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用正电子湮没寿命谱仪测量和分析了Fe_(73.0)Cu_(1.0)Nb_(1.5)Mo_(2.0)Si_(13.5)B_(9.0)合金,该合金纳米晶化后有两类组织结构:一类是非晶结构,另一类是纳米晶结构;从缺陷形式上讲也有两种,一种是类空位,另一种是含有十来个单空位的空位团。类空位缺陷位于非晶区,空位团位于纳米晶区和晶粒的界面。Fe_(73.0)Cu_(1.0)Nb_(1.5)Mo_(2.0)Si_(13.5)B_(9.0)合金在非晶态时原子高密度区域与原子低密度稀释区域的分数之比约为1.44:1;纳米晶化后,经过480℃、500℃、540℃、580℃热处理,其类空位与空位团浓度的分数之比约为0.7:1。
The positron annihilation lifetime spectrometer was used to measure and analyze the Fe_ (73.0) Cu_ (1.0) Nb_ (1.5) Mo_ (2.0) Si_ (13.5) B_ (9.0) alloy. There are two types of microstructure after nanocrystallization: Class is amorphous structure, the other is the nanocrystalline structure; from the defect in terms of the form there are two, one is space-like space, and the other is containing a dozen single vacancy space group. Space-like defects in the amorphous region, vacancies in the nanocrystalline grain and grain interface. The ratio of the fraction of high density atoms to the low density regions of atoms in the amorphous state is about 1.44: 1 for the Fe_ (73.0) Cu_ (1.0) Nb_ (1.5) Mo_ (2.0) Si_ (13.5) B_ (9.0) After nanocrystallization, the ratio of vacancy to vacancy concentration is about 0.7: 1 after heat treatment at 480 ℃, 500 ℃, 540 ℃ and 580 ℃.