Fabrication of ZrB2 ceramics by reactive hot pressing of ZrB and B. Issue 12 (30th July 2018)

• Record Type: Journal Article
• Authors: Liu, Limeng; Hou, Zhaoping; Zhao, Yanwei; Geng, Guihong; Wang, Yujin
• Is Part Of: Journal of the American Ceramic Society. Volume 101:Issue 12(2018)
• Page Start: 5294
• Page End: 5298
• Publication Date: 2018-07-30
• Subjects: mechanical properties -- microstructure -- reactive hot pressing -- zirconium diboride; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.15949
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Zirconium diboride (ZrB2 ) ceramics were prepared by reactive hot pressing of ZrB+B powder mixture. Formation of a transient liquid due to eutectic reaction of ZrB2 +Zr→ L eu(ZrB2+Zr) at 1661°C following peritectic decomposition of 2ZrB=ZrB2 +Zr at 1250°C during heating up of the ZrB+B mixture facilitated densification. The liquid phase was subsequently eliminated via reaction of B with Zr in the eutectic liquid L eu(ZrB2+Zr) to result in a dense ZrB2 ceramic. Full density was reached after reactive hot pressing at 1900°C under 30 MPa for 1 h. The ZrB2 ceramic had a refined microstructure consisting of grains of <1.5 μm in size and relatively good Vickers hardness (21 ± 2 GPa) and flexural strength (595 ± 63 MPa).