New Fe-Cr-Mo-(Nb, Ta)-C-B glassy alloys with high glass-forming ability and good corrosion resistance

被引：91

作者：

Pang, SJ ^{[1
]}

Zhang, T ^{[1
]}

Asami, K ^{[1
]}

Inoue, A ^{[1
]}

机构：

[1] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS TRANSACTIONS JIM | 2001年 / 42卷 / 02期

关键词：

metallic glass; iron-based alloy; glass transition; supercooled liquid region; reduced glass transition temperature; corrosion resistance; passivity;

D O I：

10.2320/matertrans.42.376

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New Fe-based glassy alloys of Fe45Cr16Mo16C18B5 Fe45Cr16Mo14Nb2C18B5 and Fe5Cr16Mo14Ta2C18B5 were synthesized. They exhibit a large supercooled liquid region (DeltaT(x)) reaching 58 K before crystallization and high reduced glass transition temperatures (T-g/T-m) up to 0.62. These values indicate that these Fe-based alloys have a glass-forming ability which is high enough to enable die formation of bulk glassy alloys. The Fe-based glassy alloys have high corrosion resistance in 1, 6 and 12 mol L-1 HCl solutions at room temperature. HCl corrosion rates are in the range of 10(-4)-10(-2) mm.y(-1). The glassy alloys are spontaneously passivated in 1 and 6 mol.L-1 HCl solutions with wide passive region and low passive current density in the range of 10(-4)-10(-2) A.m(-2). No pitting corrosion is seen even in 12 mol.L-1 HCl solution. The addition of Nb or Ta to the glassy alloys is effective on enhancing the corrosion resistance.

引用

页码：376 / 379

页数：4

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