Overview of composition and technique process study on 2∶17-type Sm-Co high-temperature permanent magnet

• 作者: Chao Wang Ming-Gang Zhu
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: REVIEWS
• 页码范围: 790-798
• 页数: 9页
• 语种: 英文

摘要

Sm-Co permanent magnets are widely used in aerospace equipments,tubes,sensors and hybrid electric vehicles due to their excellent magnetic properties at both room and high temperatures.Compared to that of Nd-Fe-B magnets,the capability of reliably operating at temperatures up to 500 ℃ is the biggest preponderance of Sm-Co permanent magnets.However,the reliable high-temperature magnetic properties are susceptible to composition and technique processes.So,appropriate composition and matched technique processes are prerequisites for good high-temperature magnetic properties.This review mainly emphasizes the influences of Sm,Fe,Cu and Zr contents and technique processes on development of high-temperature performance and discusses the controversial hightemperature coercivity mechanism of 2∶17-type high-temperature Sm-Co magnets.