采用透射电镜(TEM)、场发射扫描电镜(FESEM)、X射线衍射(XRD)等方法系统研究Sm(CobalFe0.108Cu0.131Zr0.042)7.0在830℃时效处理10～30h过程中的微结构演变及磁性能.结果表明:合金时效处理后形成由菱方Sm2Co17R主相和六方Sm(Co,Cu)5胞壁相构成的胞状结构、叠加在胞状结构之上的六方富Zr片状结构和少量富Zr的Sm(CoCuFeZr)x析出相.随830℃时效处理时间由10h延长到30 h,Sm2Co17R主相的尺寸由80～110 nm长大到150 nm,富Zr片状相的密度增大,富Zr的Sm(CoCuFeZr)x析出相的体积分数增多.富Cu的SmCo5胞壁相和富Zr的Sm(CoCuFeZr)x析出相通过钉扎畴壁为合金提供高的室温和高温矫顽力.磁性能测试结果表明:剩磁研随830℃时效时间的延长而单调增大,内禀矫顽力Hci在830℃处理20 h时达最大值2417.9kA/m,在测试温度为500℃时仍具有高的Hci,为693.5 kA/m.
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