采用等离子喷涂技术在TC4钛合金表面制备了常规Metco130陶瓷涂层及纳米结构Al2O3-13wt%TiO2涂层,并利用CO2激光器对涂层进行了激光重熔,采用X射线衍射分析(XRD)、扫描电镜分析(SEM)、微区成分分析(EDAX)及维氏硬度试验研究了激光重熔前后涂层的组织性能变化.结果表明,等离子喷涂涂层与基体形成了较好的机械结合,但涂层中存在孔隙,激光重熔后,重熔层与基体形成了良好的冶金结合,其组织结构更为均匀而致密.采用谢乐公式估算了重熔后涂层中各相的平均粒径,结果表明,等离子喷涂纳米结构的涂层在激光重熔后仍然处于纳米结构.另外,选择合理的激光工艺参数,涂层的硬度得到了较大提高.
参考文献
| [1] | 张松,张春华,康煜平,吴维,王茂才,文交/力忠.钛合金表面激光熔覆原位生成TiC增强复合涂层[J].中国有色金属学报,2001(06):1026-1030. |
| [2] | 熊玉明,朱圣龙,王福会.影响Ti合金热稳定性的因素[J].腐蚀科学与防护技术,2001(z1):471-475. |
| [3] | 张晓化,刘道新,唐长斌,高广睿.复合表面改性协同增强Ti合金高温微动疲劳抗力[J].中国有色金属学报,2006(04):599-605. |
| [4] | 张文光,王成焘,刘维民.钛合金表面改性层的摩擦学性能[J].摩擦学学报,2003(02):91-94. |
| [5] | D.K. Das;S.P. Trivedi .Microstructure of diffusion aluminide coatings on Ti-base alloy IMI-834 and their cyclic oxidation behaviour at 650 ℃[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):225-233. |
| [6] | You Wang;Stephen Jiang;Meidong Wang;Shihe Wang;T. Danny Xiao;Peter R. Strutt .Abrasive wear characteristics of plasma sprayed nanostructured alumina/titania coatings[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2000(2):176-185. |
| [7] | 李春福,王斌,张颖,宋开红,罗建民.纳米掺杂Al2O3基等离子喷涂涂层残余应力分析[J].表面技术,2004(01):11-14. |
| [8] | 徐滨士.纳米表面工程[M].北京:化学工业出版社,2003:172-181. |
| [9] | McPherson R .A review of microstructure and properties of plasma.sprayed ceramic coatings[J].Surface and Coatings Techonology,1989,39-40:173-181. |
| [10] | 张建华,田宗军,赵剑峰,黄因慧,余承业,胡育文,张永康.Al2O3纳米复合陶瓷涂层激光熔覆试验研究[J].激光杂志,2004(03):67-69. |
| [11] | J. A. Picas;A. Forn;G. Matthaus .HVOF coatings as an alternative to hard chrome for pistons and valves[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2006(5/6):477-484. |
| [12] | Yao JH;Ma CN;Gao MX;Kong FZ;Zhang QL .Microstructure and hardness analysis of carbon nanotube cladding layers treated by laser beam[J].Surface & Coatings Technology,2006(6):2854-2858. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%