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Thermostability is a crucial property of biological materials, especially in the case of their potential application in materials science, including such novel directions as Extreme Biomimetics. This approach includes research at high temperatures without destroying the 3D structure of selected biological materials that allow the development of nov...
Article
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The high entropy AlCoFeNiTi and AlCoFeNiTiSi alloys were prepared by two methods to determine the influence of the cooling rate on the structure and properties. The Mössbauer spectra of AlCoFeNiTi alloys showed the coexistence of a nonmagnetic part with a magnetic hyperfine portion. The spectra for AlCoFeNiTiSi alloy in an as-cast and plate states...
Article
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Openings in reinforced concrete (RC) beams may be required due to building installations (electrical, water, etc.). They weaken its cross-sectional area and, in case of fire, can increase the thermal field of the structure. NBR 15200 does not consider this. The paper evaluated the influence of rectangular openings on the Fire Resistance Rating (FRR...
Article
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Amorphous melt- spun Al86Cu6Y6La2 (at.%) alloy is hot consolidated at T = 723 K and P = 700 MPa. The glassy ribbons show three devitrification steps which fcc-Al phase is precipitated during the first crystallization stage, and formation of intermetallic compounds (Al3Y, AlCu, AlCu3 and Al3Y5) take place in the next steps. The calculated Avrami exp...
Article
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PBT and PET are subjected to thermal-oxidative degradation and thermomechanical degradation during the process of melt blending, which affect the polymer structure and properties. The effect of feed properties of PET and the addition of modified nanoparticles on blends are a question worthy of discussion. This work describes the melting and thermal...
Article
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Concrete-filled steel tubular (CFST) columns are composite sections that may contribute to reduce the environmental impact in construction through a more efficient use of resources. By embedding a steel profile inside a CFST section, a new typology is generated, the so-called steel-reinforced concrete-filled steel tubular (SR-CFST) columns, which m...
Article
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The study evaluates the performance of laboratory, single-layered particleboards made out of fructose-hydroxymethylfurfural-bishexamethylenetriamine (SusB) adhesive as a sustainable alternative. Several production parameters such as mat moisture content (MMC), adhesive amount and press time were varied and their effect on the bonding efficiency inv...
Article
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Exotic optical, thermoelectric properties and flexibility to exist in different shape and sizes make lead chalcogenides an attractive candidate for many futuristic applications. This report presents a comprehensive study of seed-nucleated controlled growth of multi-armed polyol based lead sulphide (PbS) nanoparticles and propose cubic-to-flower sha...
Article
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Space borne Synthetic Aperture Radar plays a dominant role in the earth observation satellites having day-night and all-weather applications. Transmit Receive (TR) modules form the core of the radar payload. Each satellite has hundreds of such TR modules whose reliable performance determines the life of the radar imaging payload. During launch, the...
Article
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Thermal analysis is widely used to investigate the properties of a variety of energetic materials, including the mutual compatibility of components of energetic material mixtures. Although thermal analysis methods are a valuable source of information about energetic materials, their use requires careful consideration of the employed methodology, as...
Article
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Nanofluids have unique features that make them potentially valuable in a variety of medicinal, technical, and industrial sectors. The widespread applications of nanotechnology in modern science have prompted researchers to study nanofluid models from different perspectives. The objective of the current research is to study the flow of non-Newtonian...
Article
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This article deals with the characterization of the thermal-induced aging of soft polyurethane (PU) foams. There are studied thermal and mechanical properties by means of thermal analysis, tensile, compression and dynamic mechanical vibration testing. It was found in this study, that the increasing relative humidity of the surrounding atmosphere le...
Article
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Mixed ligand complexes of the type [ML 1 L 2 (H 2 O)n]Cl (where M= Co II , Ni ΙΙ and Cu II , L 1 =urea and L 2 =histidine) have been synthesized by the reactions of anhydrous metal chlorides with the two ligands in 1:1:1 molar ratios. The resulting complexes have been characterized by elemental analysis, molar conductivity measurement, IR, mass, el...
Article
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The advancement in the thermal engineering presented the idea of nanomaterials with stable thermal consequences and performances. The importance of hybrid nanomaterials attributes importance in solar energy production, electronics devices, heating systems, mechanical processes etc. The hybrid model is classified as a distinct thermal phenomenon wit...
Article
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Na competitividade comercial da atualidade, as indústrias precisam produzir o máximo possível com a qualidade esperada e, um dos grandes vilões da produtividade industrial são as paradas não programadas por conta de falhas em equipamentos. A manutenção corretiva planejada, preventiva e preditiva são grandes aliadas da produtividade, pois com auxili...
