Amorphization of Ge–GeSe mixtures in mechanical alloying process
Amorphization of Ge–GeSe mixtures in mechanical alloying process
复制标题
机械合金化过程中 Ge-GeSe 混合物的非晶化
DOI：
10.1016/s0022-3093(01)00850-x
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发表时间：
2001
影响因子：
3.5
通讯作者：
J. Hidaka
中科院分区：
文献类型：
--
作者：
Y. Shirakawa;Takuma Matsuda;Y. Tani;A. Shimosaka;J. Hidaka
行星式球磨机机械应力引起的结构变化已在 Ge-GeSe 共晶混合物中进行了研究。在当前条件下研磨27小时后，GeSe化合物完成非晶化。计算了非晶GeSe的对分布函数g(r)。最近邻 Ge-Se 距离为 2.37 Å，小于晶体 GeSe 的距离。共晶混合物中唯一的结晶GeSe相选择性地转变为非晶相。在目前的条件下，Ge-GeSe合金化并不是在原子水平上进行的，因为GeSe晶面间距的峰值位置在随研磨时间的变化中几乎是恒定的。评估了GeSe的(111)和(004)峰的积分强度的衰减率。与混合物中 GeSe 晶态-非晶态转变衰减率相关的非晶态转变能随着 GeSe 含量的降低而降低。
Structural changes by mechanical stress of a planetary ball mill have been investigated in Ge–GeSe eutectic mixtures. Amorphization of the GeSe compound was accomplished after 27 h of grinding under the present condition. Pair distribution function g(r) of the amorphous GeSe is calculated. The nearest neighbour Ge–Se distance is 2.37 Å, which is smaller than that of crystalline GeSe. The only crystalline GeSe phase in the eutectic mixtures selectively changes to the amorphous phase. Ge–GeSe alloying is not performed at the atomic level under the present condition, because the peak positions of interplanar spacings of GeSe are almost constant in the variation with grinding time. The decay rate of integrated intensities of (111) and (004) peaks of GeSe is evaluated. The amorphous transition energy related to the decay rate for the crystalline–amorphous transition of GeSe in the mixtures decreases with decreasing GeSe content.