Pd基大块金属玻璃过冷液相区与键参数的关系  

Relationship between Supercooled Liquid Region and Bond Parameters of Pd-Based Bulk Metallic Glasses

作　　者：方守狮[1] 肖学山[1] 王庆[1] 夏雷[1] 董远达[1] 

机构地区：[1]上海大学,上海200072

出　　处：《稀有金属材料与工程》2004年第11期1132-1135,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(50201009; 50031010)

摘　　要：通过计算机对 Pd 基大块金属玻璃的过冷液相区宽度 ?Tx 的表达式进行回归处理分析,得到 Pd 基大块金属玻璃过冷液相区 ?Tx 与反映合金混合热变化的 3 个键参数(电负性差 ?X、原子尺寸差的百分数 δ 和电子浓度 n )之间存在如下关系:?Tx=–29.369 09+3 602.458 98(?x)2+9 992.767 58 δ2–3.958 97 n2/3,相关系数为 97.2%。?Tx 随多元合金的电负性差和原子尺寸差的百分数的增加而增加,而随电子浓度的增加而略有降低。The regression analysis of the expression of supercooled liquid region DeltaT(x) for Pd-based bulk metallic glass was conducted by computer. It was obtained that the supercooled liquid region of Pd-based bulk metallic glass has close relation with their bond parameters, which can be expressed by the follow equation with a relative coefficient 97.2%: DeltaT(x) = 29.369 09+3 602.458 98(Deltax)(2)+9 992.767 58 delta(2) 213 -3.958 97n(2/3), It can be seen from the equation that the values of DeltaT(x) increase with increasing the electronegativity and atomic size parameter difference of the alloys while they decrease very little with increasing electron density.

关 键 词：大块金属玻璃 过冷液相区 电负性差 原子尺寸因素 电子浓度 

分 类 号：TG139.8[一般工业技术—材料科学与工程]