METHOD FOR PREPARING OXIDATION-RESISTANT COATING FOR PURE TUNGSTEN BY MODIFYING WITH RARE EARTH ELEMENT YTTRIUM AND ALUMINIZING BY EMBEDDING

摘要

#$%^&*AU2020100541A420200521.pdf#####ABSTRACT The present invention discloses a method for preparing an oxidation-resistant coating for pure tungsten by modifying with a rare earth element (REE) yttrium (Y) and aluminizing by embedding. The surface of the tungsten is modified with the REE Y and is aluminized by embedding. The surface of the obtained coating exhibits uniform granular protrusions without obvious voids or cracks. The Y-modified and aluminized coating of the present invention effectively overcomes the easy stripping defect of the aluminide coating. The coating was tested by 1000°C cyclic oxidation. After the Ymodified aluminide coating was oxidized for 10 h, an oxide film on the surface of the coating was dense and complete without stripping, showing excellent high-temperature oxidation resistance.