Cobalt-based bulk glassy alloy with ultrahigh strength and soft magnetic properties

被引：537

作者：

Inoue, A ^{[1
]}

Shen, BL

Koshiba, H

Kato, H

Yavari, AR

机构：

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

[2] Japan Sci & Technol Corp, Sendai, Miyagi 9808577, Japan

[3] Inst Natl Polytech Grenoble, CNRS, Thermodynam & Physicochem Met Lab, F-38402 St Martin Dheres, France

来源：

NATURE MATERIALS | 2003年 / 2卷 / 10期

关键词：

D O I：

10.1038/nmat982

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bulk metallic glasses-formed by supercooling the liquid state of certain metallic alloys-have potentially superior mechanical properties to crystalline materials. Here, we report a Co43Fe20Ta5.5B31.5 glassy alloy exhibiting ultrahigh fracture strength of 5,185 MPa, high Young's modulus of 268 GPa, high specific strength of 6.0x10(5) Nm kg(-1) and high specific Young's modulus of 31x10(6) Nm kg(-1). The strength, specific strength and specific Young's modulus are higher than previous values reported for any bulk crystalline or glassy alloys(1-3). Excellent formability is manifested by large tensile elongation of 1,400% and large reduction ratio in thickness above 90% in the supercooled liquid region. The ultrahigh-strength alloy also exhibited soft magnetic properties with extremely high permeability of 550,000. This alloy is promising as a new ultrahigh-strength material with good deformability and soft magnetic properties.

引用

页码：661 / 663

页数：3

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