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Fabrication and test of reaction bond silicon carbide for optical applications YAO Wang(姚 旺), ZHANG Yu-min(张宇民), HAN Jie-cai(韩杰才), ZUO Hong-bo(左洪波) Center for Composite Materials, Harbin... that this reaction bonding process is a feasible method to produced high quality RBSiC optical mirror. Key words: RBSiC; silicon carbide; fabrication; optical applications; polishability; property......
Silicon assistant carbothermal reduction for SiC powdersKezhi Li, Jian Wei, Hejun Li, Chuang Wang, and Gengsheng Jiao National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China摘 要:The silicon assistant method to increase the reaction yield of carbothermal reduction of silica at a lower......
Microstructure and properties of electronic packaging shell with high silicon carbide aluminum-base composites by semi-solid thixoformingGUO Ming-hai(郭明海), LIU Jun-you(刘俊友), JIA Cheng-chang(贾成厂), JIA... silicon carbide aluminum-base composites was prepared by semi-solid thixoforming technique. The flow characteristic of the SiC particulate was analyzed. The microstructures of different parts of the shell......
Simulation of macrosegregation in a 36-t steel ingot using a multiphase modelZhuo Chen,Hou-fa ShenKey Laboratory for Advanced Material Processing Technology, Ministry of Education, School of Material... convection during casting. In this study,a three-phase(liquid, columnar dendrites, and equiaxed grains) model is proposed to simulate macrosegregation in a 36-t steel ingot. A supplementary set of conservation......
SUBSTRATE EFFECT ON HYDROGENATED MICROCRYSTALLINE SILICON FILMS DEPOSITED WITH VHF-PECVD TECHNIQUE H.D. Yang1 (1.Department of Electronic Engineering, Jinan University, Guangzhou 510632, China) Abstract:Raman spectra and scanning electron microscope (SEM) techniques were used to determine the structural properties of microcrystalline silicon (μc-Si:H) films deposited on different substrates......
Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand moldDongrong LIU 1,2),Xiuhong KANG 1)*,Baoguang SANG 1) and Dianzhong LI 1) 1) Institute of Metal... reveal that some positive segregation patches are formed at the bottom of ingot.With the water-cooled copper tube inserted in the sand mold,the ingot cast has a less intensive......
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understand the melts behavior under ultrasonic, by using ammonium chloride solution, the simulation experiment was carried out and the temperature distribution in ingot with or without ultrasonic... generation in ingot start to occur with increasing the time of ultrasonic stirring. Key words: ultrasonic stirring; temperature distribution; ingot; grain refinement  ......
and failure analysis of zinc ingot die YANG Yuan-ping1, 2, YAN Hong-zhi1 (1. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China; 2. Department of Mechanical and Electrical Engineering, Xiangxi Vocational Technical College for Nationalities, Jishou 416000, China) Abstract: Aiming at breakage of zinc ingot die caused by fatigue crackle......
ANTIMONY INDUCED CRYSTALLIZATION OF AMORPHOUS SILICON I. Gordon1,O. Van Der Biest2,H.Z. Li3,Y. Wang4,P. Schattschneider5,G.M. Wu6,C.N. Yu4 (1.Development of Technique, Interuniversity Micro...) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can......