was applied to make composite of carbon fiber reinforced thermoplas...

Strong adhesion between recyclable thermoplastic (TP) polymer and carbon fiber (CF) has always been highly sought after. Therefore, for an interlayered CF reinforced TP polypropylene (CFRTPP) composite composed of 3 sized CF plies, alternating between 4 PP sheets, designated [PP]4[CF]3, a process of activating CF plies directly on both sides with h...

A literature review of up-to-date methods to strengthen Ti/carbon-fiber-reinforced polymer (CFRP) hybrid joints is given. However, there are little or no studies on Ti/CFRP joints by carbon fiber plug insert, which takes advantage of the extremely high surface adhesion area of ~6 μm CFs. Therefore, we cover the current status and review our previou...

Bird strike, volcanic rock, hailstones, micrometeoroids, or space debris can cause damage to aircraft and space vehicles, therefore their composite materials must have high impact resistance to maximize safety. In a 55% wt. CaCO3 compression molded short glass fiber polyester GFRP-BMC (bulk molded compound), shortening the nominal 6.4 mm fiber leng...

A new process of activating sizing film free (removed sizing) carbon fiber (SFF-CF) mats directly with electron beam irradiation (EBI) under oxygen-rich nitrogen gas prior to lamination assembly and hot-press was found to increase bending strength of CFRTP (CF reinforced thermoplastic polypropylene (PP)) interlayered composite composed of 3 SFF-CF...

In a layered carbon fiber reinforced thermoplastic polymer (CFRTP) composite composed of 3 cross-weave carbon fiber (CF) cloth sheets between 4 polypropylene (PP) mats, [PP]4[CF]3 (55 vol%-CFs), effects of: (1) factory provided sized CF (sizing film (SF) coated CFs with nano-scale rough surface after anodic oxidization), and (2) electron beam irrad...

A novel joint of 18-8 stainless steel and aluminum (Al) connected by a 20 © 10 © 0.3mm nickel (Ni)-coated carbon fiber (CF) crossweave cloth junction utilizing extremely large friction force by broad interface of 6 μm diameter CF has been successfully developed for potential aerospace application. This was done by a partial welding process of the C...

Diarrhea remains the leading cause of morbidity and mortality in beef calves. Calf diarrhea is problematic because it reduces productivity at the production site. In the healthy state, the intestinal villi absorb water and glucose, but when the intestinal epithelium is impaired diarrhea develops, and damage to intestinal villi reduces productivity....

Inflammatory diseases caused by lipopolysaccharide (LPS) are the most frequently observed diseases in dairy and feedlot cows. The acute-phase response to LPS may regulate transcription factors and the release of pro-inflammatory cytokines, including IL-6 and hepcidin. Iron is known to play roles in many enzymatic activities, and is an essential tra...

Serum amyloid A (SAA) is an acute phase protein that increases in concentration in the serum in the early stages of inflammation. SAA is used to diagnose inflammatory diseases in humans, cats, and horses. Such an inflammatory marker to diagnose inflammatory diseases needs to be investigated in cattle. Furthermore, the relationship between systemic...

A new method of linear connected joints (Ti/CF-plug/Epoxy) of Ti (Titanium) to Epoxy connected by CF-plug was innovated and developed, since fine carbon fibers (CFs) generate the extremely large friction force by their broad interface between metals and Epoxy polymer (M/Epoxy). Compared with glue and spontaneous adhesions of M/Glue/Epoxy and M/Epox...

A new process of internal activation of carbon fiber reinforced thermoplastic polymer (CFRTP) of polypropylene (PP) by applying electron beam irradiation (EBI) under oxygen (O2)–rich nitrogen gas (N2) atmosphere to CF chopped strand matt (CSM) layers prior to assembly and hot press to strengthen the typically weak CF/thermoplastic polymers (TPs) ad...

A new method to fabricate linear connected joints of Ti (titanium) to Epoxy polymer connected by CF-plug designated here as [Ti/CFW-CFRP] was innovated to enhance safety level of airplanes, since fine carbon fibers (CFs, 6-7/1000 mm) generate extremely large friction force by their broad interface between Ti and Epoxy [Ti/Epoxy] giving strong adhes...

Diarrhea remains the leading cause of mortality in dairy calves, and a common cause of morbidity and mortality in beef calves. Calf diarrhea is problematic because it reduces productivity at the production site. In the healthy state, the intestinal villi absorb water and glucose, but when the intestinal epithelium is impaired by Escherichia coli or...

