许金沙,陈晓卿,张显程,轩福贞

• 1:华东理工大学承压系统与安全教育部重点实验室

摘要(Abstract)：

采用等离子喷涂与激光渗氮技术相结合的工艺方法,在Ti6Al4V合金表面实现了TiN/Ti3Al金属间化合物复合涂层的快速制备。首先在Ti6Al4V基体表面利用等离子喷涂的方法预置一层纯铝涂层;然后在纯氮环境下,利用激光渗氮化技术对试样表面进行合金化处理。采用扫描电镜(SEM)、X射线衍射(XRD)等试验手段,研究了氮气流量以及激光扫描速度两个激光渗氮工艺参数对TiN/Ti3Al金属间化合物复合涂层的微观组织的影响。结果表明,复合涂层中TiN相的含量随着氮气流量的增加与激光扫描速度的减小而增加。工艺参数对涂层中TiN增强相的形貌有着重要影响。在高氮气流量、低激光扫描速度条件下制备出的涂层中,TiN相呈颗粒状。对于低氮气流量、高激光扫描速度条件下,TiN增强相呈树枝状。

关键词(KeyWords)： 钛合金;复合涂层;微观组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(10972078,51175177)

作者(Author): 许金沙,陈晓卿,张显程,轩福贞

DOI: 10.13289/j.issn.1009-6264.2012.s2.025

参考文献(References)：

• [1]Boyer R R.An overview on the use of titanium in the aerospace industry[J].Material Science and Engineering A,1996,213(1-2):103-104.
• [2]Wang K.The use of titanium for medical applications in the USA[J].Material Science and Engineering A,1996,213(1-2):134-137.
• [3]Feofilov R N,Chirkov V K,Levin M V.Application of titanium alloys in medical instruments[J].Biomedical Engineering,1977,11(1):44-47.
• [4]Li Z W,Gao W,Ying D Y,et al.Improved oxidation resistance of Ti with a thermal sprayed Ti3 Al(O)-Al2 O3 composite coating[J].ScriptaMaterialia,2003,48(12):1649-1653.
• [5]Guo B G,Zhou J S,Zhang S T,et al.Tribological properties of titanium aluminides coatings produced on pure Ti by laser surface alloying[J].Surfaceand Coatings Technology,2008,202(17):4121-4129.
• [6]Zhang D L,Liang J,Wu J.Processing Ti3Al-SiC nanocomposites using high energy mechanical milling[J].Material Science and Engineering A,2004,375-377:911-916.
• [7]Raveh A,Hansen P L,Avni R,et al.Microstructure and composition of plasma-nitrided Ti-6Al-4V layers[J].Surface and Coatings Technology,1989,38(3):339-351.
• [8]Cheng D J,Sun W P,Hon M H.The morphology and structure of chemically vapour-deposited Ti(C,N)coatings[J].Thin Solid Films,1987,146(1):45-53.
• [9]Barry J E,Tobin E J,Sioshansi P.Ion implantation of titanium alloys for improved fretting resistance[J].Surface and Coating Technology,1992,51(1-3):176-179.
• [10]Schasf P.Laser nitriding of metals[J].Progress Materials Science,2002,47(1):1-161.
• [11]Yu H J,Sun F J,Zhang J.Laser and plasma nitriding of titanium using CW-CO2 laser in the atmosphere[J].Current Applied Physics,2009,9(1):227-233.

文章评论(Comment)：