Article
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Background: The thermal effect correlated with implant osteotomy could produce significant effects on the healing process and fixture osseointegration. The aim of the present investigation was to assess the heat generation and surface wearing of dental implant drills and manual tappers during simulated osteotomies on animal ribs. Methods: Steel dri...
Article
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Temperature prediction is crucial to build dependable CubeSats and operate them at peak efficiency. Therefore, all parameters that could impact the thermal performance of the satellite must be taken into account in the thermal analysis. This work covers the thermal simulation of a 1U CubeSat. The objective is to simulate, using the commercial softw...
Conference Paper
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The use of post-installed and cast-in anchors is a worldwide practice. They are needed for structural and non-structural connections. They can offer high load-bearing capacity and ease of use for various types of systems. Their design covers a variety of failure modes at ambient temperature (e.g., concrete cone breakout, pull-out, steel...). Under...
Preprint
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Arenediazonium salts represent an important class of aromatic organic compounds widely used as building blocks in academia and industry. Due to the high energy associated with the diazonium group, many of these salts are reported as thermally unstable and/or unsafe to work with. However, most of the tetrafluoroborate arenediazonium salts, are fairl...
Conference Paper
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In this study, aerospace component was selected for selective laser melting (SLM) process of AlSi10Mg is consider for thermal analysis simulation by additive software. The material used different process parameters for thermal analysis simulation to evaluate for manufacturing free additive manufacturing (AM) component. The process simulation given...
Article
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In this experimental study, the annual performance and economic analysis of an evacuated tube augmented solar still is presented from June 2020 to May 2021. The experiments are also performed simultaneously on a conventional still as well. The experiments are performed throughout the year at 6 cm water depth for both solar stills in the climate of...
Conference Paper
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When exposed to high temperatures, such as in a fire situation, the physical and resistance characteristics of the materials employed in the structure deteriorate as the temperature increases. This fact promotes a considerable loss in the bearing capacity and stiffness of the structural system. The verification of a structure exposed to fire depend...
Article
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This paper is a literature survey that focuses on the present development of thermokinetic publications. It demonstrates that in recent years pyrolysis kinetics has turned into a major application of the thermokinetics. Analysis of the respective publications suggests that too often their quality leaves much to be desired because of the poor choice...
Article
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With increasing initiatives on “clean power plan” and “carbon neutrality,” gasification is one of the most promising ways toward cleaner energy production using a diverse range of feedstocks. However, prior to gasification, the feedstock must be thoroughly analyzed. The characteristics of various feedstocks, including coal, biomass, petcoke, munici...
Article
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The kinetics of the solid-state reaction between nanolayers of polycrystalline copper and amorphous silicon (a-Si) has been studied in a Cu/a-Si thin-film system by the methods of electron diffraction and simultaneous thermal analysis (STA), including the methods of differential scanning calorimetry (DSC) and thermogravimetry (TG). It has been esta...
Article
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Developing multicomponent crystal forms, especially cocrystals and salts, is becoming a promising pathway to improve the solubility and bioavailability of drugs. Herein, new multicomponent crystals of SHR0302, a new generation of Janus Kinase (JAK) inhibitor that suffers from poor solubility, were developed based on a cooperative approach of comput...
Article
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Fast-grown Paulownia wood is extensively used as construction material in China. The mechanical properties of Paulownia wood at room temperature are well known. However, investigations of its mechanical behavior at elevated temperatures are very limited. To address this issue, thermal analysis was conducted to investigate the mass loss and reaction...
Article
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The present study show the usability of starch (tamarind) based-bio-composite film reinforced by fenugreek by various percentages to replace the traditional petrochemical plastics. The prepared bio-composite films were systematically characterized using the universal testing machine (UTM), soil degradation, scanning electron microscope (SEM), X-ray...
Article
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Shrinkage greatly influences the mechanical and fatigue properties of compacted graphite iron and it is necessary in order to study the causes of shrinkage in compacted graphite iron and to predict it effectively. In this paper, a kind of cylindrical necking test sample was designed to evaluate the shrinkage in compacted graphite iron, and a method...
Article
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Binary intermetallic compounds, such as FePd3, attract interests due to their physical, magnetic and catalytic properties. For a better understanding of their hydrogenation properties, both ordered FePd3 and disordered Fe0.25Pd0.75 are studied by several in situ methods, such as thermal analysis, X-ray powder diffraction and neutron powder diffract...
