MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Formation and Mechanical Properties of New Cu-Rich Cu-Zr-Al-Ag Glassy Alloys with High Glass-Forming Ability
Wei ZhangQingsheng ZhangAkihisa Inoue
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2009 Volume 50 Issue 3 Pages 679-682

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Abstract

We have discovered new Cu-rich Cu-Zr-Al-Ag bulk glassy alloys with high glass-forming ability and excellent mechanical properties. As the composition shifted to Cu-rich range in the Cu46+xZr46−xAg4Al4 alloy series, the supercooled liquid region, reduced glass transition temperature and γ value increased, leading to the improvement of the GFA. The full glassy samples with a diameter of 10 mm could be fabricated by copper mold casting for the Cu46+xZr46−xAg4Al4 (x=1–3) alloys. In addition to high GFA, the BGAs exhibit good mechanical properties under a compressive deformation mode, i.e., large Young’s modulus of 104–109 GPa, high fracture strength of 1905–1932 MPa and distinct plastic strain of 0.2–0.4%.

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© 2009 The Japan Institute of Metals and Materials
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