Cluster-Based Bulk Metallic Glass Formation in Co (-Fe)-Si-B-Nb Alloy Systems

Abstract:

The present paper investigates the bulk metallic glass formation in Co-based alloy systems with the guidance of the cluster line and minor-alloying principles. The selected basic ternary Co-B-Si alloy compositions are intersecting points of cluster lines, defined by linking special binary clusters to the third element. Then these basic ternary alloys are further minor-alloyed with Nb and quaternary bulk metallic glasses are obtained only by 4-5 at. % Nb minor-alloying of the basic composition Co68.6B25.7Si5.7 that is developed from dense-packed cluster Co8B3. The bulk metallic glasses are expressed approximately with a unified simple composition formula: (Co8B3)1(Si,Nb)1. In addition, a quantity of Fe substitution for Co further improves the glass-forming abilities.

• Periodical: Materials Science Forum (Volumes 561-565)
• Pages: 1275-1278
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.561-565.1275
• Online since: October 2007
• Authors: Qing Wang, Chun Lei Zhu, Yan Hui Li, Jiang Wu, Chuang Dong, Jian Bing Qiang, Wei Zhang, Akihisa Inoue
• Keywords: Bulk Metallic Glass (BMG), Cluster, Co(-Fe)-Si-B-Nb Alloys, Compositional Design

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