大气等离子喷涂制备Ni基TiB_2复合涂层的研究  

Study on Titanium Diboride-Nickel Composite Coating by Atmospheric Plasma Spraying

作　　者：刘梦茹[1] 程汉池[1] 

机构地区：[1]佳木斯大学材料学院,黑龙江佳木斯154007

出　　处：《热加工工艺》2014年第6期133-136,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51141009);黑龙江省自然科学基金资助项目(E201011);佳木斯大学校级重点资助项目(Lz2010-008)

摘　　要：采用化学镀Ni-B合金包覆TiB2粉,Metco-7M等离子喷涂制备TiB2/Ni-5%Al金属陶瓷涂层,研究TiB2含量对涂层的微观组织、结合强度、显微硬度的影响。用X射线衍射、SEM扫描电镜分析涂层物相组成和形貌;用线扫描能谱分析涂层与基体的界面元素分布;采用对偶件拉伸法测试涂层结合强度,用显微硬度仪测试涂层硬度。结果显示,TiB2以原始颗粒形态存在于涂层中,无TiB2的氧化产物TiO2,其他氧化产物Al2O3、NiO含量较低;涂层与低碳钢基体存在微观冶金结合;结合强度高达40 MPa,随TiB2含量增加,涂层显微硬度增大,结合强度变化不大。Atmospheric plasma spraying （APS） techniques were utilized to prepare TiB2/Ni-5A1 composite coating on mild steel substrates. The effects of TiB2 contents on microstructure, bond strength and microhardness were researched. The microstructure of the coating was studied by SEM and XRD. Also bond strength and microhardness were measured. The results show that in composite coatings TiB2 particles remains primal shape without being oxidized, Al2O3 and NiO contents are few; Micro-metallurgical bonding has formed between the coating and substrate; Microhardness increases but bond strength has a little change with TiB2 contents increasing.

关 键 词：Ni基TiB2复合涂层 等离子喷涂 微观组织 显微硬度 结合强度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]