XU Haigang ZHU Jing YUAN Hong Central Iron and Steel Research Institute
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Ministry of Metallurgical Industry
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Beijing
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ChinaNING Xiaoguang YE Hengqiang Laboratory of Atomic Imaging of Solids
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Institute of Metal Research
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Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
The morphology,crystal defects and chemical compositions of surfaces in two kinds of SiC whiskers related to their growth mechanism have been studied by means of electron microscopy and surface chemical analyses.Based upon the experimental results,five criteria for evaluating the whisker microstructure were suggested as:proportion of the perfect single crystals,morphology and dimensions,defects and their distribution,the bulk and surface chemistries,and crystallographic characteristics.
关键词:
SiC
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PAN Jin Changsha Institute of Technology
,
Changsha
,
ChinaNING Xiaoguang YE Hengqiang Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
The Si_3N_4 whisker reinforced 6061Al composite with bending strength of 790 MPa was prepared by squeeze casting process.After heat-treatment under T6 regime i.e.530℃, 1 h solutioning and 160℃,24 h aging,an increment in strength and microhardness may be over 20% and 28% respectively,The microstructures of Si_3N_4 whisker and Si_3N_4/Al interface were observed by meas of HRTEM.The relation between interracial structure and composite properties was discussed.
关键词:
β-Si_3N_4 wthisker
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null
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