Experimental investigation of the Al–Y phase diagram
Experimental investigation of the Al–Y phase diagram
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DOI：
10.1016/j.jallcom.2005.06.078
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发表时间：
2006-04
影响因子：
6.2
通讯作者：
Shuhong Liu;Yong Du;Hong-hui Xu;C. He;J. Schuster
中科院分区：
文献类型：
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作者：
Shuhong Liu;Yong Du;Hong-hui Xu;C. He;J. Schuster
用差热分析、X射线衍射、光学显微镜和扫描电子显微镜及能谱分析等方法对16种关键合金的Al-Y相图进行了重新研究。结果表明，合金中存在Al 3 Y、Al 2 Y、AlY、Al 2 Y3和AlY 2五种金属间化合物相。Al_2Y和Al_2Y_3分别在1490±2 ° C和1105±2°C熔化。Al 3 Y、AlY和AlY 2分别在980±2°C、1138±2°C和977±2°C通过包绕反应L+ Al 2 Y惠Al 3 Y、L+ Al 2 Y惠AlY和L+ Al 2 Y3惠AlY 2生成。在637±2°C下观察到L惠（Al）+Al_3 Y，在1081±2°C下观察到L惠AlY+ Al_2 Y_3，在955±2°C下观察到L惠AlY_2+（αY）三种共晶反应。未发现Al_3Y_5、AlY_3化合物，主要根据实验结果提出了修正的Al-Y相图。
The Al–Y phase diagram has been reinvestigated with 16 key alloys over its whole composition range by means of differential thermal analysis, X-ray diffraction, optical microscopy, and scanning electron microscopy with energy dispersive X-ray techniques. The existence of five intermetallic phases, Al3Y, Al2Y, AlY, Al2Y3, and AlY2, has been confirmed. Al2Y and Al2Y3melt congruently at 1490±2 and 1105±2°C, respectively. Al3Y, AlY, and AlY2are formed via the peritectic reactions L+Al2Y⇔Al3Y at 980±2°C, L+Al2Y⇔AlY at 1138±2°C, and L+Al2Y3⇔AlY2at 977±2°C, respectively. Three eutectic reactions L⇔(Al)+Al3Y at 637±2°C, L⇔AlY+Al2Y3at 1081±2°C, and L⇔AlY2+(αY) at 955±2°C, are observed. The previously reported Al3Y5, AlY3compounds were not found. A revised Al–Y phase diagram is presented mainly based on the present experimental results.