Microstructural evolution and magnetic properties of Co-rich Hf-Co alloys

被引：5

作者：

Singh, Indeevar ^{[1
]}

Palit, Mithun ^{[2
]}

Basumatary, Himalay ^{[2
]}

Mathur, R. P. ^{[2
]}

Joseph, M. A. ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Mech Engn, Calicut 673601, Kerala, India

[2] Def Met Res Lab, Hyderabad 500058, Telangana, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 763卷

关键词：

Microstructure; Hf-Co alloy; Solidification sequence; Magnetic properties; PERMANENT-MAGNETS; PULL;

D O I：

10.1016/j.jallcom.2018.05.346

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：

Hf - Co binary alloys with different Hafnium concentration ranging from 12.5 to 20.5 at% have been prepared and characterized for structural attributes and magnetic properties. The alloy with 12.5 at% Hf exhibits a large volume fraction of soft magnetic alpha-Co( Hf), which impairs the hard magnetic properties. With increase of Hf concentration, the volume fraction of soft magnetic phase decreases with increase in fraction of HfCo7, leading to improvement of hard magnetic properties. The HfCo7 phase is found to be responsible for permanent magnetic behavior of the Co-rich Hf-Co binary alloys. The microstructural evolution has been unraveled through the understanding of solidification sequence and correlated with observed magnetic properties. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：742 / 748

页数：7

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