Dy-Al-Ti三元合金系600℃等温截面研究  

Study on the Isothermal Section of the Dy-Al-Ti Ternary System at 600 ℃

作　　者：覃铭[1] 曾令宏[2] 卿培林[1] 刘淑辉[1] 

机构地区：[1]百色学院物理与电信工程系,百色533000 [2]柳州师范高等专科学校物理与信息科学系,柳州545004

出　　处：《表面技术》2012年第5期81-84,共4页Surface Technology

基　　金：广西教育厅科研项目(200911MS226);广州大学-百色学院合作科学研究项目(GBK2010007)

摘　　要：采用真空电弧炉熔炼和真空管退火,制得Dy-Al-Ti三元合金试样,通过X射线衍射(XRD)分析,并辅以差热分析(DTA)、扫描电子显微镜(SEM)分析、能谱仪(EDS)分析等测试技术,对实验样品进行表征,研究了Dy-Al-Ti三元合金系600℃等温截面中的物相关系,确定了Dy-Al-Ti三元系600℃等温截面的两相、三相区边界以及固溶度,并构建了Dy-Al-Ti三元系600℃等温截面相图。研究结果表明,Dy-Al-Ti三元系600℃等温截面由14个单相区、27个两相区和14个三相区组成,并证实了两个三元化合物相Ti4Al43Dy6和Ti2Al20Dy在600℃的存在。The Dy-A1-Ti ternary alloys were melted in a vacuum arc furnace and then were annealed in a vacuum tube. By means of X-ray powder diffraction with the aid of differential thermal analysis and metallographic microstruc-ture analysis, the test sample was characterized and the phase relationship in the Dy-A1-Ti ternary system at 600 ℃ was investigated. Then the boundary of two-phase regions and three-phase regions of islthermal section of Dy-A1-Ti ternary system and its solid solution degree were determined at 600 ℃ The isothermal section phase diagram of Dy-A1-Ti terna-ry system was structured. The results show that this ternary system at 600 ℃ contains 14 single-phase regions, 27 two-phase regions and 14 three-phase regions. Two ternary compounds Ti4 A143 Dy and Tia A120 Dy are confirmed in this system at 600 ℃.

关 键 词：相图 X射线衍射 Dy-Al-Ti三元系 等温截面 

分 类 号：TG113.12[金属学及工艺—物理冶金]