低压冷喷涂Cu-Ni-Al_(2)O_(3)复合涂层的制备及其力学性能研究  

Preparation and mechanical properties study of low-pressure cold-sprayed Cu-Ni-Al_(2)O_(3)composite coatings

作　　者：朱怀清 刘洪金 丁明惠 张晨 刘欣雨 明丽君 Zhu Huaiqing;Liu Hongjin;Ding Minghui;Zhang Chen;Liu Xinyu;Ming Lijun(College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001)

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

出　　处：《化工新型材料》2024年第10期187-191,206,共6页New Chemical Materials

基　　金：黑龙江省自然科学基金(LH2021E029)。

摘　　要：采用低压冷喷涂技术在AZ91D镁合金基体上制备了Ni含量不同的Cu-Ni-Al_(2)O_(3)复合涂层。采用扫描电子显微镜和X射线衍射仪分析了复合涂层的微观形貌和结构;通过显微硬度、结合强度和摩擦磨损试验研究了复合涂层的力学性能。结果表明:Cu-Ni-Al_(2)O_(3)复合涂层结构致密,涂层未发生氧化和相变。控制合适的Ni含量可降低涂层的孔隙率,提高涂层的沉积效率、结合强度和耐磨性。当Ni含量为21%(质量分数)时,Cu-Ni-Al_(2)O_(3)复合涂层的孔隙率为0.94%,沉积效率为36.32%,结合强度为26.31MPa,体积磨损率为1.10×10^(-11) m ^(3)/m。Cu-Ni-Al_(2)O_(3)composite coatings with different Ni contents were prepared on AZ91D magnesium alloy substrates using low-pressure cold spraying technology.The micro-morphology and the structure of the coatings were analyzed by SEM and XRD.The mechanical properties of the coatings were studied through microhardness,bond strength,and friction-wear tests.The results showed that the Cu-Ni-Al_(2)O_(3)composite coatings exhibited a dense structure without oxidation or phase transformation.The porosity of the coatings could be reduced and their deposition efficiency,bond strength,and wear resistance could be improved by controlling the amount of Ni.When the Ni content was 21%(mass fraction),the Cu-Ni-Al_(2)O_(3)composite coating exhibited a porosity of 0.94%,a deposition efficiency of 36.32%,a bond strength of 26.31MPa,and a volume wear rate of 1.10×10^(-11) m ^(3)/m.

关 键 词：低压冷喷涂 AZ91D镁合金 复合涂层 微观形貌 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]