激光熔覆Al2O3-13% TiO2陶瓷层制备及其抗热震性能

利用高频感应辅助激光熔覆技术在镍基高温合金基体上制备了NiCoCrAl-Y2O3黏结层及Al2O3-13% TiO2(质量分数)陶瓷层。通过扫描电镜、能谱仪、X 射线衍射仪分析了涂层的微观结构。实验结果表明，在高频感应辅助激光的作用下，基体与黏结层、黏结层与陶瓷层之间的界面均展现了良好的结合特性，具有明显的界面扩散现象。陶瓷层在激光的作用下形成了三维网状结构，该结构使得陶瓷材料中的TiO2 材料与Al2O3材料均匀分布，减少了因不同材料聚集所产生的内应力。同时对涂层进行了热震实验，结果证明了利用高频感应辅助激光熔覆技术制备的Al2O3-13% TiO2陶瓷层具有良好的抗热震性能，适合工作于高温环境。

Abstract

NiCoCrAl-Y2O3 and Al2O3-13% TiO2 (mass fraction) coatings, formed with means of laser cladding on nickel-based alloy, are heated using high frequency induction sources. The coating and the cross-section are analysed by SEM, XRD, and EDS respectively. The results show that, MCrAlY/Al2O3-13% TiO2 ceramic coating has an excellent chemical combination due to elements obvious diffused in the interface. It is found that Al2O3-rich submicron particles embedded in the TiO2-rich matrix, three-dimensional net structure formed in ceramic coating, which could decrease inner stress between different materials. Meanwhile, thermal shock experiment of samples is tested which shows that Al2O3-13% TiO2 ceramic coating have excellent high temperature property.

参考文献

[1] M. Harju, M. Jrn, P. Dahlsten et al.. Influence of long-term aqueous exposure on surface properties of plasma sprayed oxides Al2O3, TiO2 and their mixture Al2O3-13TiO2［J］. Applied Surface Science, 2008, 254(22): 7272～7279

[2] Yanlu Huang, Yongqiang Yang, Guoqiang Wei et al.. Boundary coupled dual-equation numerical simulation on mass transfer in the process of laser cladding［J］. Chin. Opt. Lett., 2008, 6(5): 356～360

[3] 汪震, 刘其斌, 肖明等. Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层性能的影响［J］. 中国激光, 2011, 38(5): 186～191

Wang Zhen, Liu Qibin, Xiao Ming et al.. Effect of different Nd2O3 contents on performances of rare earth active bioceramic gradient coating produced by wide-band laser cladding［J］. Chinese J. Lasers, 2011, 38(5): 186～191

[4] M. B. Park, S. J. Hwang, N. H. Cho. Effect of the grain size and chemical features on the phase transiti on and physical characteristics of nano-grained BaTiO3 ceramics［J］. Materials Science and Engineering B, 2003, 99(1-3): 155～158

[5] Zeng Tao, Dong Xianlin, Mao Chaoliang. Effects of porosity and grain size s on the dielectric and piezoelectric properties of porous PZT ceramic sand their mechanism［J］. Acta Physica Sinica, 2006, 55(6): 3073～3078

[6] 王东生, 田宗军, 沈理达等. TiAl合金表面激光重熔复合陶瓷涂层温度场数值模拟及组织分析［J］. 中国激光, 2009, 36(1): 224～230

Wang Dongsheng, Tian Zongjun, Shen Lida et al.. Numerical simulation on the temperature field and microstructure analysis of laser remelting composite ceramic coating on TiAl alloy surface［J］. Chinese J. Lasers, 2009, 36(1): 224～230

[7] J. G. David. An Introduction to the Mechanical Properties of Ceramics［M］. London: Cambridge University Press, 1998. 210～231

[8] V. Sabari, R. Sarathi, S. R. Chakravarthy et al.. Studies on production and characterization of nano-Al2O3 powder using wire explosion technique［J］. Mater. Lett., 2004, 58(6): 1047～1050

[9] Y. H. Zhang, A. Weidenkaff, R. A. Relle. Mesoporous structure and phase transition of nanocrystalline TiO2［J］. Materials Letters, 2002, 54(5-6): 375～381

[10] D. D. Gu, Y. F. Shen, J. Xiao. Influence of processing parameters on particulate dispersion in direct laser sintered WC-Cop/Cu MMCs［J］. International Journal of Refractory Metals and Hard Materials, 2008, 26(5): 411～422

[11] Y. Wang, W. Tian, Y. Yang. Thermal shock behavior of nanostructured and conventional Al2O3/13% TiO2 coatings fabricated by plasma spraying［J］. Surface and Coatings Technology, 2007, 201(8): 7746～7753

[12] Wang Dongsheng, Tian Zongjun, Shen Lida et al.. Microstructural characteristics and formation mechanism of Al2O3-13% TiO2 coatings plasma-sprayed with nanostructured agglomerated powders［J］. Surface and Coatings Technology, 2009, 203(10-11): 1298～1303

[13] I. Levin, W. D. Kaplan, D. G. Brandon et al.. Effect of SiC submicrometer particle size and content on fracture toughness of Al2O3-SiC "nano composite"［J］. Journal of the American Ceramic Society, 1995, 78(1): 254～256

高雪松, 田宗军, 沈理达, 刘志东, 黄因慧. 激光熔覆Al₂O₃-13% TiO₂陶瓷层制备及其抗热震性能[J]. 中国激光, 2012, 39(2): 0203006. Gao Xuesong, Tian Zongjun, Shen Lida, Liu Zhidong, Huang Yinhui. Study on Al₂O₃-13% TiO₂ Coatings Prepared by Laser Cladding and Thermal Shock Resistance[J]. Chinese Journal of Lasers, 2012, 39(2): 0203006.

激光熔覆Al₂O₃-13% TiO₂陶瓷层制备及其抗热震性能

关于本站 Cookie 的使用提示

全站搜索