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为了了解微晶合金中的缺陷变化情况,在以往工作的基础上,用正电子湮没Doppler展宽能谱仪测量了Fe_(70)Cr_(18)Mo_2Si_1B_9微晶合金原始薄带经不同温度处理、原始薄带破碎热压成块状材料及其在1000℃退火后的线形S参数。表明在该合金的原始薄带中存在三种类型的缺陷,热处理时缺陷大致分两步消除和减少(分别在室温至600℃和800℃至1000℃),热压成型过程中会给块状试样引进大量的缺陷,且不同工艺引进的缺陷量不等。成型过程中引进的缺陷相当稳定,即使1000℃退火都不能消除。
In order to understand the changes of the defects in the microcrystalline alloy, based on the previous work, the original strip of Fe 70 Cr 18 Mo 2 Si 1 B 9 microcrystal alloy was measured by positron annihilation Doppler broadening energy dispersive spectroscopy The strip is broken and hot pressed into a bulk material and its linear S-parameter after annealing at 1000 ° C. It shows that there are three types of defects in the original ribbon of the alloy. The defects are eliminated and reduced in two steps during heat treatment (from room temperature to 600 ℃ and from 800 ℃ to 1000 ℃, respectively) Sample introduction of a large number of defects, and the introduction of different processes vary in the amount of defects. The defects introduced during the forming process are quite stable, and can not be eliminated even at 1000 ° C.