Materials Science (MATER SCI-MEDZG)

Current impact factor: 0.51

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 0.51
2013 Impact Factor 0.336
2012 Impact Factor 0.522
2011 Impact Factor 0.492
2010 Impact Factor 0.409
2009 Impact Factor 0.299

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.64
Cited half-life 5.10
Immediacy index 0.03
Eigenfactor 0.00
Article influence 0.15
ISSN 1392-1320

Publications in this journal

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    ABSTRACT: In this article, we report the in situ synthesis of TiC ceramic layer between titanium plate and graphite phases in grey cast iron using heat treatment method. The microstructure of the compound region was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the kinetics of the TiC ceramic layer was analyzed. The results revealed that the as-prepared TiC samples were irregularly shaped particles with a size of 1 ~ 8 μm and gradient distribution on the surface of grey cast iron. The thickness of the reaction layers increased gradually as the incubation continued, which were 62, 81, 95 and 108 μm after incubation at 1164 °C for 1, 2, 3 and 4 hours, respectively. Also, it can be recognized that the layer thickness changes in a parabolic style with incubation duration. The formation process of TiC ceramic layer consists of diffusion and in situ reaction of carbon and titanium atoms. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The proton exchange membrane fuel cell (PEMFC) is a type of modern power, but the traditional proton exchange membranes (PEM) of PEMFC are limited by high methanol permeability and water uptake. Poly-ether-ether-ketone (PEEK) is a widely used thermoplastic with good cost-effective property. Sulfonated poly (-ether-ether-ketone) (SPEEK) has high electric conductivity and low methanol permeability, as well as comprehensive property, which is expected to be used as PEMs. However, the proton exchange ability, methanol resistance, mechanical property and thermal stability of SPEEK are closely related to the degree of sulfonation (DS) of SPEEK membranes. Additionally, the proton conductivity, methanol permeability, and stability of SPEEK membranes applied in various conditions need to be further improved. In this paper, the research into modification of SPEEK membranes made by SPEEK and other polymers, inorganic materials are introduced. The properties and modification situation of the SPEEK and the composite membranes, as well as the advantages and disadvantages of membranes prepared by different materials are summarized. From the results we know that, the methanol permeability of SPEEK/PES-C membranes is within the order of magnitude, 10-7cm2/s. The proton conductivity of the SPPESK/SPEEK blend membrane reaches 0.212 S cm-1 at 80 °C. The cross-linked SPEEK membranes have raised thermal and dimensional stability. The non-solvent caused aggregation of the SPEEK ionomers. The proton conductivity of SPEEK/50%BMIMPF6/4.6PA membrane maintains stable as 2.0 x 10-2S cm-1 after 600 h at 160 °C. Incorporation of aligned CNT into SPEEK increases the proton conductivity and reduces the methanol permeability of the composite membranes. The PANI improves the hydrothermal stability. More proton transfer sites lead to a more compact structure in the composite membranes. According to the results, the proton exchange capacity, water uptake, and conductivity of the SPEEK membranes are closely related to the structure, stability, mechanical and electrochemical property and methanol permeation of the PEMFC. The modification of SPEEK membranes will improve their applications in aviation, military and other industries. Some proposals for further research are put forward. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The thermodynamic behavior and the effects of energy saving in the production of Fe-Si-Ca master alloy from modified molten converter slag using SiO2 as a modifier were investigated by thermodynamic analysis with different additions of the modifier and reductant at various temperatures to fully recycle the physical sensible heat and valuable elements in the metallurgical slag. The results showed that the activity of SiO2 in the slag increased rapidly with the w(SiO2) increase from 40 wt.% to 60 wt.%, but the activity of CaO was low and decreased slightly with the w(SiO2) increase. When the w(SiO2) in the slag was 60 wt.% with an external addition of 35 wt.% of reductant at 1800 °C, the reduction ratios of silicon and calcium reached 90.05 mass % and 52.87 mass %, respectively, and the w[Si] and w[Ca] in the master alloy were 51.60 wt.% and 17.67 wt.%, respectively, resulting in an energy saving of 805.6 kWh per ton of produced ferroalloys. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: Diopside exhibits favorable potential for bone repair on account of the good mechanical performance, bioactivity and biocompatibility. In this paper, diopside scaffolds with high pore interconnectivity were successfully fabricated by laser three-dimensional (3D) printing. The microstructure and mechanical performance of the diopside scaffolds were studied. The experimental analysis indicated that diopside particles gradually fused together until a dense structure was built with an energy density increasing in the range between 2.4 and 4.8 J·mm-2. Meanwhile, compressive strength and fracture toughness increased gradually from 5.96 ± 0.88 MPa to 10.87 ± 0.55 MPa. However, mechanical properties decreased due to the appearance of voids when energy density were 5.4 and 6 J·mm-2. Simulated body fluid (SBF) tests showed that apatite crystals formed on the diopside scaffolds surface, and the apatite crystals increased with soaking time. Cell culture tests indicated the scaffolds supported the adhesion and growth of MG-63 cells. The study suggested that diopside scaffolds fabricated by laser 3D printing are promising candidates for bone tissue engineering. