采用热蒸镀-原位反应法制备Mo-Si-X-C(X=Al,Ti)碳基陶瓷涂层.利用X射线仪、扫描电子显微镜和纳米压痕测试仪对涂层的微观结构和力学性能进行表征,研究成分及热蒸镀工艺参数对涂层的物相组成、微观结构和力学性能的影响,并揭示涂层的形成机制.结果表明:不同组分蒸镀母料在1550℃、Ar气氛条件下,由于不同蒸气压诱发各异的扩散路径,从而使原位反应生成Mo-Si-X-C(X=Al,Ti)复相陶瓷涂层的形貌、相成分及分布明显不同.添加Ti和Al元素有利于分别生成(Ti0.8Mo0.2) Si2相和Mo(Si,Al)2相,促进热蒸镀过程;随着温度的升高,基体表面Si黏性减弱,同时流动性增强,涂层中钼硅化物消失;1800℃真空环境下涂层中的SiC晶粒异常长大,破坏涂层结构,导致涂层失效.力学性能表明:同时添加Al、Ti元素,形成复杂多相界面结构的23Mo-63Si-7Ti-7Al陶瓷涂层的力学性能最优,其抗压强度达到19.584GPa,显微硬度达到1848HV及弹性模量达到255.124 GPa.
参考文献
| [1] | Sun Wei;Xiong Xiang;Huang Bai-yun.ZrC ablation protective coating for carbon/carbon composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,200914(14):3368-3371. |
| [2] | 苏哲安;杨鑫;黄启忠;黄伯云;李建立;张明瑜;谢志勇.SiC涂层对C/C复合材料高温氧乙炔焰烧蚀性能影响[J].中国有色金属学报,2011(11):2838-2845. |
| [3] | Cascales, Alexis;Tabares, Nicolas;Bartolome, Jose F.;Cerpa, Arisbel;Smirnov, Anton;Moreno, Rodrigo;Isabel Nieto, M..Processing and mechanical properties of mullite and mullite-alumina composites reinforced with carbon nanofibers[J].Journal of the European Ceramic Society,201513(13):3613-3621. |
| [4] | Li HJ;Xue H;Wang YJ;Fu QG;Yao DJ.A MoSi2-SiC-Si oxidation protective coating for carbon/carbon composites[J].Surface & Coatings Technology,200724(24):9444-9447. |
| [5] | Shi-xiang Hou;Zong-de Liu;Dong-yu Liu;Bao-rang Li;Nai-qiang Zhang.Microstructure and oxidation resistance of Mo–Si and Mo–Si–Al alloy coatingsprepared by electro-thermal explosion ultrahigh speed spraying[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20091/2(1/2):108-117. |
| [6] | 邓雄;彭可;周文艳;易茂中;冉丽萍;葛毅成.熔盐法在石墨表面中温制备MoSi2-SiC复合涂层[J].粉末冶金材料科学与工程,2014(1):89-94. |
| [7] | Ting Li;Hejun Li;Xiaohong Shi;Jing Cheng;Lei Liu.Mo-Si-Al-C multiphase oxidation protective coating for carbon/carbon composites[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2013Jul.1(Jul.1):154-158. |
| [8] | 何子博;李贺军;史小红;付前刚;吴恒.化学气相浸渗/反应法制备MoSi2-SiC涂层的合成机理及其氧化性能[J].中国有色金属学报（英文版）,2013(7):2100-2106. |
| [9] | 杨鑫;邹艳红;黄启忠;苏哲安;王秀飞;张明瑜.C/C复合材料MoSi2-Mo5Si3/SiC涂层的制备及组织结构[J].无机材料学报,2008(4):779-783. |
| [10] | 郝振华;孙威;熊翔;但奇善;李江鸿.常压化学气相沉积ZrO 2涂层的显微结构与微观力学性能[J].中国有色金属学报,2013(7):1937-1943. |
| [11] | Yang, J.F.;Prakash, B.;Jiang, Y.;Wang, X.P.;Fang, Q.F..Effect of Si content on the microstructure and mechanical properties of Mo-Al-Si-N coatings[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,201212(12):2010-2013. |
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%