钛合金表面Ta-W-Nb/TiN涂层的制备及表征

项目名称： 钛合金表面Ta-W-Nb/TiN涂层的制备及表征

项目编号： No.51301210

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 古一

作者单位： 中南大学

项目金额： 25万元

中文摘要： 随着现代工业技术的不断发展，钛和钛合金在各行各业中的用量越来越大，已成为世界各国竞相开发研究、应用的关键结构材料之一。但钛合金不耐烧蚀和冲刷等特性大大限制了其在高温、高压、高速且具烧蚀、冲刷及热震性气氛环境中的应用。本项目拟采用多弧离子镀技术在钛合金表面制备Ta-W-Nb/TiN复合涂层以提高其耐烧蚀、防冲刷性能。主要开展形成α-Ta相的微观组织调控研究，实现获得α-Ta相结构的Ta-W-Nb涂层；微观表征Ta-W-Nb/TiN/钛合金基体涂层与界面合金相微结构，建立Ta-W-Nb/TiN复合涂层α-Ta相热稳定性的热力学模型，有效控制Ta-W-Nb/TiN/基体界面元素扩散行为；研究Ta-W-Nb/TiN涂层的热塑性和与基体钛合金的原子键合机理，建立其抗热震破坏模型，揭示其抗裂纹萌生机理，为钛合金的高温应用提供理论基础和实践依据。

中文关键词： 钛合金；Ta-10W涂层；Ta-10W/TiN复合涂层；界面反应；多弧离子镀

英文摘要： Titanium and related alloys, as one group of the most promising structural materials, are play increasingly more important roles in many industrial applications. However, its poor performance in extreme environments with high pressure, high temerature, thermal shock, and serious corrosion risk, has retarded the further development of Titanium alloys. In this project, multi arc ion plating will be applied to fabricate the Ta-W-Nb/TiN composite coatings for improving the corrosion resistance of Titanium alloys. Following research efforts will include, but are not limited to, be focused on the microstructure controlling and characterization of of α-phase Ta and possible interfacial phases in the coatings, thermodynamic modeling of the thermal stabilities of the Ta-W-Nb/TiN composite for effectively controlling the inter-diffusion of Ta-W-Nb/TiN/substrate; analyese on thermal plasticity of Ta-W-Nb/TiN coatings as well as interfacial bonding nature , clarification on crack nucleation mechanisms by , where and modeling of thermal shock resistance. The knowledge obtained from these researches will help provide theoretical ground and practical guidance for high temperature applications of titanium and its alloys.

英文关键词： titanium alloys；Ta-10W coatings；Ta-10W/TiN composite coating；interfacial reaction；multi-arc ion plating