Macrolide antibiotics have not only bacteriostatic effects, but also anti-inflammatory effects via the inhibition of cytokine release. The 15-membered ring macrolide tulathromycin is widely used for cattle with inflammatory pneumonia. However, its anti-inflammatory activity, especially against endotoxin, remains unclear. The purpose of this study w...

Inflammatory diseases, such as bovine respiratory disease complex (BRD), are the most frequently observed diseases in dairy and feedlot cows, and most common cause of economic loss. Calves are highly sensitive to the component of the gram-negative bacterial envelope known as LPS or endotoxin. The acute-phase response to endotoxin may regulate trans...

In a highly CaCO3 filled compression molded short glass fiber polyester GFRP-BMC composite with high solidification texture angle of 71 ± ∼7 deg with respect to specimen length, Charpy impact strength, auc at both low −79°C (194 K) and high 70°C (343 K) temperatures were apparently increased 69 and 32%, respectively over that at RT (293 K). This re...

Applying low-potential electron beam irradiation (EBI) dose of 0.13 MGy to polycarbonate (PC) sheet on both side surfaces apparently improved the impact value (auc) over the untreated samples at all accumulative probabilities of fracture (Pf). Based on 3-parameter Weibull equation, the 0.13 MGy-EBI also raised the lowest limit of auc (25.5 kJ m⁻²)...

Interconnection of Polymers to Ti by Using CF-Plug

Tensile strength at each accumulative probability of strength (Pf) was obtained for 28mass% carbon fibers (CF) reinforced thermoplastic polypropylene (PP) with and without sizing epoxy film on the fibers prior to making composites (CFRTP) of three cross CF cloth sheets and four PP matts, layer by layer. The sizing film covered on CF apparently impr...

The homogeneous and quick treatment of 100 keV class electron beam irradiation (EBI) improved the resistance to impact fatigue indicated by the critical collision number (Nc) of impact fracture of PZT (Pb(Nb2/3Ni1/3)O3-Pb(Zr1/3Ti2/3)O3) ceramics, although an additional dose decayed them. An optimal dose of 0.086 MGy-EBI apparently improved the Nc a...

A unimorph 2-layer (PU:LaNi5/Ti) actuator consisting of a driving composite sheet with large expansion of polyurethane (PU) dispersed with powder mixture of hydrogen storage alloy of 35 vol%-LaNi5 and Pd-Al2O3 catalyst prepared by solution cast method, and a 5 μm thick Ti sheet exhibited reversible and giant rapid bending motion when subjected to h...

A new titanium (Ti)/polycarbonate (PC) joint [Ti/EBCF/PC] internally connected by homogeneous low potential electron beam irradiation (HLEBI) activated cross-weave carbon fiber (6 μm in diameter) cloth insert taking advantage of broad CF surface area had been developed. Applying HLEBI dose in the range of 0.043 to 0.43 MGy to the bare CF half-lengt...

Neonatal diarrhea leads to overall loss of not only electrolytes and water, but also decreases carbohydrates, lipids, and amino acids in calves. The mean fecal fat content was higher in calves with diarrhea than in healthy calves, and the mean caloric intake from milk was decreased by 31% in diarrheic calves compared with that in healthy calves. Th...

Neonatal calf diarrhea, which mainly affects animals before weaning, is easy to diagnose and is characterized by frequent passing of soft feces (less than 10% dry content). Long-term utilization of broad-spectrum antibiotic therapy is being followed in order to control these infections. The use of probiotics for diarrhea treatment may have value as...

Ultra-high-molecular-weight polyethylene (UHMWPE) is used as a bearing material in total joint prostheses. One of the criterion that determines the strength of medical UHMWPE is its tensile properties. However, its compressive properties, which play an important role in determining the durability of the contact surfaces of prostheses, have not yet...

2-layer laminated sheets (PE/PET) with Polyethylene (PE) and Polyethylene Terephthalate (PET) were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (≦1.30 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 5 MPa and 403 K. Although the weak hot-press adhesion of the PE/PE...

The in-plane and cross-plane transport properties of nanocrystalline bismuth telluride (Bi2Te3) thin films were evaluated to analyze their anisotropic behavior. Bi2Te3 thin films were prepared via radio frequency (RF) magnetron sputtering, followed by a subsequent treatment of thermal annealing and homogeneous electron beam (EB) irradiation at vari...

