摘要
应用电沉积－反应烧结方法在Ｆｅ＿３Ａｌ表面制得Ｃｒ＿２Ｏ＿３和Ｙ＿２Ｏ＿３薄膜。在９００℃空气中氧化结果表明，表面沉积Ｃｒ＿２Ｏ＿３薄膜可以明显提高Ｆｅ＿３Ａｌ的抗氧化能力和氧化层的粘附性；表面沉积Ｙ＿２Ｏ＿３薄膜可以改变氧化层的形貌，抑制氧化层的剥落。ＸＲＤ，ＳＥＭ及ＥＤＸ分析表明，表面施加氧化物薄膜后，氧化产物层晶粒细小，从而减小了生长应力，减轻了开裂和剥落。表面沉积Ｃｒ＿２Ｏ＿３薄膜，可以有效地降低Ｆｅ＿３Ａｌ表面的氧分压，促进合金中铝选择氧化。
A uniform,dense and defect-free oxide thin film is applied on the surface of intermetallic Pe_3Al by electrode position-reaction sintering,and the effects of the film on the oxldation of Fe_3Al at 900℃in air are studied,It is proved that, by surface-applied cr_2O_3 thin film, the oxidation resistance and the adhesion of oxide scale are improved,The scale spallation resistance of alumina is greatly itnproved by surface-applied Y_2O_3 thin film. The oxide scale is studied by XRD, SEM and E DX. it is found that the oxide scale consists of Al_2O_3 and the oxide grains are very fine.The stresses arising from the oxide grow,hprocess itself can be relaxed by these fine gra-Ins. It is suggested that the selective exidation of aluminium in Fe_3Al is pre-moted when the partial pressure of oxygen at the surface of alloy is greatly decreased.
出处
《兵器材料科学与工程》
CSCD
北大核心
1995年第6期15-18,共4页
Ordnance Material Science and Engineering
基金
国家自然科学基金
北京中关村联合分析测试中心资助
