期刊
PHILOSOPHICAL MAGAZINE
卷 92, 期 6, 页码 655-665出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2011.630692
关键词
metallic glass; glass formability; aluminum-gold alloy
类别
资金
- US Department of Energy, Office of Basic Energy Sciences, Materials Science and Engineering Division
- World Premier International Research Center (WPI) Initiative for Atoms, Molecules and Materials
- Global COE, Materials Integration Center of Education and Research, Tohoku University, MEXT, Japan
The aluminum-gold system exhibits various features that suggest high glass formability, such as a deep eutectic, formation of icosahedral clusters in the intermetallic compound near the eutectic minimum and a strongly negative heat of mixing. However, it is very difficult to form a glass with this system. Various issues related to glass formability are discussed using the Al-Au system as a negative test-case. In particular, the atomic level pressure was calculated from first principles for the first time for Al2Au, AlAu2 and AlAu4 intermetallic compounds. The atomic level pressure is very high in these compounds, suggesting frustrated electronic states which destabilize both crystalline and glassy phases.
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