A 2-layer Titanium/polycarbonate (Ti/PC) laminated sheet treated by homogeneous low energy electron beam irradiation (HLEBI) to only the PC side prior to assembly and hot press at 438 K for 3.0 min under 20 MPa without the use of fasteners, rivets or glue was investigated. Experimental results showed the 0.30 MGy HLEBI dose appeared to be at or nea...

Experimental viscosity measurements (50 to 100 Pas at mold walls, T = 273 to 373 K) of an injection-molded highly-filled glass fiber reinforced polyester bulk molding compound (GFRP-BMC) whose fiber length (lfiber = 0.44 mm) was optimized for tensile mechanical strength agreed well with that previously calculated by Navier-Stokes equation from fibe...

Adhesion induced by homogeneous low voltage EB-irradiation (HLEBI) under O2 partial pressure from 0.02 mol% to 20 mol% in N2 gas atmosphere of CFRP/Al lamination has been successfully developed. Its adhesive tensile shear strength of CFRP/Al with 0.30 MGy-HLEBI under optimal O2 partial pressure in N2 atmospher of 0.2 mol% is 8.2 MPa, which is about...

A joint between the carbon fibers (CF) reinforced thermoplastic polycarbonate and titanium (Ti) with extremely large friction force induced by the broad fiber interface was successfully prepared by using both electron beam melting process to wrap one side of the CF into the Ti and hot-press under air to wrap the other side of CF into polycarbonate...

An optimal condition to improve the adhesion of PTFE/PE lamination of Polytetrafluoroethylene (PTFE) untreated and Polyethylene (PE) activated by homogeneous low voltage electron beam irradiation (HLEBI) under each O2 partial pressure in N2 gas atmosphere prior to hot-press was studied. Its adhesive force of PTFE/PE with 0.22 MGy-HLEBI under optimal...

Two layer Fluororesin/PU laminated sheets of fluororesin and polyurethane (PU) were prepared by a double-step treatment consisting of applying low dose ≤0.65 MGy homogeneous low energy electron beam irradiation (HLEBI) to the 2-layer assembly where the HLEBI penetrates through the fluororesin and PU layers, respectively, prior to hot-press under 5...

We propose a new method of applying homogeneous low potential electron beam irradiation (HLEBI) externally to both sides of glass fiber (GF) chopped strand mat (GF-CSM) reinforced thermoplastic polypropylene (PP) interlayered samples (CSM-GFRTP) after lamination assembly and hot press with layup of [PP]6[GF-CSM]5. The external process apparently im...

Homogeneous electron beam irradiation (HLEBI) induces formations of active terminated atoms with dangling bonds. Activations are induced by both charging with short life and formation of dangling bonds with long life, resulting in improving electronic conductivity of insulators and mist-resistance of endoscope lens and dentist mirror. HLEBI general...

EB-Strengthening Methods of ERTPs Composites Inside--Fiber reinforced thermoplastic polymers (FRTPs), already applied for automobile bumper and IC (integrated circuit) substrate, can be easily produced with high productivity for mass production by various forming process. However, it is serious problem of the low strength of FRTPs because of high v...

Influences of homogeneous low potential electron beam irradiation (HLEBI) on the fracture resistance for ceramics were studied. Optimal dose of HLEBI, which was one of short-time treatments of dry process at near room temperature, increased fracture resistance for ceramics. HLEBI generated not only vacant sites with dangling bonds in PZT crystallin...

The conventional joint methods of welding, blazing, rivet connecting and glue often reduce the strength of light metals and polymers. Since fine carbon fibers (CF: 6 µm-diameter) induce the extremely large friction force by their broad interface in matrix, a new method of CF cloth reinforced universal joint (CFR-UJ) has been suggested. When the CFR...

Aluminum (Al), titanium (Ti) and polycarbonate (PC) are light materials utilized for dream worthy transport vehicles. Although both Al and Ti are active metals, they exhibit good corrosion resistance due to formation of strong thin passive films on their surface. In addition, Al exhibits the radiation shielding except heating and high electric cond...

Introduction Glass and carbon fiber reinforced thermoplastic polymers (GFRTPs and CFRTPs) are cutting-edge strong, lightweight materials that are widely used in numerous daily articles and prime mover machines. Although thermoplastics have the advantages of having higher crack resistance, easier formability, and can be more easily recycled than the...

