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

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.