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: Brazing diamond particles to a steel substrate using Ni-based filler alloy was carried out via laser in an argon atmosphere. The brazed diamond particles were detected by scanning electron microscope (SEM), X-ray diffraction (XRD), and energy dispersive X-ray spectroscopy (EDS). The formation mechanism of carbide layers was discussed. All the results indicated that a high-strength bond between the diamond particles and the steel substrate was successfully realized. The chromium in the Ni-based alloy segregated preferentially to the surfaces of the diamonds to form a chromium-rich reaction product, and the bond between the alloy and the steel substrate was established through a cross-diffusion of iron and Ni-based alloy. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: A detailed research on the magnetic properties, preparation, and application of two-phase composite magnetic material was conducted in this paper. Firstly, in order to obtain the characteristics of high remanence and low coercivity, a micro field mathematical model of hysteresis was established and the magnetization model of this material was determined on the basis of micro magnetic theory. Secondly, the relationship between remanence and coercivity was analyzed and the preparation technology of the material was proposed from the perspective of the elemental composition, the heat treatment, and the other steps. Finally, after mastering the magnetization characteristic, conversion and control mechanism of the material, a new power transformer with function of DC bias compensation based on the two-phase composite magnetic material was proposed. The simulation and experimental results showed that the transformer could achieve a good compensation for the DC bias problem by using material remanence, which provides intelligent and energy-saving electrical equipment for the electric network safe operation. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The increase of well-being culture of problem related to environmental depletion of resource is not the growing interest in timber the natural material of construction markets. Also, the perception for historic preservation has been increased in respond to heightened interest. However, it is fairly difficult for architectural properties to maintain their durability because it was made by timber construction. Preventing traditional structure from damage and structural performance reduction is paramount in maintenance problem. A number of studies of reinforced method have been conducted in order to solve such a problem. In this paper, external bonded reinforcement and near-surface mounted was used as a way to reinforce timber structure’s durability. Bond strength for specimens with different bond length was investigated. As a result showed, maximum bond strength in bond length 300 mm from all method, was found to be not increased of bond strength over the certain bond length. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: A thermodynamic model enabling calculation of equilibrium carbonitride composition and relative amounts as a function of steel composition and temperature has been developed previously based on the chemical equilibrium method. In the present work, actual carbonitride precipitation behaviour has been verified in the Ti-Nb-C-N microalloyed steels. The Ti microalloyed steel after refining with 0.012% Nb exhibited highly improved tensile strength without sacrificing ductility. According to further detailed SEM and TEM analysis, the improved mechanical properties of Ti/Nb microalloyed steel could be attributed to the larger solubility of Nb and Ti, inducing fine dispersion of the carbonitrides with particle size of 2–10 nm in the ferrite matrix. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The grain size of as-extruded AZ91 magnesium alloys was refined to 12.31 μm from 21.41 μm by recrystallization annealing. The vacuum diffusion welding of as-annealed AZ91 magnesium alloys was researched. The results showed that the maximum shear strength of joints reached 64.70 MPa in the situation of 10 MPa bonding pressure, 18 Pa vacuum degree, 470 °C bonding temperature and 90 min bonding time; both bonding temperature and time are the main influence factors on as-extruded AZ91 magnesium alloys diffusion welding. Then the diffusion welded specimens were annealed, and the shear strength of joints was further improved to 76.93 MPa. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The bi-stable cylindrical composites, which are composed of the fiber-through-thickness variation functionally graded material (FGM) subjected to a temperature gradient field, studied in the paper. The advantages of both of the FGMs’ adaptability for the temperature field variation and the bi-stability of the un-symmetric and anti-symmetric orthogonal lay-ups are combined, the presented bi-stable structure has a potential application in many fields. The thermal-induced bi-stable FGM un-symmetric and anti-symmetric orthogonal shell is studied by the finite element analysis. The different FGM lay-ups are simulated successfully by the commercial finite element software ABAQUS and its subroutines. The curved shapes, the temperature-load history and stress distributions are also given to understand this bi-stable phenomenon. