为了改善钛合金的高温耐磨性能,采用锆-氮离子共渗与异步渗(渗锆后再氮化处理)两种工艺技术分别在Ti6A14V钛合金表面制备致密的锆-氮合金化改性层,对比研究了合金化层的组织结构特征和高温摩擦磨损性能.结果表明,两种工艺制各的Zr-N合金层表面均由ZrN相组成,异步渗改性层的内层则包含较厚的Zr-Ti固溶体,两种等离子表面合金化层均使钛合金表面硬度显著提高.同样温度和处理时间条件下,异步渗合金化层的厚度约为锆-氮共渗合金化层厚度的6倍,且氮化物层也较厚,原因归于前者处理过程中Zr与Ti之间良好固溶特性的充分发挥及ZrN相的扩散障作用的有效抑制.300℃高温下球盘摩擦磨损试验结果表明,由于锆-氮共渗合金化层深度较小,因而改善钛合金基材耐磨性能的效果相对较低.锆-氮异步渗处理则使Ti6A14V钛合金耐磨性能显著提高,摩擦因数降低50%以上,比磨损率降低2个数量级,原因归于该类合金化层高的表面硬度、大的层深、良好的高温抗氧化性能及优异表面承载能力的有机匹配.
参考文献
[1] | Wilson S;Alpas A T .[J].Wear,2000,245(01):223. |
[2] | Tang Bin,Zhu Xiaodong,He Jianwen.Hardness, toughness and electrochemical properties of Cr-N coating by ion beam enhanced deposition[J].中国有色金属学会会刊(英文版),1999(04):753-756. |
[3] | 秦林,唐宾,刘道新,徐重.钛合金Ti6Al4V表面Mo-N改性层的摩擦性能研究[J].稀有金属材料与工程,2005(09):1465-1468. |
[4] | 张晓化,刘道新,王小锋,唐宾.TiN/Ti复合膜与多层膜对Ti811合金高温摩擦性能及微动疲劳抗力的影响[J].摩擦学学报,2009(04):311-318. |
[5] | Lopez G Staia M H .[J].Surface and Coatings Technology,2005,200:2092. |
[6] | Kircher T A;Courtright E L .[J].Materials Science and Engineering,1992,A155:67. |
[7] | Krusin-Elbaum L;Wittmer M .[J].Thin Solid Films,1983,107:111. |
[8] | 奚运涛,刘道新,韩栋.成分梯度ZrN膜层的制备及摩擦学行为[J].中国表面工程,2009(03):21-25. |
[9] | Zhong Xu .[P].USPatent.4520268,1985. |
[10] | Yildiz F;Yetim AF;Alsaran A;Celik A .Plasma nitriding behavior of Ti6Al4V orthopedic alloy[J].Surface & Coatings Technology,2008(11):2471-2476. |
[11] | Sato M;Takeyama MB;Aoyagi E;Noya A .Application of extremely thin ZrN film as diffusion barrier between Cu and SiOC[J].Japanese journal of applied physics,2008(1 Pt.2):620-624. |
[12] | Takeyama M B;Noya A;Sakanishi K .[J].Journal of Vacuum Science and Technology,2000,18(03):1333. |
[13] | Bin Zhao;Kefei Sun;Zhenlun Song et al.[J].Applied Surface Science,2010,256:6003. |
[14] | Mayumi B Takeyama;Takaomi Itoi;Eiji Aoyagi et al.[J].Applied Surface Science,2002,190:450. |
[15] | 温诗铸;黄平.摩擦学原理[M].北京:清华大学出版社,2002:44. |
[16] | Curtis Lee;Anthony Sanders;Nishant Tikekar;K. S. Ravi Chandran .Tribology of titanium boride-coated titanium balls against alumina ceramic: Wear, friction, and micromechanisms[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2008(3/4):375-386. |
[17] | Reddy G L N;Ramana J V;Sanjiv Kuma et al.[J].Applied Surface Science,2007,253(17):723. |
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