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用透射电镜,X射线衍射,Kerr磁光效应,磁性测量的方法研究了Sm(Co,Cu,Fe,Zr)7.4合金在等级时效过程中矫顽力的可逆变化和显微组织结构以及畴结构。在第一级时效后在合金中就形成了胞状组织,胞内是2:17型相,胞壁为1:5型相。在随后降低温度的等级时效后,虽然矫顽力由2.8KOe提高到5.4KOe,但胞状组织的基本特徵没有变化,矫顽力随时效温度可逆地变化,矫顽力的提高可能与两相畴壁能差的增加有关,可以认为等级时效过程主要是由原子扩散的过程来决定的。
The reversible change of coercivity and the microstructure and domain structure of Sm (Co, Cu, Fe, Zr) 7.4 alloy during the aging process were investigated by transmission electron microscopy, X-ray diffraction, Kerr magneto-optical effect and magnetic measurement . After the first stage of aging in the alloy formed in the cellular structure, intracellular is 2:17 phase, the cell wall is 1: 5 phase. Although the coercive force increased from 2.8 kOe to 5.4 kOe after the aging with subsequent temperature lowering, the basic characteristics of the cellular structure did not change. The coercivity changed reversibly with the aging temperature. The coercive force could increase with the two-phase domains The increase in wall energy difference is related to the level aging process can be considered mainly by the atomic diffusion process to decide.