Glass formation in La-based La-Al-Ni-Cu-(Co) alloys by Bridgman solidification and their glass forming ability
Journal Article
·
· Acta Materialia
- National Univ. of Singapore (Singapore)
Six La-based La-Al-Ni-Cu-(Co) alloys were subjected to a systematical study of glass formation by Bridgman unidirectional solidification at growth velocities between 0.1 and 4.82 mm/s at a temperature gradient of 15 K mm. With increased Cu content the critical growth velocity for glass formation in La{sub 55}Al{sub 25}Cu{sub 20{minus}x}Ni{sub x} (x = 0--20) alloys shows a steep minimum at 10 at.% Cu, indicating the largest glass forming ability for the La{sub 55}Al{sub 25}Ni{sub 10}Cu{sub 10} alloy. Critical cooling rates for glass formation in the present alloys were also obtained through a study of their melting and solidification behaviors by thermal analytical measurement. The effect of alloying addition and the significance of reduced glass transition temperature for the glass forming ability of these alloys is discussed.
- OSTI ID:
- 357934
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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