Alloying effects of the elements with a positive heat of mixing on the glass forming ability of Al-La-Ni amorphous alloys

被引：3

作者：

Chen ZiPan ^{[1
]}

Gao JingEn ^{[1
]}

Wu Yuan ^{[1
]}

Wang Hui ^{[1
]}

Liu XiongJun ^{[1
]}

Lu ZhaoPing ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2014年 / 57卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Al-based; glass-forming ability; positive heat of mixing; metallic glass; BULK METALLIC GLASSES; THERMAL-STABILITY; ADDITIONS; LIQUID;

D O I：

10.1007/s11433-013-5253-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of Sn and Ga additions on the glass forming ability (GFA) of (Al86La5Ni9)(100-x) Sn (x) (x=0, 0.2, 0.3, 0.5, 0.7, 1 and 2 at.%) and (Al86La5Ni9)(100-x) Ga (x) (x=0, 0.2, 0.5, 1 and 1.5 at.%) alloys were systematically investigated. Unlike common microalloying methods, both Sn and Ga have a positive heat of mixing with the main component of Al. Our analysis confirmed that proper Sn addition can suppress the strong formation of alpha-Al and enhance the GFA due to the positive heat of mixing between Sn and Al and the large difference in their atomic sizes. While the addition of Ga to the base alloy acted as the nucleation cites for alpha-Al and accelerated precipitation of the alpha-Al phase, thus deteriorating the GFA.

引用

页码：122 / 127

页数：6

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