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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Carbon diffusion behavior in molybdenum at relatively low temperatures
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Carbon diffusion behavior in molybdenum at relatively low temperatures

机译：较低温度下钼中的碳扩散行为

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摘要

Purpose of this study is to investigate the carbon diffusion behavior in pure molybdenum at relatively low temperatures by means of fracture surface observation. Carbon addition was performed at a temperature of 1273-1373 K with the heating time being changed. Fracture surface of the specimen after carbon addition was examined using SEM and the carbon diffusion distance was estimated from the change of fracture mode as a function of the distance from the surface. Results are summarized as follows. First, the carbon diffusion distance increased approximately linearly with the increase of heating time from 1.2 to 10.8 ks. This relationship does not agree with that obtained at much higher temperatures. From Arrhenius plots of the slope of the straight line and the temperature, activation energy was calculated (155 kJ/mol). Secondly, the carbon diffusion distance estimated in this study was generally larger than that simulated using the data of Rudman, particularly at a longer heating time.
机译：本研究的目的是通过观察断口来研究相对较低温度下纯钼中的碳扩散行为。碳的添加在改变加热时间的情况下在1273-1373 K的温度下进行。使用SEM检查碳添加后的样品的断裂表面，并根据断裂模式的变化来估计碳的扩散距离，该变化是距表面的距离的函数。结果总结如下。首先，碳的扩散距离随着加热时间从1.2 ks增加到10.8 ks而线性增加。这种关系与在更高温度下获得的关系不一致。根据直线的斜率和温度的阿伦尼乌斯曲线，计算出活化能（155 kJ / mol）。其次，在这项研究中估计的碳扩散距离通常大于使用Rudman数据模拟的碳扩散距离，尤其是在更长的加热时间下。

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