MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Effects of Additional Hf on the Thermal Stability and Mechanical Properties of Cu-Zr-Ag Bulk Glassy Alloys
Fei JiaWei ZhangAkihisa Inoue
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2006 Volume 47 Issue 8 Pages 1922-1925

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Abstract

The thermal stability, crystallization behavior and mechanical properties of the Cu45Zr45−xHfxAg10 (x=0 to 45 at%) glassy alloys have been investigated. The glass transition temperature (Tg), crystallization temperature (Tx), liquidus temperature (Tl) and the supercooled liquid region ΔTx (=TxTg) increase with increasing Hf content. The reduced glass transition temperature (TgTl) values are in the range from 0.54 to 0.59. The Vicker’s hardness (HV), Young’s modulus (E) and compressive fracture strength (σc,f) of the Cu45Zr45−xHfxAg10 (x=0 to 25 at%) bulk glassy alloys increase linearly with increasing Hf content and reach the maximum values of 554, 123 GPa and 2020 MPa, respectively, for Cu45Zr20Hf25Ag10 alloy. A different crystallization behavior is observed for Cu45Zr45Ag10 and Cu45Hf45Ag10 glassy alloys.

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© 2006 The Japan Institute of Metals and Materials
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