作　　者： ; ; ; ; ;

机构地区： 清华大学材料科学与工程系

出　　处： 《金属热处理》 2012年第10期25-28,共4页

摘　　要： 研究了水蒸气对Fe-13%Cr-5%Ni合金在800℃下的氧化膜形貌的影响。用光学显微镜、扫描电子显微镜观察了氧化膜的截面及表面形貌,用XRD分析了氧化膜的物相组成。结果表明,干燥气氛下形成的氧化膜表面呈鳞片状,截面为单层结构,其物相组成为Fe2O3和Cr2O3;富含水蒸气的气氛下形成的氧化膜表面则有大量粗糙的凸起,截面为复合层结构,外层有大量孔洞,其物相组成为Fe2O3,内层较为致密,其物相组成为FeCr2O4。 Effect of water vapor on the morphology of oxide scales of Fe-13% Cr-5% Ni alloy at 800 ℃ was studied. Optical microscopy and scanning electron microscopy methods were employed to observe the cross section morphologies and the surface morphologies of the oxide scales. XRD method was employed to analyze the phase composition of the oxide scales. The results show that the scales formed in dry atmospheres exhibits scaly surface morphology, and the cross section morphologies suggest that the scales formed in dry atmospheres are single layers, which are consisted of Fe2O3 and Cr2O3. The scales formed in humid atmospheres exhibits coarse surface morphologies, consisted of Fe2O3 outer layer and FeCr204 inner layer. Large amount of voids existe in the outer scales whereas fewer voids in the inner scales.

关 键 词： 合金 高温氧化 表面形貌 水蒸气

领　　域： [金属学及工艺] [金属学及工艺]