Pressureless sintering of zirconium diboride using boron carbide and carbon additions

被引：158

作者：

Zhu, Sumin ^{[1
]}

Fahrenholtz, William G. ^{[1
]}

Hilmas, Gregory E. ^{[1
]}

Zhang, Shi C. ^{[1
]}

机构：

[1] Univ Missouri, Dept Mat Sci & Engn, Rolla, MO 65409 USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 11期

关键词：

D O I：

10.1111/j.1551-2916.2007.01936.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The synergistic roles of boron carbide and carbon additions in the enhanced densification of zirconium diboride (ZrB2) by pressureless sintering have been studied. ZrB2 was sintered to > 99% relative density at 1900 degrees C. The combination of 2 wt% boron carbide and 1 wt% carbon promoted densification by removing surface oxide impurities (ZrO2 and B2O3) and inhibiting grain growth. Four-point bending strength (473 +/- 43 MPa), Vickers' microhardness (19.6 +/- 0.4 GPa), fracture toughness (3.5 +/- 0.6 MPa.m(1/2)), and Young's modulus (507 GPa) were measured. Thermal gravimetry showed that the combination of additives did not have an adverse effect on the oxidation behavior.

引用

页码：3660 / 3663

页数：4

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