摘要
对经过４７５～５４０℃时效的Ｆｅ－（１５～２５）Ｃｒ－（４～５）Ａｌ合金进行了ＴＥＭ研究，观察到球形富Ｃｒ－α′相粒子从α相基体均匀析出。在４７５℃时效１０００ｈ后粒子的平均直径约８ｎｍ，间距约１４ｎｍ。电子衍射斑点沿圆弧分裂和拉长，这表明α′相开始脱离与α相的共格关系，但在长时间内两相仍有〈００１〉、〈１１１〉或〈０１１〉等晶向大体平行的取向关系。
In TEM studies on Fe (15～25)Cr (4～5)Al alloys aged at 475～540℃, the dispersed spheroidal particles of Cr rich α′ phase precipitated from α phase matrix were observed. After aging at 475℃ for 1000h, average diameter and space of the particles were about 8 and 14 nm. It was indicated that, according to splitting and elongating of electron diffraction spots of α phase along circle arcs weakening of the coherency between α′ phase and α phase occured during the aging, but the orientations of 〈001〉,〈111〉 or 〈011〉 of α′ phase remained to be roughly parallel to the same directions of α phase for a long time.
出处
《电子显微学报》
CAS
CSCD
1999年第2期200-206,共7页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金
