Oxidation of TaB2-SiC coatings prepared by spark plasma sintering and effect of pre-oxidation treatments. Issue 13 (October 2022)

• Record Type: Journal Article
• Authors: Chen, Yuexing; Wang, Peipei; Ren, Xuanru; Zhang, Menglin; Kan, Tengfei; Wu, Binbin; Du, Haobo; Zhao, Yan; Yang, Chunmin; Feng, Peizhong
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 13(2022)
• Page Start: 5238
• Page End: 5248
• Publication Date: 2022-10
• Subjects: TaB2 -- Coating -- Spark plasma sintering (SPS) -- Oxidation -- Oxygen permeability; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.06.003
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: To suppress the oxidation of TaB2 -SiC coatings, the effects of pre-oxidation temperature on the oxygen hindering properties of TaB2 -SiC coatings were investigated to prepare TaB2 -SiC coatings with enhanced oxidation behavior. The addition of 40 wt% TaB2 made the oxygen permeability of the coating decrease by 62.16%. However, excessive TaB2 weakened the oxygen hindering ability of the coating due to the large ion complex ability of Ta 5+ . The pre-oxidation temperature at 1500 °C led to a homogeneous dispersion of Ta-oxide nanocrystal particles in the Ta-B-Si-O complex-phase glass layer. In contrast with the untreated samples, the active factor and inert factor values of the TaB2 -SiC coating after pre-oxidation treatment at 1500 °C decreased by 43.12% and 17.33%, respectively, which improved the dynamic stability of the coating during oxidation.