Landolt-Börnstein - Group III Condensed Matter

7.2.1.5.3.1 Introduction

Abstract

This chapter provides an introduction to the discussion on Fe-Cr-Co base magnet alloys. This alloy system has an α (bcc) phase at high temperatures and it decomposes into two bcc phases, α1+ α2, as the result of a suitable heat treatment. Since the α1 phase is rich in Fe and Co, it is ferromagnetic, whereas the α2phase is rich in Cr and is non-magnetic. This system is therefore potentially a basis for high-quality permanent magnets, similar to the Fe-Ni-Al base alloys and the Fe-Cr-Co magnets are ductile. The conventional magnet preparation technique consists in general of several steps including a homogenization process at about 900-1000°C of the cast specimen, thermomagnetic or deformation heat treatment at ≈ 650°C followed by some type of aging procedure at lower temperatures.

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Title
7.2.1.5.3.1 Introduction
Book Title
Magnetic Alloys for Technical Applications. Hard Magnetic Alloys
In
7.2.1.5.3 Fe-Cr-Co base magnet alloys
Book DOI
10.1007/b41058
Chapter DOI
10.1007/10028076_21
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
19I2
Editors
  • H. P. J. Wijn
  • Authors
  • T. Nakamichi
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