Mechanical and ablation properties of laminated ZrB2-SiC ceramics with Si3N4 whisker interface. (1st April 2022)

• Record Type: Journal Article
• Authors: Wei, Chuncheng; Zhang, Zhongya; Ma, Xuefei; Liu, Lanyong; Wu, Yun; Li, Daoqian; Wang, Peng; Duan, Xianghan
• Is Part Of: Corrosion science. Volume 197(2022)
• Publication Date: 2022-04-01
• Subjects: Laminated ceramics -- ZrB2 -- Ablation resistance -- Thermal conductivity -- Finite element analysis; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.110051
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: Laminated ZrB2 -SiC/Si3 N4w ceramics were prepared by using Si3 N4 whiskers as interface layer. Toughness of the laminated ceramics was remarkable improved, because of the deflection and bifurcation of crack. Moreover, the laminated ZrB2 -SiC/Si3 N4w ceramics showed better ablation resistance than monolithic ZrB2 -SiC ceramics, which was tested at 3000 °C for 100 s. Higher thermal conductivity of laminated ceramics than that of monolithic ceramics in both the in-plane direction and through-plane direction, leads to faster heat transfer in laminated ceramics during the ablation process. Highlights: The toughness of laminated ZrB2 -SiC ceramics with Si3 N4 whiskers as strong interfaces was improved to 18.9 MPa·m 1/2 . Laminated ZrB2 -SiC/Si3 N4w remained intact after ablation at 3000 °C for 100 s. The laminated ZrB2 -SiC/Si3 N4w ceramics have high thermal conductivity than ZrB2 -SiC ceramics at high temperature. The laminated ZrB2 -SiC ceramics show better ablation resistance due to the addition of Si3 N4 whiskers.