通过等离子喷涂工艺制备了不同碳纳米管含量的CNTs/Al2O3复合涂层,系统研究了碳纳米管含量对涂层孔隙率、洛氏硬度和断裂韧性的影响规律.实验结果表明:采用喷雾干燥工艺制备的CNTs/Al2O3颗粒为球形,CNTs均匀分布在团聚颗粒的表面;部分CNTs经等离子喷涂后保留在沉积涂层内部并且与Al2O3基体形成冶金结合,起到一定桥接作用.涂层孔隙率和洛氏硬度值均随CNTs含量的增加呈现降低的趋势.随CNTs含量从6％(质量分数)增加到12％(质量分数),CNTs增韧效果的增强和涂层孔隙率的降低导致涂层断裂韧性值从48 MPa增加到90 MPa.
参考文献
| [1] | Nakao W;Ono M;Lee S K et al.Critical crack-healing condition for SiC whisker reinforced alumina under stress[J].Journal of the European Ceramic Society,2005,25:3649. |
| [2] | Michele T. Byrne;Yurii K. Gun'ko .Recent Advances in Research on Carbon Nanotube-Polymer Composites[J].Advanced Materials,2010(15):1672-1688. |
| [3] | Katja K6nig;Sasa Novak;Aljaz Ivekovic .Fabrication of CNT-SiC/SiC composites by electrophoretic deposition[J].Journal of the European Ceramic Society,2010(5):1131-1137. |
| [4] | Pei, X.;Wang, J.;Wan, Q.;Kang, L.;Xiao, M.;Bao, H. .Functionally graded carbon nanotubes/hydroxyapatite composite coating by laser cladding[J].Surface & Coatings Technology,2011(19):4380-4387. |
| [5] | Anup Kumar Keshri;Riken Patel et al.Comprehensive process maps to synthesize high density plasma sprayed aluminum oxide composite coatings with varying carbon nanotube content[J].Surface and Coatings Technology,2010,205:690. |
| [6] | Sun Jing et al.Reinforcement of alumina matrix with multiwalled carbon nanotubes[J].CERAMICS INTERNATIONAL,2005,31:893. |
| [7] | Balani K;Agarwal A .Process map for plasma sprayed aluminum oxide-carbon nanotube nanocomposite coatings[J].Surface & Coatings Technology,2008(17):4270-4277. |
| [8] | Kantesh Balani;Srinivasa Rao Bakshi;Yao Chen et al.Role of powder treatment and carbon nanotube dispersion in the fracture toughening of plasma-sprayed aluminum oxide-carbon nanotube nanocomposite[J].J Nanosci Nanotechn,2007,7:1. |
| [9] | Afzal, M.;Ajmal, M.;Nusair Khan, A.;Hussain, A.;Akhter, R..Surface modification of air plasma spraying WC-12%Co cermet coating by laser melting technique[J].Optics & Laser Technology,2014:202-206. |
| [10] | Srimvas R. Bakshi;Kantesh Balani;Arvind Agarwal .Thermal Conductivity of Plasma-Sprayed Aluminum Oxide-Multiwalled Carbon Nanotube Composites[J].Journal of the American Ceramic Society,2008(3):942-947. |
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