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Ｔ Ｅ Ｍ 研究表明，低碳（００１～００３ｗ ｔ．％ Ｃ） Ｆｅ（１５，２５） Ｃｒ（４，５） Ａｌ合金经 １２００℃固溶处理后再于 ４７５～５４０℃时效时，碳化物迅速在晶界、位错等晶体缺陷处析出。晶界碳化物近于连续，晶界两侧形成析出带。析出相的衍射谱与 Ｃｒ２３ Ｃ６ 和 Ｃｒ７ Ｃ３ 基本吻合。在含０４ｗ ｔ．％ Ｙ 的 Ｆｅ Ｃｒ Ａｌ合金中，含钇相的衍射谱与六方α Ｆｅ１７ Ｙ２ 相的谱吻合，该相俘获碳原子的作用使合金在时效时不发生可察觉的碳化物析出。
T E M studies have shown that the low-carbon (001 ~ 030w t.% C) Fe (15,25) Cr (4,5) Al alloys after solution treatment at 1200 ℃ and then at 475 ~ 540 ℃ Aging, carbide rapidly in grain boundaries, dislocations and other crystal defects at the precipitation. Grain boundary carbides are nearly continuous, forming precipitation on both sides of the grain boundary. The diffraction spectrum of precipitated phase is basically consistent with that of Cr23 C6 and Cr7 C3. Containing 0 4w t. % Y Fe Cr Al alloy, the diffraction spectrum of the yttrium-containing phase is in agreement with the spectrum of the hexagonal α-Fe17 Y2 phase, and the effect of capturing carbon atoms in the phase does not cause any detectable carbide precipitation during aging.