AlSi涂层的制备及其在空气中800℃下氧化行为的研究  

Study of preparation of AlSi coating and its oxidation behavior in air at 800℃

作　　者：张轲 周岩 司瑞雪 鲁捷 辛士刚 张洪波 曹中秋 ZHANG Ke;ZHOU Yan;SI Ruixue;LU Jie;XIN Shigang;ZHANG Hongbo;CAO Zhongqiu(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China;Center of Experiment,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]沈阳师范大学化学化工学院,沈阳110034 [2]沈阳师范大学实验教学中心,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2018年第4期289-294,共6页Journal of Shenyang Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50771068);辽宁省自然科学基金指导计划(201602679)

摘　　要：采用先电弧离子镀再真空热处理的方法在耐热钢T91合金表面形成了2种AlSi扩散涂层。T91和2种AlSi扩散涂层在800℃空气中的等温氧化结果显示T91的氧化动力学近似服从直线规律而2种AlSi涂层均近似服从抛物线规律;T91在800℃空气中等温氧化时其表面生成了一层很厚且具有尖晶石结构不具有保护性的FeCr混合氧化物层;然而T91表面施加2种AlSi涂层后能显著降低其氧化增重,原因是高温氧化后在2种涂层表面均生成了一层连续、致密、与涂层结合良好且具有高温防护性的Al_2O_3氧化膜,因而对基体合金起到了良好的防护作用。Two kinds of AlSi diffusion coatings were formed on the surface of heat resistant steel T91 alloy by arc ion plating then vacuum heat treatment.The results of T91 of isothermal oxidation in the air at 800 ℃ shows that its oxidation kinetics is approximate to linear rule,however,oxidation kinetics of two kinds of AlSi diffusion coating are approximate to obey parabolic law.After 200 hoxidation,the surface of T91 is generated a very thick FeCr mixed oxides with composed of spinel structure that is not protective.Nevertheless,after applying two kinds of AlSi diffusion coating on T91 surface,it can significantly reduce the oxidation weight increase,because a layer of continuous,dense,and with high temperature protective Al2O3 oxide film are formed on the surface of two kinds of AlSi diffusion coatings in the processes of oxidations,therefore,the two kinds of AlSi diffusion coatings played a good protection to matrix alloy.

关 键 词：耐热钢T91 电弧离子镀 AlSi扩散涂层 高温氧化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]