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; 文章编号:1672-7207(2015)11-4028-06 Effects of Cu and Si on conductivity of Al-Si alloys through lattice distortion measurement LI Bin1, YANG Zhao1, 2, YANG...: The effects of Cu and Si on the lattice constant and electrical properties of Al-Si alloys were investigated by conductivity measurement, optical microscope, scanning electron microscope(SEM) and X-ray......
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and content of silicon phase on CTE of Al-Si alloys WU Yu-ying1, LIU Xiang-fa1, DAI Yong2, JIANG Bing-gang3, BIAN Xiu-fang1 (1. Key Laboratory of Materials Liquid Structure and Heredity, Ministry..., Shandong University, Ji’nan 250061, China) Abstract: The linear coefficient of thermal expansion (CTE) of Al-Si alloys was studied by using Hi-scope video microscope and DIL 402C high temperature......
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curve of as-cast Al-Si alloys 2.2 铸态Al-Si合金的显微组织 图2所示为Al-12%Si与Al-18%Si合金铸态的金相照片.从图2可以看出,材料主要由灰白色,深灰色两个相组成,其中灰白色部分为α(Al)相,深灰色为Si相.根据形态特征,Si相中深灰色长条状,短棒状部分为共晶Si,长径比多大于3;深灰色块状,球状部分为初生Si.铸态下的共晶硅为纤维长条状...;Metallurgical structures of as-cast Al-Si alloys 图3 铸态Al-Si合金的SEM像 Fig. 3 SEM images of as-cast Al-Si alloys 2.3 高温热暴露中Al-Si合金的微观组织演变 图4所示为合金经过不同温度(250,350,450,550 ℃)保温2 h后粗糙度变化规律演变,按照表面粗......
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