The 500°C isothermal section of the Al–Dy–Ti ternary system

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• 作者：Zhou ; Huaiying ; Liu ; Weifang ; Yuan ; Songliu ; Yan ; Jialin
• 关键词：Rare earth compounds ; Transition metal compounds ; Crystal structure ; X-ray diffraction ; Phase diagram
• 刊名：Journal of Alloys and Compounds
• 出版年：2002
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：April 18, 2002
• 卷：336
• 期：1-2
• 页码：218-221
• 文件大小：499 K

摘要

The phase relations in the Al–Dy–Ti ternary system at 500°C were investigated by powder X-ray diffraction (XRD), differential thermal analysis (DTA), optical microscopy and scanning electron microscopy (SEM) techniques. The existence of two ternary compounds DyTi₂Al₂₀ and Dy₆Ti₄Al₄₃ were confirmed. The 500°C isothermal section of this ternary system consists of 14 single-phase regions, 27 two-phase regions and 14 three-phase regions. At 500°C, the maximum solid solubilities of Ti in Dy₂Al, Dy₃Al₂ and DyAl₂ is about 2.1at.%, 3.6at.%, 16.5at.%, respectively, and that of Dy in Ti, Ti₃Al, TiAl is less than 1at.%.