Effect of sintering temperature on microstructure and magnetic properties of 2∶17H type high-performance SmCo alloy

doi:10.13251/j.issn.0254-6051.2023.09.006

Abstract

Abstract: A 2∶17H type high-performance SmCo alloy was smelted in vacuum melting furnace. The effect of sintering temperatures of 1195, 1200, 1205, and 1210 ℃ on the magnetic properties and microstructure of the alloy magnets was studied. Then, the density and magnetic properties of the magnets with four sintering temperatures were tested, and the microstructure was characterized. The results show that the magnetic properties of the sintered magnets increase with the increasing sintering temperature appropriately, but greatly reduced due to excessively high sintering temperature. When the sintering temperature is 1205 ℃, the sintered magnet has the best comprehensive magnetic properties, with B_r of 11.41 kGs, H_cj of 1.05 kOe, (BH)_max of 7.365 MGOe. The magnetic properties of sintered magnets are affected by the element distribution, grain uniformity and size, magnet density, Sm₂O₃phase, and Zr-rich phase, respectively.

Key words: 2∶17H type high performance SmCo alloy, sintered magnet, sintering temperature, magnetic properties, microstructure

CLC Number:

MT273

Chen Yanrui, Lü Ke, Li Yan, Ren Shaoqing, Zhao Mingjing, Dong Rui, Ding Wei. Effect of sintering temperature on microstructure and magnetic properties of 2∶17H type high-performance SmCo alloy[J]. Heat Treatment of Metals, 2023, 48(9): 35-41.

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