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: Surface roughness is a very important index in silicon direct bonding and it is affected by processing parameters in the wet-activated process. These parameters include the concentration of activation solution, holding time and treatment temperature. The effects of these parameters were investigated by means of orthogonal experiments. In order to analyze the wafer roughness more accurately, the bear ratio of the surface was used as the evaluation index. From the results of the experiments, it could be concluded that the concentration of the activation solution affected the roughness directly and the higher the concentration, the lower the roughness. Holding time did not affect the roughness as acutely as that of the concentration, but a reduced activation time decreased the roughness perceptibly. It was also discovered that the treatment temperature had a weak correlation with the surface roughness. Based on these conclusions, the parameters of concentration, temperature and holding time were optimized respectively as NH4OH:H2O2=1:1 (without water), 70 °C and 5 min. The results of bonding experiments proved the validity of the conclusions of orthogonal experiments. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: Developments in micro and nanofabrication technologies have led a variety of grating waveguide structures (GWS) being proposed and implemented in optics and laser application systems. A new design of multilayered nanostructure double-grating is described for reflection notch filter. Thin metal film and dielectric film are used and designed with one-dimensional composite gratings. The results calculated by rigorous coupled-wave analysis (RCWA) present that the thin metal film between substrate and grating can produce significant attenuated reflections and efficiency in a broad reflected spectral range. The behavior of such a reflection filter is evaluated for refractive index sensing, which can be applied inside the integrated waveguide structure while succeeding cycles in measurement. The filter peaks are designed and obtained in a visible range with full width half maximum (FWHM) of several nanometers to less than one nanometer. The multilayered structure shows a sensitivity of refractive index of 220nm/RIU as changing the surroundings. The reflection spectra are studied under different periods, depths and duty cycles. The passive structure and its characteristics can achieve practical applications in various fields, such as optical sensing, color filtering, Raman spectroscopy and laser technology. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: The stress-strain states of the model of laser welded dimple jacket is analyzed using ANSYS/LS-DYNA in order to determine the relation between bulging height and pressure and to achieve the controllability of pressure distension of the jacket. It is shown that in the same conditions, the bulging height increases with the increasing of the bulging pressure and the space of honeycomb. And it will decrease when the thickness of jacket plate changing larger. A table showing the relation between bulging height and pressure is obtained. An experiment using a test panel is conducted to certify the reliability of finite element analysis. It turns out that the data of finite element analysis is coincident with experimental data, which support finite element method based ANSYS/LS-DYNA can be an efficient way to research the laser welded dimple jacket. The relation table is useful as guidance for the fabrication process. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: In some studies, the metal materials with different magnetic permeability and same chemical composition need to be prepared to avoid the interference caused by different compositions and make the parameter of magnetic permeability become the key variable directly. In order to prepare the metal materials with different magnetic and same component, the paper has considered other two commonly schemes, such as the casting method by adding some ferromagnetic elements and the heat-treatment process to increase its phase content of martensite or ferrite. Finally, it has been found that the cold working process was preferable if the austenitic stainless steel 1Cr18Ni9Ti with paramagnetic was selected as a raw material, because it got better control in forging ratio. The method of magnetic balance has been used to measure the relative magnetic permeability of every specimen with different hardness HB 165 (A), HRC 20 (B), HRC 25
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: Electroluminescence(EL) intensity of the polyimide (PI)films wastested under dc high electric field by home-made experimental device. The results showed that the EL intensity of PI films increased alongwith the electric field. EL intensity is approximately to background intensity when the electric-field intensity was less than 2.00MV/cm. EL intensity increasesalong with increasing the electric field when electric-field intensity greater than 2.00MV/cm. When electric-field at 2.80MV/cm, EL intensity increasing strongly suggests that the excitation process related to hot electrons accelerated by the field approaching a critical threshold. Meanwhile, this work elaborates a method to deal with identical samples get different experimentaldataby using Weibull distribution method, and the concept of the reliability was presented. The nine groups of EL experimental data were analyzed,and the result showedthat the lifetime of mid-value(t=164.9min). Mid-value of the breakdown field is E=2.76MV/cm. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science
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    ABSTRACT: In this manuscript we suggest a three-dimensional reconstruction technique to fully characterize structural performance of solid materials. The described technique extrapolates, measures and interprets the 3-dimensional data which is extracted from SEM images, obtained from different angles. Further, finer results were achieved by extrapolating of spatial data from three or more sample images using visual reconstruction software applications. Gold particles, silicon wafers and dendrites were selected as model materials for the spatial 3D surface reconstruction. For comparison and proof-of-concept, stereoscopy technique was also included into the research. © 2015, Kauno Technologijos Universitetas. All rights reserved.
    No preview · Article · Nov 2015 · Materials Science