SiO2薄膜涂覆层数对304不锈钢抗高温氧化性能的影响  

Effect of SiO2 film layers on the high temperature oxidation resistance of 304 stainless steel

作　　者：马静[1,2] 王瑞阳 温宁 MA Jing;WANG Ruiyang;WEN Ning(School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Key Laboratory of Material Near-Net Forming Technology,Shijiazhuang,Hebei 050018,China;Hebei Innovation Center for Superalloy Investment Casting Technology,Huanghua,Hebei 061100,China;Steel Ball Technology Innovation Center of Hebei Province,Handan,Hebei 056000,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018 [2]河北省材料近净成形技术重点实验室,河北石家庄050018 [3]河北省高温合金熔模铸造技术创新中心,河北黄骅061100 [4]河北省球磨钢球工程技术研究中心,河北邯郸056000

出　　处：《河北科技大学学报》2021年第1期75-81,共7页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(51761030)。

摘　　要：为提高304不锈钢的抗高温氧化性能,以正硅酸乙酯(TEOS)为原料,采用溶胶-凝胶法,在不锈钢表面制备了SiO2薄膜,通过氧化动力学,XRD,SEM和EDS分析,研究了涂覆层数对不锈钢900℃抗高温氧化性能的影响。结果表明,SiO2薄膜与不锈钢基体的附着性良好,促进了不锈钢表面发生选择性氧化,生成保护作用的Cr2O3和NiCr2O4氧化层,不锈钢的抗高温氧化性能显著提高,其中涂覆3层SiO2薄膜试样的抗高温氧化性能最佳,经900℃循环氧化100 h后氧化增重与氧化剥落仅为未涂覆试样的58.1%和41.4%。SiO2薄膜涂覆有效提高了不锈钢的抗高温氧化性能,是表面处理方法应用于高温环境的又一尝试,为溶胶-凝胶法制备其他薄膜提供了借鉴和参考。In order to improve the oxidation resistance of 304 stainless steel,SiO2 thin film was prepared on the surface of stainless steel by sol-gel method with tetraethyl orthosilicate(TEOS)as raw material.The effect of film layers on the high temperature oxidation resistance of stainless steel at 900℃was studied by means of oxidation kinetics,XRD,SEM and EDS.The results show that the adhesion of SiO2 film to stainless steel matrix is good,which promotes the selective oxidation on the stainless steel surface and the formation of protective Cr2O3 and NiCr2O4 oxide layers.The high temperature oxidation resistance of stainless steel is improved remarkably.The oxidation resistance of the sample coated with three layers of SiO2 film proforms the best,and the oxidation weight gain and oxidation spalling of the sample are only 58.1%and 41.4%of the uncoated sample after 100 hours of cyclic oxidation at 900℃.The high temperature oxidation resistance of stainless steel is effectively improved through SiO2 film coating,which is another attempt of surface treatment method applied to high temperature environment,and provides reference for other thin films prepared by sol-gel method.

关 键 词：材料失效与保护 溶胶-凝胶法 SIO2薄膜 涂覆层数 高温氧化 选择氧化 

分 类 号：TG174.32[金属学及工艺—金属表面处理]