Grain refining potency of LaB6 on aluminum alloy

被引：40
|
作者：
Li Pengting [1 ]
Tian Wenjie [1 ]
Wang Dong [1 ]
Liu Xiangfa [1 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2012年 / 30卷 / 11期
基金：
中国国家自然科学基金;
关键词：
LaB6; crystal structure; grain refinement; Al alloy; rare earths; REFINEMENT; MICROSTRUCTURE; MODEL;
D O I：
10.1016/S1002-0721(12)60200-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Al-LaB6 alloy was successfully prepared by aluminum melt reaction method. Microstructure analysis of this alloy was carried out by field emission scanning electron microscopy (FESEM), Raman spectroscopy and transmission electron microscopy (TEM). It was found that cubic LaB6 particles were highly dispersed in aluminum matrix with a uniform edge length of about 4.5 mu m. Grain refining potency of LaB6 on commercial pure aluminum was also investigated. It was shown that LaB6 could act as an effective and stable nucleation substrate for alpha-Al during solidification process, due to their crystallographic similarity. The coarse grains of commercial pure aluminum were obviously refined to small equiaxed ones by addition of 0.5% Al-5LaB(6) alloy at 720 degrees C.
引用
收藏
页码：1172 / 1176
页数：5
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