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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >High temperature environmental interactions in carbon-alloyed iron aluminide of low Al content
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High temperature environmental interactions in carbon-alloyed iron aluminide of low Al content

机译：低铝含量的碳合金铝化铁中的高温环境相互作用

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摘要

High temperature material-environmental interactions (oxidation and decarburization) have been studied in a carbon-alloyed iron aluminide of composition Fe-8.5 percent Al-0.42 percent C (wt. percent). Bulky Fe_3AlC_x carbides were uniformly distributed in a matrix of Fe_3Al. Samples were exposed at 923, 973, 1023, and 1073 K in laboratory air for different lengths of time and their surface scales were characterized. The oxidation rate decreased beyond 973 K which has been explained by a change in the nature of the surface scale Analysis of the decarburized microstructures revealed that the carbides decomposed into finer carbides, dissolved in the matrix and carbon diffused out to the surface. The mechanism of decarburization appears to be similar to that in steels.
机译：在成分为Fe-8.5％Al-0.42％C（wt。％）的碳合金化铝化铁中，已经研究了高温材料与环境的相互作用（氧化和脱碳）。大块的Fe_3AlC_x碳化物均匀分布在Fe_3Al的基体中。将样品暴露在923、973、1023和1073 K的实验室空气中不同的时间长度，并表征其表面水垢。氧化速率降低到973 K以上，这可以通过表面垢性质的变化来解释。对脱碳的微观结构的分析表明，碳化物分解为更细的碳化物，溶解在基体中，并且碳扩散到表面。脱碳机理似乎与钢相似。

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