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一、引言 众所周知,SmCo_5从～900℃急冷后,具有很高的矫顽力,而在～700℃回火后却显著地下降。但产生这种效应的原因至今还没有完全搞清楚。多数人认为这是由于SmCo_5分解出Sm_2Co_(17)相的结果。其主要的依据是2:17相的磁晶各向异性常数比1:5相低一个数量级;
I. Introduction As we all know, SmCo_5 from ~ 900 ℃ quenching, with high coercivity, but after tempering ~ 700 ℃ decreased significantly. However, the reason for this effect has not yet been fully understood. Most people think this is due to SmCo_5 decomposition of Sm_2Co_ (17) phase results. The main basis is that the magnetic crystal anisotropy constant of 2:17 phase is one order of magnitude lower than that of 1: 5 phase.