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; hot extrusion; Al-Si alloy 高硅铝合金作为电子封装材料, 其质量仅为传统金属基W-Cu电子封装材料的六分之一, 且高硅铝合金具有很好的热导性能, 线膨胀系数可控[1], 能与电路板广泛使用的半导体材料相匹配, 因此, 作为基片衬底, 机壳及盖板等材料可保证电子器件在使用过程中不致受热或开裂而过早失效. 高硅铝合金电子封装材料, 代表了新型轻质封装材料的发展方向.... 复合变质对过共晶高硅铝合金组织和性能的影响[J]. 中国有色金属学报, 2002, 12(增刊1): 107-110. ZHANG Jin-shan, XU Chun-xiang, HAN Fu-yin, Effect of composite modifier on structures and properties of hypereutectic Al-Si alloy[J......
were studied by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Comparatively, the wear properties of a hypereutectic Al-Si aluminium alloy under the same condition... in Mg-10Y-4Gd-1.5Zn-0.4Zr alloy plays an important role in the wear rate. Key words: Mg-Y-Gd-Zn-Zr alloy; sliding wear; wear rate; wear mechanism; hypereutectic Al-Si alloy 1 Introduction Magnesium and its......
and micro cracks in Al-Si alloy at different temperatures 图5 Al-Si在不同温度下拉伸的真实应力-应变曲线 Fig. 5 True stress-strain curve of Al-Si alloys at different temperatures 式中:n为滑移面上的位错数量;b为柏氏矢量;为泊松比;μ为剪切模量... alloy 图8 Al-Si合金在不同温度下的裂纹扩展示意图 Fig. 8 Schematic illustration of crack extension in Al-Si alloys at different temperatures Al-7Si-0.3Mg合金在室温环境的拉伸过程中Si相破裂形成应力集中,并产生局部变形形成韧窝(见图8(c)).随着温度的降低,合金......
University of Science and Technology, Wuhan 430074, China) Abstract: The hypereutectic Al-Si alloy A390 slurry was prepared by ultrasonic vibration and rheo-diecasted at different temperatures, and the effect of slurry pouring temperature on the microstructure and mechanical properties of hypereutectic Al-Si alloy rheo-diecasting sample was investigated. The results show that, the primary Si......
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-Si alloy; preferential orientation; continuous unidirectional solidification 1 Introduction Al-Si alloy wires are widely used as bonding wires in integrated electrical circuits because... f1, Φ, and f2 [8-10]. 3 Results and discussion 3.1 Crystal orientations at beginning of CUS process At the beginning of solidification the microstructure of Al-Si alloy rod (sample 1) is shown......
Solidification structure of eutectic Al-Si alloy under a high magnetic field-aid-electromagnetic vibration Yunbo ZHONG1,Kang DENG1,Weili REN1,Zhongming REN1,Jianbo YU1 (1.Department of Materials... words:Strong magnetic field; Electromagnetic vibration; Eutectic solidification; Polyhedral Si; Al-Si alloy; [全文内容正在添加中] ......
) Abstract: Al Si alloy and metal zinc were selected as the samples to study the effects of atomization parameters on mean particle size, particle size distribution and particle morphology...化粉末较细,且粒度分布较窄,表现为粉末质量积累曲线往左下方偏移. 表2采用不同固体介质时Al Si粉末的平均粒度 Table 2 Mean particle size of AF Si alloy powder atomized with different solid media 图6不同固体介质雾化Al Si粉末粒度分布 Fig.6 Effect......
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