Preparation of zirconium diboride ceramics by reactive spark plasma sintering of zirconium hydride-boron powders

作者：Guo Shuqi^*; Nishimura Toshiyuki; Kagawa Yutaka

来源：Scripta Materialia, 2011, 65(11): 1018-1021.

DOI：10.1016/j.scriptamat.2011.09.007

• Zirconium diboride
• Zirconium hydride
• Boron
• Reactive spark plasma sintering

Monolithic ZrB2 ceramics were prepared by reactive spark plasma sintering of a ZrH2-B mixture at 1650-1800 degrees C. The microstructure of the resulting ZrB2 ceramics were characterized by X-ray diffractometry and scanning electron microscopy. The ZrH2 B mixture converted completely into ZrB2 without trace quantities of residual ZrH2 and B. Highly dense ZrB2 was obtained at 1750 degrees C or above. The elastic moduli, flexural strength, thermal and electrical conductivities were comparable with those of ZrB2 ceramics obtained by sintering conventional ZrB2 powders.

• 出版日期2011-12