Reactive hot-pressing of ZrB2-ZrC-SiC ceramics via direct addition of SiC. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Lu, Ying; Zhang, Guo-Jun; Liu, Ji-Xuan; Liu, Hu-Lin; Wang, Xin-Gang; Xu, Fang-Fang
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 16474
• Page End: 16479
• Publication Date: 2016-11-15
• Subjects: Reactive hot-pressing -- Zirconium diboride -- Micro-layered structure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.06.167
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A series of ZrB2 -ZrC-SiC composites with various SiC content from 0 to 20 vol% were prepared by reactive hot-pressing using Zr, B4 C and SiC as raw materials. Self-propagating high-temperature synthesis (SHS) occurred, and ZrC grains connected each other to form a layered structure when the SiC content is below 20 vol%. The evolution of microstructure has been discussed via reaction processes. The composite with 10 vol% SiC presents the most excellent mechanical properties (four-point bending strength: 828.6±49.9 MPa, Vickers hardness: 19.9±0.2 GPa) and finest grain size (ZrB2 : 1.52 µm, ZrC: 1.07 µm, SiC: 0.79 µm) among ZrB2 -ZrC-SiC composites with various SiC content from 0 to 20 vol%.