Effect of N content on microstructure and properties of (AlTiCrNiTa)N coatings for accident-tolerant fuels. (December 2022)

• Record Type: Journal Article
• Authors: Zhao, Sha; Liu, Chunhai; Li, Zhuo; Zhang, Wei; Xiang, Yang; He, Hengji; He, Linxin; Yang, Hongyan; Liu, Ning; Chang, Hong; Yang, Jijun
• Is Part Of: Intermetallics. Volume 151(2022)
• Publication Date: 2022-12
• Subjects: Accident-tolerant fuel coating -- HEA nitride Coatings -- Corrosion properties -- High-temperature steam oxidation mechanism; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2022.107728
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: The (AlTiCrNiTa)N coatings were successfully deposited on Zr-4 substrates by magnetron sputtering technology as a function of N2 /Ar gas pressure ratio Γ . The microstructure, wettability properties, mechanical properties, corrosion properties and high-temperature steam oxidation resistance of the coatings were investigated. With the decrease of Γ, N content and the thickness of the coating decreased. All coatings show a simple NaCl-type face-centered cubic (FCC) structure, exhibit hydrophobic surface and own high hardness. When Γ is 1/8, the (AlTiCrNiTa)N coating had excellent corrosion properties and high-temperature steam oxidation properties. Highlights: Effect of N2 /Ar gas pressure ratio Γ on structure and properties of (AlTiCrNiTa)N coating was studied. When Γ is 1/8, (AlTiCrNiTa)N coating shows excellent comprehensive performances and high temperature performance. Proper introduction of the N element can effectively improve properties of the coating.