温和条件下铼及铼合金涂层制备技术研究进展

Research Progress on the Preparation of Rhenium and Rhenium Alloy Coatings Under Mild Conditions

摘要:

铼具有优异的物理化学性能，作为超高温结构材料、表面散热涂层等在航空航天和军事领域具有重要应用。Re涂层的制备方法有多种，但主流制备技术沉积温度高、沉积环境多含有腐蚀性气氛，对大多数难熔金属基体有腐蚀，无法在难熔金属及合金基体表面获得致密且结合良好的Re涂层，限制了其在难熔金属表面高温防护等方面的应用，而温和条件下Re涂层的制备技术有望解决此问题。本文综述了水溶液电沉积、金属有机化学气相沉积、电子束-物理气相沉积3种温和条件下Re涂层制备方法的研究现状，总结了不同方法制备Re涂层的工艺及其典型组织结构特征，并对下一步研究方向进行了展望。

Abstract:

Rhenium has excellent physical and chemical properties, and has important applications in aerospace and military fields as ultra-high temperature structural material and surface cooling coating. There are many preparation methods for Re coating, but the mainstream preparation techniques require high deposition temperatures and corrosive atmosphere, which corrodes most refractory metal substrates. As a result, the dense and well-bonded Re coatings are hardly prepared on refractory metal and alloy substrate surfaces, which restricts its application in high temperature protection of refractory metal surface. The preparation technique of Re coating under mild conditions is expected to solve this problem. The research status of Re coating preparation methods under three mild conditions were reviewed: aqueous electrodeposition, MOCVD, and EB-PVD. The preparation processes and typical structure characteristics of Re coating prepared by different methods are summarized, and the future research direction is prospected.