Promoted nucleation of potent substrates assisted with Al-10Si-2Fe master alloy in Al-Si alloys

被引：8
作者：
Yu, Wenhui [1 ]
Zhang, Yong [1 ]
Jiang, Aolei [1 ]
Yan, Tingliang [1 ]
Tian, Yu [1 ]
Zheng, Hongliang [1 ,2 ]
Lin, Xiaohang [1 ]
Tian, Xuelei [1 ]
机构：
[1] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China
[2] Norwegian Univ Sci & Technol NTNU, Dept Mat Sci & Engn, N-7491 Trondheim, Norway
来源：
MATERIALS LETTERS | 2017年 / 207卷
基金：
中国国家自然科学基金;
关键词：
Cast; Aluminum alloys; Thermal analysis; Microstructure; Crystal nucleation; GRAIN-REFINEMENT; HETEROGENEOUS NUCLEATION; TENSILE PROPERTIES; SILICON; MECHANISM; ALUMINUM; BEHAVIOR; MICROSTRUCTURE; INOCULATION; PHASES;
D O I：
10.1016/j.matlet.2017.06.128
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cluster-assisted crystallization induced by Al-10Si-2Fe master alloy was investigated in Al-Si melts assisted with exogenous nucleation substrates. Al-Si-Fe master alloy can enhance nucleation immensely with the existence of AlP in high purity alloys and TiB2.AlP particles in commercial purity Al-Si alloys. TiB2 particles themselves in high purity alloys cannot cooperate with Al-10Si-2Fe master alloy and leave the alloys deep undercooling. In addition, swells on silicon surfaces provide the evidence of pre-nucleation clusters attachment during silicon crystallization. Conclusively, Al-10Si-2Fe master alloy can only function with abundant nucleation substrates and make more of them effective by alerting the crystallization of the Al- Si melts. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：93 / 95
页数：3
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