(Aerospace Research Institute of Material & Processing Technology ,Beijing 100076， China)
Keywords:
-
CLC:
PACS:
-
DOI:
10.7502/j.issn.1674-3962.2013.04.02
DocumentCode:
Abstract:
The overview is about the development and trend of high temperature oxidation resistance coatings on refractory metals. Silicide coatings on Nb alloy have been using widely, as glass phase SiO2 is formed at high temperature oxidation environment. Re/Ir is considered as best material of high temperature oxidation resistance, and the life of Ir coating is affected by thickness and compactness. In China, three generations materials used for 1 200~2 000 ℃have been developed, including 1st generation NbHf alloy using silicide coating, 2nd generation NbW alloy using silicide coating and 3rd generation Re using Ir coating. The 1st and 2st have been used to satellite and airships. Now engineering application study of the Re/Irmaterial is proceeding. Short nozzle of Re/Ir has been tested, and the temperature of combustion chamber wall reached 2 090 ℃,for 300 s without failure.