Evaluation of the Tensile Strength of Electron Beam Irradiated Powdered Ultra High Molecular Weight-Polyethylene Prior to Sintering [1] The variation in tensile strength (σb), fracture strain (εf) and Young modulus (dσ/dε) of low voltage electron beam irradiation (HLEBI) on powdered ultra-high molecular weight-polyethylene from 0.043 to 0.43 MGy p...

A 2-layer aluminum/polycarbonate (Al/PC) joint was fabricated between half specimens of typically difficult to adhere Al and PC without use of welding, fasteners, rivets, chemical treatment or glue by a new double-step adhesion method: applying a low dose of homogeneous low energy electron beam irradiation (HLEBI) to only the PC connecting surface,...

Coliform mastitis caused by Escherichia coli and/ or Klebsiella pneumoniae is typically associated with clinical and acute mastitis, which is one of the most frequent causes of culling. Acute coliform mastitis (ACM) shows local and systemic inflammation and is generally recognized as the cause of fatality. Serum iron concentration has been evaluate...

Neonatal diarrhea remains the most common cause of death in beef and dairy calves. Intravenous (IV) fluid therapy is an important method for decreasing mortality associated with diarrhea in calves. Although Acetated Ringer's (AR) solution is superior for correcting moderate metabolic acidosis and circulation volume in calves with dehydration, it ca...

Glass fiber reinforced polymer bulk molding compounds (GFRP-BMCs) are composites that have wide application in aerospace, automotive parts, housing for electrical wiring, and corrosion resistant needs. They have excellent flow characteristics that make them well suited for injection molded parts requiring precise dimensions and detail hence differe...

Strengthening carbon and glass fibers reinforced polymers (FRPs) were recently developed by using pre-stress [1-3] and electron beam irradiation [4-10]. Optimal conditions were mainly caused by strengthening polymers matrix and/or fibers, as well as resistance to pull-out by adhesion and/or compressive stress at interface. Firstly, Since the pre-st...

Introduction Both titanium (Ti) and carbon fiber reinforced thermoplastic polymers (CFRTP) are typical light structural materials not only to save energy for the environment, but also to enhance the mobility of aircraft. They have been already utilized for dream worthy mover machines, as well as airplanes and automobiles. Although the four joint me...

Adhesive 2-layer lamination plies (Metal/CFRP) of metals (18-8, Al and Cu) and carbon fiber reinforced epoxy polymer (CFRP) were prepared using a new adhesion method consisting of applying low dose of less than 0.3 MGy of homogeneous low energy electron beam irradiation (HLEBI) to connecting surfaces of the metals and CFRP prior to assembly and hot...

A new method with extremely large friction force taking advantage of the high interface area of carbon fiber (CF: 6 µm-diameter) cross weave cloth, surface activated by homogeneous low voltage electron beam irradiation (HLEBI) on the ABS half-length prior to dipping in ABS resin to enhance the ability of difficult to adhere thermoplastic with CF ha...

The effects of homogeneous electron beam irradiation (EBI) at room temperature on the adhesive force of peeling at each peeling probability (Pp) of laminated sheets of bio-adaptable polydimethylsiloxane (PDMS) with great formability property and chemical resistance polymethyl methacrylate (PMMA) with sterilization were investigated without glue. EB...

2-layer laminated sheets (PP/PA6) with polypropylene (PP) and nylon 6(PA6) were prepared by applying low dose homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 10 MPa, 403 K and 3 min. Although the adhesion of the PP/PA6 was often observed with a weak hot-press without HLEBI, the HLEBI (≦1.29 MGy) induced adhesion ra...

Homogeneous low energy electron beam irradiation (HLEBI) to surface mostly improved the bending elastic modulus (b(dσ/dε)i) and tensile stiffnesst (t(dσ/dε)i) of composites sheets of glass fiber reinforced thermoplastic polypropylene (GFRTP). Although increasing dose of HLEBI decayed the ductility, optimal dosage of HLEBI from 0.22 to 0.86 MGy ofte...

2-layer laminated sheets (PU/PET) with Polyurethane (PU) and Polyethylene Terephthalate (PET) were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (≦ 1.72 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 3 MPa and 348 K. Although the weak hot-press adhesion of the PU/P...

