High temperature mechanical properties of laminated ZrB2–SiC based ceramics. Issue 16 (December 2016)

• Record Type: Journal Article
• Authors: Wei, Chuncheng; Liu, Xinchao; Niu, Jinye; Feng, Liu; Yue, Hongzhi
• Is Part Of: Ceramics international. Volume 42:Issue 16(2016)
• Page Start: 18148
• Page End: 18153
• Publication Date: 2016-12
• Subjects: Laminated ceramics -- ZrB2 -- High temperature -- Flexural strength; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.08.129
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Two laminated ZrB2 -SiC based ceramics were prepared by tape casting and subsequent hot pressing, with BN (LZB) and graphite (LZG ) as interface layers. The LZB specimen presents flexural strength of 381 MPa at room temperature and 111 MPa at 1500 °C; while the LZG specimen shows flexural strength of 414 MPa at room temperature and 377 MPa at 1500 °C. In addition, the flexural strength of LZG specimen is always higher than that of the LZB specimen in the temperature range from room temperature to 1500 °C. Such higher strength is attributed to the healing of surface microcracks and pores by the SiO2 glass phase, producing less glass phase in graphite interface layers at high temperature.