TC4表面掺La微弧氧化涂层的显微结构与耐磨性的研究  

Investigation on microstructure and wear resistance of La-doped micro-arc oxidation coating on TC4 alloy surface

作　　者：张云龙[1] 董鑫焱 李国晶[1] 杨涵崧[1] 周洋 李成海[1] 王俊青 牛楚涵 Zhang Yunlong;Dong Xinyan;Li Guojing;Yang Hansong;Zhou Yang;Li Chenghai;Wang Junqing;Niu Chuhan(Collage of Materials Science and Engineering,Jiamusi University,Jiamusi 154000,China;Collage of Basic Medicine,Jiamusi University,Jiamusi 154000,China;Department of Stomatology,Hongqi Hospital Affiliated to Mudanjiang Medical College,Mudanjiang 157000,China)

机构地区：[1]佳木斯大学,材料科学与工程学院,黑龙江佳木斯154000 [2]佳木斯大学基础医学院,黑龙江佳木斯154000 [3]牡丹江医学院附属红旗医院口腔科,黑龙江牡丹江157000

出　　处：《轻金属》2024年第2期42-48,共7页Light Metals

基　　金：黑龙江省教育厅基础科研业务费项目(No.2018-KYYWF-0919)。

摘　　要：针对TC4钛合金在服役期间耐磨性较差等问题,本文在乙酸钙-六偏磷酸钠电解液体系下运用微弧氧化工艺在TC4钛合金表面制备出掺La陶瓷涂层。重点研究了电解液中掺杂La(NO_(3))_(3)对TC4钛合金微弧氧化涂层(MAO)耐磨性的影响。利用XRD、SEM、显微硬度计、摩擦磨损试验机、涂层附着力划痕仪等仪器对不同La(NO_(3))_(3)掺杂量下的微弧氧化涂层的物相组成、微观形貌、厚度、显微硬度、摩擦因数、结合力等指标进行表征。结果表明:随着La(NO_(3))_(3)掺杂量增加,MAO涂层由HAp、A-TiO_(2)、R-TiO_(2)、La_(2)O_(3)相组成。掺La陶瓷涂层厚度虽略有减小,但致密性有所提高。涂层的显微硬度先增大后减小、摩擦因数先减小后增大。当La(NO_(3))_(3)掺杂量为6 g/L时,涂层显微硬度提高31.18%,涂层与基体结合力提高30.59%,MAO涂层摩擦因数最小,约为0.55。Aiming at the problem of poor wear resistance of TC4 titanium alloy during service,La-doped ceramic coatings were prepared on the surface of TC4 titanium alloy by micro-arc oxidation process in calcium acetate-sodium hexametaphosphate electrolyte system in this paper,the effect of La(NO_(3))_(3)doping in electrolyte on the wear resistance of TC4 titanium alloy micro-arc oxidation coating(MAO)was investigated.The phase composition,microstructure,thickness,microhardness,friction coefficient and adhesion of micro-arc oxidation coatings with different La(NO_(3))_(3)doping amounts were characterized by XRD,SEM,microhardness tester,friction and wear tester,coating adhesion scratch tester and other instruments.The results showed that with the increase of La(NO_(3))_(3)doping amount,the MAO coating was composed of HAp,A-TiO_(2),R-TiO_(2)and La_(2)O_(3) phases.Although the La-doped coating thickness was slightly reduced,the compactness was improved.The microhardness of the coating increased first and then decreased,at the same time,the friction coefficient decreased first and then increased.When the doping amount of La(NO_(3))_(3)was 6 g/L,the microhardness of the coating increased by 31.18%,the adhesion between the coating and the substrate increased by 30.59%.The friction coefficient of the MAO coating was the smallest,which was about 0.55.

关 键 词：TC4钛合金 微弧氧化 稀土掺杂 耐磨性 

分 类 号：TG178[金属学及工艺—金属表面处理]