【摘要】 本工作用液态急冷法在Fe-C,Fe-C-Sb系合金中获得h.c.p.结构的介稳相8.8相是一个固溶体,其晶格常数随着含碳量和含锑量的增加而增大,但c/α值则近于恒量。Fe-C-Sb合金中的8相具有一定的热稳定性,差热分析指出,它在125℃以下不分解,而且Si和Sb的加入提高了8相的稳定性。8相的晶粒细小,为10^-1微米级,晶界粗宽。本工作对Ruhl和Cohen等由Fe-C-Si系合金获得8相的工作进行了验证。用扫描电子显微镜及透射电子显微镜对8相的形貌进行了观察。更多还原

【Abstract】 An ε metastable phase of h.c.p. structure has been obtained in the alloy systems Pe-C, Pe-C-Sb by means of splat quenching. The ?phase is a solid solution the lattices constant of which increases with increase of Sb and C, but the value c/a is approximately constant. The ε phase of the Pe-C-Sb alloy is fairly stable thermally. DTA shows that the ε phase is non-dissociative below 125℃ and the addition of Si and Sb increases the stability. The grain size of the e phase is of the order of 10-1 micron. Our work verifies that of R.C. Ruhl and M. Cohen et al. concerning the e phase of the Fe-C-Si alloy. The topography of this ε phase has been studied by means of scanning and transmission electron microscopy.更多还原