Article
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In this study, polyaluminum sulfate (PAS) coagulant was selected to evaluate the coagulation performance of polystyrene microplastics. Overall, polystyrene removal efficiency was 90.4 % at the optimal dosage of 7.5 g/L of PAS. In addition to the type of coagulants (e.g. polyaluminum chloride, iron(III) chloride, and polyferric sulfate), surface cha...
Article
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The preparation and properties of a series of novel 1,3-dihydro-2H-benzimidazol-2-one nitro and nitramino derivatives are described. A detailed crystal structure of one of the obtained compounds, 4,5,6-trinitro-1,3-dihydro-2H-benzimidazol-2-one (TriNBO), was characterized using low temperature single crystal X-ray diffraction, namely an orthorhombi...
Presentation
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Presentación del nuevo software gratuito de simulación de comportamiento térmico de fluidos en tubos de sección circular HEATT© (Herramienta de Evaluación y Análisis Térmico en Tuberías). Presentation of the new free software for simulation of thermal behavior of fluids through circular section tubes HEATT© (Tool of Evaluation and Thermal analysis...
Article
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This research estimates the high-cycle fatigue (HCF) life of integrated concrete bridge installed on water due to temperature changes. To this end, CATIA software was used to geometrically model of a real-scale bridge. Next, thermal–structural coupling analysis was performed by finite element (FE) simulation in ANSYS WORKBENCH software. The compari...
Conference Paper
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Aluminum and its alloys are frequently used in engineering applications due to their superior properties. One of the major challenges in casting aluminum alloys is the formation of hot cracks during solidification. One of the methods used to prevent this defect is grain refinement. Literature research has revealed that Al5Ti1B master alloy does not...
Article
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This study describes a polymer potentially used as a vaccine adjuvant. We first synthesized a novel polyacrylic acid modified by perfluorinated butanol—a bioactive compound that is biocompatible. The main aim was to functionalize the polyacrylic acid by fluorine. This functionalization could offer a permanent graft by an esterification reaction. Th...
Article
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The increase in the use of additive manufacturing (AM) has led to the need for filaments with specific and functional properties in face of requirements of structural parts production. The use of eco-friendly reinforcements (i.e., natural fibers) as an alternative to those more traditional synthetic counterparts is still scarce and requires further...
Article
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The operating temperature and thermal stress play key roles in overall performance of a cylindrical roller bearing used in high-speed train traction motor. The cylindrical roller bearing studied in this paper is in the housing of the traction motor. Due to the heating of each component of the traction motor, a thermal environment is formed in the h...
Article
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In recent days, synthetic fibers are replaced by natural fibers in composite materials, due to their eco-friendly nature. Because of this reason, in this research work, the Caryota fibers were extracted from the fishtail form tree and to investigate the static mechanical, thermal, and water absorption properties. The mechanical properties of 6ATCF...
Article
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The uniqueness of nanofluids in the field of thermal analysis and engineering is associated with their thermal conductivity and thermodynamics. The dynamics of water made up of (i) single-walled carbon nanotubes with larger magnitudes of thermal conductivity of different shapes (i.e., platelet, cylindrical, and spherical) and (ii) moderately small...
Article
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This paper proposes a simplified lumped parameter thermal network (LPTN) model for thermal analysis under the inter-turn short-circuit (SC) faults of a five-phase fault-tolerant permanent magnet (PM) motor for electric vehicles. The proposed model can consider circumferential heat transfer, variable copper loss, and uneven loss distribution. Firstl...
Article
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The aim was to investigate the relationship of charred layer parameters (also wood fire resistance) and moisture content of European larch (Larix decidua L.) wood. For this purpose, finite element model (FEM) was developed. To develop FEM, ANSYS software and transient thermal analysis were applied. To validate developed FEM, the medium-scale fire t...
Article
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Background: The occurrence of bone fractures is increasing worldwide, mainly due to the health problems that follow the aging population. The use of additive manufacturing and electrical stimulators can be applied for bioactive achievements in bone healing. However, such technologies are difficult to be transferred to medical practice. This work ai...
Conference Paper
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Aggregation has a significant control over the fate of plastics in natural waters. It can increase the rate of settling and deposition of microplastic (MP), thus reduce bioavailability and ecotoxicologial effect of MP on pelagial organisms. Homoaggregation, the aggregation of the same kind of particles, is poorly understood in the case of MP. In ou...
Article
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Serpentinites are metamorphic rocks that are widely applied as aggregates in the production of radiation-shielding concrete. Different varieties of massive serpentinite mountains located in Egypt exist without real investment. Hence, this study aims to evaluate the radiation shielding efficacy of three varieties of serpentinite rocks from different...
