Materials Literature
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Hitozan je kationski biopolimer, pridobljen iz polisaharida hitina. Zaradi svojih izjemnih lastnosti, kot so biorazgradljivost, netoksicnost in protimikrobna ucinkovitost je hitozan nasel uporabnost na razlicnih podrocjih, predvsem v farmaciji, medicini in tekstilni industriji. V zadnjem casu je mogoce opaziti porast…
A new prediction method for fatigue life in very high cycle regime was proposed based on the Paris power law. Exponent m and coefficient C in the power law obtained from experimental S-N data showed a good linear relation on a log-log diagram. Also, the exponent m was explained by the Vickers hardness of materials. Pr…
运用电场激活压力辅助合成（FAPAS）和原位合成技术制备了（TiC）pNi/TiAl/Ti功能梯度材料,研究了电场对材料合成及层界面扩散连接的作用。采用光学显微镜、扫描电子显微镜、能谱和X射线衍射仪分析了梯度材料各层及界面微观组织、相组成和元素分布。结果表明,电场的施加以及TiAl的燃烧反应是合成材料的关键;经原位合成的TiC颗粒均匀细小;金属陶瓷层/TiAl/Ti基板的界面区产生了成分的互扩散并形成了良好的冶金结合。钛板到金属陶瓷层的显微硬度呈梯度变化且具有较好的抗热震性。
For about a half century up to today since the invention of Ti-Ni shape memory alloy, diverse products have been developed. However, compared with iron, copper, aluminum, and other metals and alloys, types of Ti Ni shape memory alloy materials and products made of them are still unpopular. This is because only a small…
Nanocomposite made of photoresist and functional nanoparticles has been greatly expected to active micro components for micro/nano systems made by photolithography only. In this study, we propose an in situ microfabrication method for active microcomponents for microfluidic systems. A sacrifical layer made of a positi…
Разработан метод расчета напряжений и деформаций при закалке железнодорожных рельсов. Использование обобщенного урав- нения теплопроводности гиперболического типа позволило выявить колебательный режим изменения температур, деформаций и напряжений при тепловом ударе, сопровождающем начальную стадию закалки. Другим элем…
There have been a number of issues concerning the sliding characteristics of oil-impregnated sintered bearings caused at the temperature below zero. However, the relationship between bearing design parameters and tribological characteristics below zero has not been clarified yet. In this study, we experimentally inves…
Polytetrafluoroethylene (PTFE) has low frictional properties and it is used for sliding materials. However, because of low wear resistance, it should be improved. CNF is one of the suitable materials for which wear properties can be improved by a small amount of addition. In this study, Carbon Nanofibers were added to…
A polymer electrolyte membrane (PEM) is used as electrolyte in polymer electrolyte fuel cell (PEFC). PEM has to be kept moderately moist for the PEM to have the ability to conduct electricity. Moisture content of film depends on the relative humidity of the supply gas. Since relative humidity of the supply gas is chan…
For the future construction of the large scale space platform on the earth orbit, the structural engineering materials with the high specific strength and modulus is required to braze in space. The combination of carbon/carbon composites and titanium is one of those candidates. In the brazing process of the combinatio…
Electroplated copper thin films have started to be applied to not only interconnections in printed wiring boards, but also thin film interconnections and TSV in semiconductor devices because of its low electric resistivity. However, the electric resistivity of the electroplated copper thin films was found to vary dras…
Microbubbles oscillating nonlinearly in the ultrasound field are used for contrast agents. In particular, microbubbles surrounded by a protein, lipid, or polymer shell show a mechanical property different from micobubbles without shell. This research, after deriving an analytical model and the governing equation inclu…
采用溶胶-凝胶法制备了TiO2-Al2O3复合载体,将不同含量的Na2WO4负载于TiO2-Al2O3载体上,通过测定比表面积（BET）确定了Na2WO4的最佳负载量为10%。以Na2WO4/TiO2-Al2O3为催化剂,进行了催化柴油的氧化脱硫实验,考察了Na2WO4负载量、催化剂用量、反应温度和反应时间对柴油氧化脱硫反应的影响。结果表明：Na2WO4的引入影响了TiO2-Al2O3载体的表面结构,当Na2WO4负载量为10%时,催化剂Na2WO4/TiO2-Al2O3比表面积最大为221.9 m2/g。Na2WO4/TiO2-Al2O3催化剂的柴油氧化脱硫最佳工艺条件为：硫质量分数为0.776%的柴油25 mL,Na2WO4负…
Colloidal damper is a new damper which uses a principle of difference of surface extension force, which is occurred by the direction of movement of surface. Some characteristics of the colloidal damper were investigated by our group. That is, a damping characteristics of colloidal damper for the amount ratio of silica…
The low friction coefficient of carbonaceous coatings under lubrication condition are desirable for industrial fields, however, these coatings, especially hydrogenated Diamond-Like Carbon (a-C:H), do not show low friction coefficient. In this study, the ultraviolet light irradiation method to obtain low friction prope…
This paper presents an investigation of the influence of nitrogen addition on the electrical properties of diamond-like carbon (DLC) films on glass substrates using RF plasma chemical vapor deposition, the respective Hall effect of the DLC films were evaluated and compared as a function of Nitrogen concentration. And…
Effects of dissolution treatment on the Charpy impact value (a_uc) of transparent silicate glasses were studied under 0.18 MPa at 390 Kin the distilled water. The dissolution phenomenon was confirmed by the clearly mass decrease of transparent silicate glasses. Dissolution treatment at less than 0.3 h enhanced a_uc va…
Using a conductive soft Si probe for atomic force microscopy as an electrode of nanomanipulater installed in a transmission electron microscope, we successfully measured forces generated by one-way shape memory effect of a carbon nanotube (CNT). We revealed from the measured forces that the recovery moment is about se…
In this paper, a new system for measurement of the hair condition is proposed. In this system, the voltages induced by the electrostatic charge between the proposed sensor and the hair are measured. The hair condition is estimated by using the measured waveform at the hair condition. In the experiment, three hair samp…
The subloop behavior for the superelastic deformation of TiNi shape memory alloy was investigated based on the local temperature variation and the surface observation in the tension test. The results obtained are summarized as bellows. (1) The upper and lower stress plateaus during loading and unloading appear accompa…