Characteristics of Al2O3-Pt/YSZ-Pt Double Layer Composite Coatings Prepared by Cathode Plasma Electrolytic Deposition. Issue 12 (December 2018)

• Record Type: Journal Article
• Authors: Shunjie, Deng; Chi, Jiang; Tianwei, Liu; Maobing, Shuai; Peng, Wang
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 12(2018)
• Page Start: 3590
• Page End: 3596
• Publication Date: 2018-12
• Subjects: cathode plasma electrolytic deposition -- high-temperature oxidation resistance -- composite coating -- toughening effect; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(19)30003-7
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: Al2 O3 -Pt/YSZ-Pt double layer composite coatings were prepared by cathode plasma electrolytic deposition (CPED) on the superalloy with a NiCoCrAlY bond-coat. The composite coatings consist of an Al2 O3 -Pt film and a YSZ-Pt top-coat and show a good adhesion to the metallic bond-coat. It is demonstrated, from the cyclic oxidation test and mechanical properties test, that such coatings possess good oxidation and spallation resistance. These beneficial results can be attributed to these effects: owing to the extremely low oxygen diffusion rate of Al2 O3 -Pt film, such composite coatings can inhibit further oxidation of the bond-coat; the mechanical properties of Al2 O3 -Pt/YSZ-Pt composite coating are improved by the toughening effect of Pt particles.