Conference Paper
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Population growth in central settlements necessitates the transmission and distribution of electrical energy from underground. Changes that may happen in ambient conditions during the use of cables cause the cables to breakdown, with a negative effect on the temperature change of the cable and therefore on the current carrying capacity. In this stu...
Article
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The rising cost of petrochemicals owing to the rapid depletion of fossil resources has gradually divert research interest to novel chemicals derived from biomass feedstock. In this study we explored the synthesis, properties and ecotoxicity of a series of sustainable poly(hexylene 2,5-thiophenedicarboxylate-co-bis(2-hydroxyethoxybenzene)s (PTBHs) c...
Article
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Iron-nickel alloys with certain compositions are known for their very exceptional properties: e.g., FeNi36 with a nickel content of 36 %, also known as Invar 36, shows a very low coefficient of thermal expansion (CTE). For this reason, the use of FeNi36 has revolutionized the design of many precision instruments. The special property of a very low...
Article
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In this work, scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry were used to investigate the solidification structure, thermal behavior, and kinetics of the martensitic transformations of the (Mn,Ni)Sn as-spun and annealed ribbons synthesized by melt-spinning. At room temperature, the as-spun and annealed (Mn,Ni...
Article
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The structure, morphology, and sonophotocatalytic activity of Ni-Zn-Co ferrite nanoparticles, embedded in a SiO2 matrix and produced by a modified sol-gel method, followed by thermal treatment, were investigated. The thermal analysis confirmed the formation of metal succinate precursors up to 200 °C, their decomposition to metal oxides and the form...
Article
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Preparation of nano-rod aluminosilicate Mazzit (MAZ) zeolite under low-cost and environmental-friendly route is attractive, but still challenging. Herein, we report a green route for synthesizing nano-rod MAZ zeolite (MAZ-N) using low-cost and environmental-friendly choline chloride as template. Various characterizations including powder X-ray diff...
Article
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Unexplainable indoor thermal comfort events from black-box models influence people to distrust suggestions from decision-support systems and ask for help from engineers and practitioners that are labor-intensive and time-consuming. These problems come from unknown cause-and-effect in the environments that cause the system not to produce explainable...
Article
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Chemical energy ferroelectrics are generally solid macromolecules showing spontaneous polarization and chemical bonding energy. These materials still suffer drawbacks, including the limited control of energy release rate, and thermal decomposition energy well below total chemical energy. To overcome these drawbacks, we report the integrated molecul...
Article
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In this work, the authors investigate the calibration target design for sub-millimeter wave radiometer applications, with specific focus on further improving the brightness temperature radiation accuracy during the miniaturization. The investigation is based on latest design of curved inner kernel for the frequently utilized periodic coated pyramid...
Article
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This study evaluated similarities/dissimilarities of raw and processed chicken breast and thigh lipids that were complexed by β-cyclodextrin, using a combined FTIR–PCA technique. Lipid fractions were analyzed as non-complexed and β-cyclodextrin-complexed samples via thermogravimetry, differential scanning calorimetry and ATR-FTIR. The lipid complex...
Article
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Increasing demand for biodegradable , eco-friendly, and sustainable textile products to confront environmental pollution accelerates the research on natural fibers. Researchers are also in search of novel natural fibers to be used in different textile products. The present study attempts to extract textile-grade novel Bauhinia vahlii fibers (BVFs)...
Chapter
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Excessively high temperatures will interfere with the operation of the components and damage equipment. The key to fixing this is to generate uniform heat dissipation and maximize heat dissipation. This paper proposed a cold plate with three S-type multistage Tesla valves (ST-MSTV). Thermal performance was first evaluated with flow direction and an...
Article
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This paper represents the thermal analysis of an under-construction concrete dam. The temperature distribution of the Dasu dam was analyzed by the thermal and heat of hydration model in this case study. An exponential function was used for the heat of hydration because an adiabatic calorimetric test was not available for the concrete mixture in Das...
Article
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В статье рассмотрено золотое рудопроявление Голенькие Горки, входящее в Сиратурское рудное поле. Оно расположено в северной части южноуральского сегмента Главного Уральского разлома, в зоне сочленения Башкирского мегантиклинория с северным замыканием Магнитогорской мегазоны. Углеродистые и углеродисто-хлорит-кварцевые сланцы имеют площадное распрос...
Article
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Characterization of thermal properties of different ages highland bamboo fiber attributes extracted chemically and mechanically is the focus of this study. Samples of length 25–30 cm were harvested at various ages from the middle of the stem, which was then soaked in different NaOH weight-by-volume concentrations and soaked in water for different d...