GUO Shuqi HAN Guihuan YAO Zhongkai Harbin Institute of Technologh
,
Harbin
,
China YAO Zhongkai Dept.of Metals and Technology
,
Harbin Institute of Technology
,
Harbin
,
China
金属学报(英文版)
This paper presents an investigation on the microstructures and properties of the 17v.-% SiCw/Al-12Si composites.TEM observations and EDAX analysis revealed that Al diffuses into the SiC whiskers and that dislocations exist at the whisker/matrix interfaces. Tensile test results showed that the isothermal exposure and thermal cycle at both 573K and 733 K caused the UTS reduction of the composites,and the reduction in UTS due to thermal exposure at 733 K was much more significant than that due to thermal cycle at the same tem- perature.The SiC_W/Al-12Si composites were also found to have exellent wear resistance, which does not seem to vary much with the volume content of whiskers in the ronge of 11— 17%.
关键词:
composites
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null
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null
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null
LIANG Yong LI Ruiguo Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
ChinaInstitute of Corrosion and Protection of Metals
,
Aademia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英）
Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.
关键词:
laser
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null
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null
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null
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null
杨金瑞
,
余尚先
,
顾江楠
高分子材料科学与工程
通过对resol(羟甲基酚化合物和低分子量羟甲基酚树脂)DEPT135图谱的分析讨论,得到一系列计算resol微细结构参数的经验公式.根据DEPT135图谱可判断是否发生缩聚反应,根据经验公式可计算酚单体各个活性点参与反应百分率或酚羟基导入率、不同类型缩聚所占百分率及低分子量羟甲基酚树脂的平均核体数.
关键词:
羟甲基酚化合物
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羟甲基酚树脂
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DEPT135
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结构参数
