Volume sequences of characteristic atoms separated from ezperimental volumes of AuCu and AuCu3 compounds

摘要：

The systematic science of alloys (SSA) is a framework of the total energy and total volume able to be separated.The volume sequences of characteristic atoms at the central sites of the basic clusters in the fcc-based Au-Cu system are separated out from the experimental volumes of L10-AuCu and L12-AuCu3 compounds at room temperature only,by nine volume V-functions.From these volume sequences,the volumes,volumes of formation,ordering (excess) volumes and volume mismatch degrees of the L10-AuCu,L12-AuCu3 and L12-Au3Cu compounds,Au3Cu-,AuCu-and AuCu3-type ordered alloys with maximal ordering degree,and disordered Au1-xCux alloys are calculated.Among these functions,only ordering volumes of the compounds and ordered alloys obtained by the 6th V-function are negative,I.e.,the destruction of the superlattice is accompanied by an increase in volume,which is identical with the experimental results.Accompanying conclusions,the different descriptions of volumetric properties between traditional alloy theories and SSA framework are discussed.

关键词： systematic science of alloys Au-Cu system atomic volume volume of formation ordering volume volume mismatch

作者: XIE You-qing LIU Xin-bi LI Xiao-bo PENG Hong-jian NIE Yao-zhuang

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China;Powder Me School of Materials Science and Engineering,Central South University,Changsha 410083,China College of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China

会议类型: 国际会议

会议名称: 2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)

会议地点: 长沙

会议语种:英文

页码: 1599-1617

在线出版日期: 2009-11-22（万方平台首次上网日期，不代表论文的发表时间）