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摘要: 通过穆斯堡尔谱、透射电镜、x射线和磁测量等手段研究了将普通FeCrCo合金中Cr,Co元素含 量提高、并加入Mo,Zr元素后合金矫顽力的变化，发现其值76kA/m比普通值40—52kA/m高50% 以上.对该合金不同热处理阶段的穆斯堡尔谱的测试表明，合金的微观结构与普通FeCrCo合 金有显著的不同.固溶处理后合金单相性好，不产生对磁性起破坏作用的γ相；磁场热处理 过程中，发生原子的重新排布，α2相开始出现，两相结构基本确定；分级回火 后，调幅 分解进行得更彻底，合金内部完全形成调幅结构，与低矫顽力合金相比，铁磁性的α1 相更容易形成.
Abstract: Variation of the coercivity induced by increasing Cr and Co contents and adding inpurities of Mo and Zr in FeCrCo alloys was investigated using Mssbauer spec tra, fransmission electron microscopy, x-ray diffraction, and magnetic measureme nt. A coercivity as high as 76kA/m is obtained, which is one and half times high er than that (40—52kA/m) of the common alloy. Mssbauer spectra shows that the microstructure of the high-coercivity alloy is apparently different from that of the traditional FeCrCo alloy. The alloy is single-phase after solution treat ment, the non-magnetic γ phase, which weakens the magnetic properties, does no t appear. During the thermomagnetic treatment, the atomic distribution is rearra nged, and leads to the formation of the α2 phase, the spinodal struc ture with the two-phase (α1 +α2 ) in the alloy fully forms after step-tempering. It might be beneficial for forming the high coercivity in alloy. Comparied with th e low-coercivity case, more of the α1 phase exist in the spinodal st ructure.
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