Deposition and oxidation behaviour of molybdenum disilicide coating on Nb based alloys substrate by combined AIP/HAPC processes. Issue 8 (1st June 2019)

• Record Type: Journal Article
• Authors: Liu, L.; Lei, H.; Gong, J.; Sun, C.
• Is Part Of: Ceramics international. Volume 45:Issue 8(2019)
• Page Start: 10525
• Page End: 10529
• Publication Date: 2019-06-01
• Subjects: Metal coatings -- Superalloys -- Oxidation -- Microstructure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.02.115
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A MoSi2 coating was prepared on Nb-10Hf-1Ti alloys by a two-step process. The first step was arc ion plating (AIP) of the Mo layer, and the second step was halide-activated pack cementation (HAPC) of Si. The coating is composed of an outer layer of MoSi2 and an inner bond layer. After oxidation testing at 1200 °C for 100 h in a static air atmosphere, the mass gain of the coated specimen was 0.64 mg/cm 2 . The good oxidation resistance of the MoSi2 coating is attributed to the protective SiO2 scale generated by the oxidation process.