冷喷涂制备钛基复合涂层的研究进展

Research Progress in Preparation of Titanium Matrix Composite Coatings by Cold Spraying： A Review

摘要:

冷喷涂过程的低温特性带来了热输入小与涂层氧含量极低的特性，在制备氧化敏感的钛基涂层上有着极大的优势。结合冷喷涂在制备颗粒增强复合涂层方面的便利性，不仅能够弥补纯钛或钛合金材料耐磨性差的缺点，制备兼具良好力学性能与耐蚀耐磨的高性能涂层，而且在结构涂层与功能涂层的制备上也有很大的潜力。本文根据现有的研究报道，对冷喷涂钛基复合涂层制备过程中的沉积行为和机制进行总结；通过分析孔隙率和沉积效率，阐明强化相对冷喷涂钛基复合涂层的微观组织影响规律；揭示了强化相对钛基复合涂层的力学性能和摩擦磨损性能的作用机制。最后，对冷喷涂钛基复合涂层在未来的应用进行了展望，并列举了几个值得深入研究的方向。

Abstract:

Cold spraying has great advantages in preparation of oxidization-sensitive metallic coatings because of the lower heat input and almost no oxidation resulting from its low temperature process. Combined with the convenience of cold spraying in manufacturing particle reinforced composite coatings, titanium matrix composite coatings prepared by cold spraying can compensate for the shortcomings of poor wear resistance of pure titanium or titanium alloys. In addition, one can also get the functional coatings besides the structural coatings. According to the existing research reports, the deposition behaviors and mechanisms of cold-sprayed titanium matrix composite coatings were summarized. By analyzing the porosity and deposition efficiency, the effect of reinforcement on the microstructure of the cold-sprayed titanium matrix composite coatings was explained. The mechanism of reinforcement on mechanical and wear performance of titanium matrix composite coatings were revealed. Finally, the future application of cold-sprayed titanium matrix composite coatings is prospected, and several promising directions are listed.