超音速等离子喷涂Al_(2)O_(3)与Al_(2)O_(3)-13%TiO_(2)涂层热震性能  

Thermal shock resistance of Al_(2)O_(3)and Al_(2)O_(3)-13%TiO_(2)coatings deposited by supersonic atmospheric plasma spraying

作　　者：付倩倩 通雁鹏 FU Qianqian;TONG Yanpeng(College of Mechanical&Electrical Engineering,Shanxi Datong University,Datong 037000,China)

机构地区：[1]山西大同大学机电工程学院,大同037000

出　　处：《粉末冶金技术》2023年第4期378-384,共7页Powder Metallurgy Technology

摘　　要：采用超音速等离子喷涂工艺在不锈钢基体上制备了FeAl/Al_(2)O_(3)、FeCrAl/Al_(2)O_(3)、FeAl/Al_(2)O_(3)-13%TiO_(2)、FeCrAl/Al_(2)O_(3)-13%TiO_(2)四种涂层,通过扫描电镜表征微观结构,图像分析技术测量孔隙率,多峰法计算α-Al_(2)O_(3)质量分数,并测试了涂层的抗热震性能和结合强度。结果表明:超音速等离子喷涂制备的Al_(2)O_(3)涂层中α-Al_(2)O_(3)的质量分数约为40.3%~42.5%,涂层孔隙率约为3.47%~3.52%,制备的Al_(2)O_(3)-13%TiO_(2)涂层中α-Al_(2)O_(3)的质量分数约为24.0%~29.7%,涂层孔隙率约为3.12%~3.31%。水淬热震实验(800℃/保温30 min)表明,FeCrAl/Al_(2)O_(3)涂层的抗热震性能最优,FeCrAl/Al_(2)O_(3)-13%TiO_(2)涂层抗热震性能次之,FeAl/Al_(2)O_(3)涂层与FeAl/Al_(2)O_(3)-13%TiO_(2)涂层抗热震性能最差。The thermal shock resistance of FeAl/Al_(2)O_(3),FeCrAl/Al_(2)O_(3),FeAl/Al_(2)O_(3)-13%TiO_(2),and FeCrAl/Al_(2)O_(3)-13%TiO_(2)coatings deposited by supersonic atmospheric plasma spraying(SAPS)on the stainless steel matrix was investigated in this paper.The microstructure of the coatings was characterized by scanning electron microscope,the porosity was measured by image analysis,the mass fraction ofα-Al_(2)O_(3)was calculated by multi peak method,and the bonding strength was tested.The results show that,the mass fraction ofα-Al_(2)O_(3)in Al_(2)O_(3)coating is 40.3%~42.5%,the porosity is 3.47%~3.52%;the mass fraction ofα-Al_(2)O_(3)in Al_(2)O_(3)-13%TiO_(2)coating is about 24.0%~29.7%,the porosity is 3.12%~3.31%.The results of water-quenching tests at 800℃for 30 min show that,the FeCrAl/Al_(2)O_(3)coating presents the highest thermal shock resistance,and the FeCrAl/Al_(2)O_(3)-13%TiO_(2)coating takes the second place.The FeAl/Al_(2)O_(3)and FeAl/Al_(2)O_(3)-13%TiO_(2)coatings exhibite the same thermal shock resistance,which are the worst in four kinds of coatings.

关 键 词：超音速等离子喷涂 热震性能 图层 Al_(2)O_(3) FEAL FECRAL 

分 类 号：TG174.4[金属学及工艺—金属表面处理]