Abstract

X-ray diffraction and Mössbauer spectroscopy are used to study solid-phase reactions that occur in Fe–Cr nanocrystalline alloys during heat treatment. Upon the isochronous annealing of mechanically alloyed Fe–Cr powders, the nanostructural state is retained for all samples up to a temperature of 700°C. Fe(80)Cr(20) alloy tends to separate throughout the range of annealing temperatures. The annealing of all samples in the temperature range of 400–500°C results in separation into iron-enriched and chromium-enriched regions. A change in the trend toward short range ordering is observed in the samples of Fe(70)Cr(30) and Fe(60)Cr(40) at annealing temperatures above 500°C. Annealing samples of Fe(52)Cr(48) at temperatures above 600°C results in the formation of the σ-phase.

中文翻译：

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机械活化的纳米晶Fe-Cr合金热处理后的固相反应

摘要

X射线衍射和Mössbauer光谱用于研究在热处理过程中Fe-Cr纳米晶合金中发生的固相反应。在对机械合金化的Fe-Cr粉末进行等时退火后，直到700°C的温度，所有样品的纳米结构状态都得以保留。Fe（80）Cr（20）合金倾向于在整个退火温度范围内分离。在400–500°C的温度范围内对所有样品进行退火可将其分为富铁和富铬区域。在高于500°C的退火温度下，在Fe（70）Cr（30）和Fe（60）Cr（40）的样品中观察到了短程有序趋势的变化。Fe（52）Cr（48）在高于600°C的温度下退火样品会导致σ相的形成。