Adhesive 2-layer lamination joints of 18mass%Cr-8mass%Ni austenite stainless steel and carbon fiber reinforced polymer (18-8/CFRP) were prepared using a new adhesion method consisting of applying low dose of 0.13 MGy of homogeneous low energy electron beam irradiation (HLEBI) to connecting surfaces of the 18-8 and CFRP prior to assembly and hot-pre...

2-layer laminated sheets (PU/PET) with Polyurethane (PU) and Polyethylene Terephthalate (PET) were prepared by an adhesion method of a double-step treatment consisting of applying low dose (≦0.43 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 3 MPa and 348 K. Although the adhesion of the PU/PET was observed w...

Experimental results show applying homogeneous low-energy electron beam irradiation (HLEBI) treatment of 0.30 MGy to both sides of sandwich structural CFRP/ABS/CFRP composite constructed of an ABS core between two thin plies of carbon cross textile fiber/epoxy CFRP apparently increased Charpy impact values, auc at all fracture probabilities, Pf at...

A new process of internal activation of glass fiber reinforced thermoplastic polymer (GFRTP) of Polypropylene (PP) was achieved by homogeneous low energy electron beam irradiation (HLEBI) to the interlayered glass fiber chopped strand mats (GF-CSM) prior to assembly. Panels were fabricated by hot-press consisting of 5 HELBI-treated GF-CSMs between...

Ultra-high molecular weight polyethylene (UHMWPE) has been used for the bearing materials of total joint prostheses. Strength criterion of medical UHMWPE is the tensile properties. However, the compression characteristic which is important in the contact surfaces of the prosthesis has not been considered. In this study, we examined the effect of ga...

2-layer laminated sheets (PE/18-8) with Polyethylene (PE) and austenitic 18-8 stainless steels (18-8) were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (≦0.43 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 5 MPa and 343 K. Although the weak hot-press adhesion o...

2-layer Titanium/Polyurethane (Ti/PU) laminated sheets were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (≦ 0.43 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 5 MPa and 413 K. Although the weak hot-press adhesion of the Ti/PU was observed without HLEBI, the ne...

A Ti/CF/CFRTP joint method was suggested for the carbon fiber reinforced thermoplastic ABS polymer (CFRTP), and titanium (Ti) with extremely large friction force induced by broad interface of carbon fiber cloth. The tensile stress-strain curves of Ti/CF/CFRTP joint prepared by lamination method by ABS plates and CF-cloth sheets were obtained. The m...

Adhesive 2-layer lamination joints of polyethylene terephthalate (PET)/epoxy resin were prepared without the use of hot press using a new adhesion method of applying homogeneous low energy electron beam irradiation (HLEBI) to the PET prior to assembly by hand pressure. HLEBI treatment within the range of 0.13 to 0.43MGy increased the adhesive force...

To obtain the high compressive electrostriction indicated by maximum strain (Smax) at low electric field (Emax), a dependence of solidification thickness on Smax was investigated for carbon nanoparticles dispersed polyurethane (PU) composite films. The thickness dependent Smax at 20MV/m from 7.52% for 143μm thickness to 47.7% for 21μm thickness exh...

PTFE (Polytetraflouroethylene) exhibits high strength, corrosion and heat resistance, although adhesion of PTFE with simple principal chains to others has not been easy. To create and improve the adhesion force, many sites number of chemical bonds at interface has been required. One of possible tool is homogeneous 100 keV class low voltage electron...

A new method with extremely large friction force by broad interface of carbon fiber (CF:6μm-diameter) have been suggested for a joint (M/CF/P and M/CF/M) of carbon fiber (CF) reinforced polymer (P) and metal (M). The new joint part was strengthened by impregnated carbon fiber (CF). The joint tensile strength (σB) values of both M/CF/P and M/CF/M jo...

Laminations of carbon fiber reinforced epoxy polymer (CFRP) and metals of Aluminum and 18mass%Cr-8mass%Ni austenite stainless steel (CFRP/Al and CFRP/18-8) were prepared by using a new adhesion method consisting of applying low dose of homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press in vacuum below 1 Pa for 2 h at 401±0....

We have studied the variation in tensile strength (σb), fracture strain (εf ) and Young modulus (dσ/dε) of low voltage electron beam irradiation (HLEBI) on powdered ultra-high molecular weight-polyethylene from 0.043 to 0.43MGy prior to sintering. The low dose of 0.043MGy-HLEBI enhanced the σb, εf and dσ/dε, as well as increased the crystallinity r...