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Preparation and Characteristic of Glass-Ceramics with Super Low Thermal Expansion Coefficient Wang Kun1,Zhao Chunxia1,Jiang Hui1,Chen Guangle1,Wang Shengjun1,Fan Shigang1 (1.Research Institute of Synthetic Crystals, Beijing 100018, China) Abstract:The preparation technics of glass-ceramics with super low coefficient of thermal expansion containing β-quartz solid solution as a main crystal......
) at room temperature, and increases to 94.997 W/(m?K) after annealing treatment. The calculated results of thermal conductivity of the Si3N4p/Al composite by Maxwell model, H-S model and PG model... Si3N4 and aluminium were studied, the effect of annealing treatment on thermal conductivity was discussed. 2 Experimental The β-Si3N4 particles with an average particle size of 0.2 ?m, as shown in Fig.1......
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Dielectric properties of doped silicon carbide powder by thermal diffusion SU Xiao-lei(苏晓磊), LI Zhi-min(李智敏), LUO Fa(罗 发), WANG Xiao-yan(王晓艳), ZHU Dong-mei(朱冬梅), ZHOU Wan-cheng(周万城) State Key... by the thermal diffusion process in nitrogen atmosphere at 2 000 ℃. Graphite film with holes was used as the protective mask. The dielectric properties of the prepared SiC powders at high frequencies......
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by X-ray diffractometry. Together with polishing and thermal treatment, the increment of the sum of principal residual stresses was used to determine the residual stresses distribution of ground Cf... residual stresses can be eliminated by thermal treatment process. Key words: Cf/SiC composites; ground-introduced residual stress; thermal treatment ......
Effect of Thermal Treatment on Microstructure and Phase of Partially-stabilized Zirconia胡永刚,肖建中,XIA Feng,ZHANG HaiboCollege of Material Science and Engineering, Huazhong University of Science... was beneficial to refine grain. The effect of thermal treatment on the formation of monoclinic phase was discussed. It can be found that, the grain size and the fraction of the monoclinic phase......
that annealing treatment can effectively relieve thermal mismatch stress at interface and reduce residual tensile stress in aluminum matrix. Reliving of thermal mismatch stress at interface means... Interface and thermal expansion of carbon fiber reinforced aluminum matrix composites ZHANG Yun-he(张云鹤)1, WU Gao-hui(武高辉)2 1. School of Mechanical and Electrical Engineering, Northeast Forestry......
to thermal cycling treatment. In order to simulate the thermal cycling under extreme service conditions(space or moon environments), the sand-cast and T6 treated GW63 alloys were subjected to thermal...Microstructure and mechanical properties of sand-cast Mg-6Gd-3Y-0.5Zr alloy subject to thermal cycling treatmentBeiping Zhou,Wencai Liu,Guohua Wu,Liang Zhang,Xiaolong Zhang,Hao Ji,Wenjiang......
