MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
New Cu-Zr-Al-Nb Bulk Glassy Alloys with High Corrosion Resistance
Chunling QinWei ZhangHisamichi KimuraKatsuhiko AsamiAkihisa Inoue
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2004 Volume 45 Issue 6 Pages 1958-1961

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Abstract

New Cu-based bulk glassy alloys with good mechanical properties were formed in Cu-Zr-Al-(Nb) system by copper mold casting. They exhibit a large supercooled liquid region (ΔTx) of 50 K-74 K and high glass-forming ability with maximum diameters of 2.0 mm-3.0 mm. The addition of Nb to the glassy alloys is effective for improving the corrosion resistance in all the solutions. The corrosion rate of the 5 at% Nb alloy decreases by one order of magnitude compared to those of the 0 at% Nb alloys in 3 mass% NaCl solution. In 0.5 mol·dm−3 H2SO4 solution, the Cu-Zr-Al-(Nb) alloys are passivated in wide passive region and low passive current density of the order of 10−2 A·m−2, indicating high corrosion resistance in this solution.

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© 2004 The Japan Institute of Metals and Materials
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