Ablative properties of laminated ZrB2-SiC ceramic modified by SiC whisker in oxyacetylene environment. (15th April 2021)

• Record Type: Journal Article
• Authors: Ma, Xuefei; Wei, Chuncheng; Liu, Ruixiang; Li, Shuang; Zhang, Zhongya; Liu, Lanyong; Wang, Peng; Wang, Yishan
• Is Part Of: Corrosion science. Volume 182(2021)
• Publication Date: 2021-04-15
• Subjects: Laminated ceramic -- SiC whisker -- High temperature corrosion -- Long-term -- Ablative properties; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109283
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: SiC whisker as interface layer ensured the high toughness of laminated ceramics. Laminated ZrB2 -SiC/SiCw remained intact after ablation at 3000 °C for 100 s. SiCw reduced surface temperature of the ceramic for its high thermal conductivity. SiO2 layer enhanced the oxidation protection and interfacial bonding strength. Abstract: To improve the long-term service of existing laminated ceramics at ultra-high temperature, laminated ZrB2 -SiC/SiCw (ZSS) ceramic was prepared by hot-pressing with SiCw (SiC-whisker) as interface layer. After ablated in oxyacetylene at 3000 °C for 100 s, the structure of ZSS remained intact and the linear and mass ablation rates were 0.12 ± 0.03 μm s −1 and 0.43 ± 0.09 mg s −1, respectively. Such excellent ablation resistance of ZSS was attributed to the reduction of the surface temperature and the formation of SiO2 layer by SiC whisker, which resulted in prominent oxidation protection and strong bonding strength at interface.