YSZ纤维增强等离子喷涂Al_2O_3/8YSZ涂层耐磨性能研究  

Wear Resistance of YSZ Fibers Reinforced Al_2O_3/8YSZ Coatings Prepared by Atmosphere Plasma Spraying

作　　者：汪倡 庞学佳[2] 高宗鸿 刘金娜 房永超 崔秀芳[1] 刘二宝 金国[1] WANG Chang;PANG Xuejia;GAO Zonghong;LIU Jinna;FANG Yongchao;CUI Xiufang;LIU Erbao;JIN Guo(College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001;The 703 Research Institute of CSIC,Harbin 150078)

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001 [2]中国船舶重工集团公司第七○三研究所,哈尔滨150078

出　　处：《材料导报》2018年第4期563-568,共6页Materials Reports

基　　金：国家自然科学基金(51375106)

摘　　要：将纤维增韧理念应用在等离子喷涂涂层设计中,可提升陶瓷涂层的断裂韧性,解决等离子喷涂陶瓷涂层韧性不足的问题。采用大气等离子喷涂技术制备了添加4%和8%(质量分数)氧化钇稳定氧化锆(YSZ)的YSZ纤维增强Al_2O_3/8YSZ涂层,对纤维增强涂层的断裂韧性及耐磨性能进行了研究。结果表明:等离子喷涂YSZ纤维增强Al_2O_3/8YSZ陶瓷涂层由α-Al_2O_3、γ-Al_2O_3和t′相组成;添加YSZ纤维后,涂层的断裂韧性明显改善,添加8%YSZ纤维复合涂层的KIC达2.924 MPa·m^(1/2),涂层的显微硬度变化较小;在相同磨损工况下,相比于未添加纤维的涂层,YSZ纤维增强涂层的耐磨性显著提高,其中,添加8%YSZ纤维后复合涂层的耐磨性是未添加涂层的2.5倍。The purpose of this work is to apply fiber toughening concept in the design of plasma spraying coatings to improve the fracture toughness,so as to solve the problem of the poor toughness of plasma spraying ceramic coatings.4wt%and 8wt%yttria stabilized zirconia(YSZ)fibers reinforced Al 2O 3/8YSZ coatings were prepared by atmosphere plasma spraying method.The effect of fiber reinforced coatings on fracture toughness and wear resistance was studied.The results indicated that the phases of coatings wereα-Al 2O 3,γ-Al 2O 3 and t′.Fracture toughness of Al 2O 3/8YSZ coatings added with YSZ fibers were significantly improved,and the K IC of coatings added with 8wt%YSZ fibers was 2.924 MPa·m 1/2.The addition of YSZ fibers has little influence on the micro-hardness of coatings.In the same wear condition,the wear loss of coatings added with YSZ fibers was greatly reduced,compared with the coatings without fibers.The wear resistance of coatings added with 8wt%YSZ fibers was 2.5 times of the coatings without fibers.

关 键 词：大气等离子喷涂 Al2O3/8YSZ涂层 纤维 断裂韧性 耐磨性 

分 类 号：TG174.453[金属学及工艺—金属表面处理]