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利用液态金属X射线衍射仪对纯In熔体及In 1 %Cu熔体分别在 2 80℃、390℃、5 5 0℃、65 0℃、75 0℃进行了实验研究 ,获得了二者的衍射强度、结构因子、双体分布函数、径向分布函数以及平均最近邻原子间距、原子配位数 .结果表明 ,随温度由 2 80℃升高到 75 0℃ ,两种熔体的平均最近邻原子间距r1 和原子配位数Ns都呈现出减小的趋势 ,原子团簇都出现“热收缩”现象 ,加 1 %Cu后的熔体团簇热收缩程度较之纯In熔体大 .在整个测试温度区间内两种熔体的热收缩都不是均匀的 ,而是在某个温度区间发生突变 ,收缩明显 ,纯In熔体的突变区间为390℃～ 5 5 0℃ ,In 1 %Cu熔体的突变区间为 2 80℃～ 390℃ ,加 1 %Cu后突变区间向低温转移
The liquid-metal X-ray diffractometer was used to study the pure In 1% Cu and In 1% Cu melts respectively at 280 ℃, 390 ℃, 550 ℃, 65 0 ℃ and 75 0 ℃ Diffraction intensity, structure factor, bilayer distribution function, radial distribution function, mean nearest neighbor atomic distance and atomic coordination number.The results show that with the increase of temperature from 280 ℃ to 750 ℃, the mean of the two melts The atomic distance r1 and the number of atomic coordination Ns both showed a tendency of decreasing. The atomic clusters showed the phenomenon of “heat shrinkage”, and the melt shrinkage after 1% Cu addition was larger than that of the pure In melt. The thermal shrinkage of the two melts was not uniform throughout the test temperature range, but changed suddenly in a certain temperature range with significant shrinkage. The mutation range of pure In melt was 390-550 ℃, and In 1% Cu The mutation range of the melt was 280 ℃ ~ 390 ℃. After the addition of 1% Cu, the mutation range shifted to low temperature