Title of article
ZrB2-ceramic toughened by refractory metal Nb prepared by hot-pressing
Author/Authors
Xin Sun، نويسنده , , Wenbo Han، نويسنده , , Qiang Liu، نويسنده , , Ping Hu، نويسنده , , Changqing Hong، نويسنده ,
Issue Information
ماهنامه با شماره پیاپی سال 2010
Pages
5
From page
4427
To page
4431
Abstract
ZrB2–Nb (ZN) composites were prepared through hot-pressing at a temperature of 1800 °C. A contribution of Nb was believed a significant influence on the sinterability, microstructure and mechanical properties of ZN composites. The values of flexural strength of ZN composites rang from 395 to 773 MPa, who are dependent on Nb contents. The highest strength obtained for the ZN composite containing 25 vol.% Nb (773 MPa). A fracture toughness of 7.1 MPa m1/2 of ZN was revealed, which was much higher than that of monolithic ZrB2. The improvement in fracture toughness strongly depended on an introduction of Nb–ZrB2 matrix. Crack deflection and branching were believed to be the toughening mechanism of ZN.
Journal title
Materials and Design
Serial Year
2010
Journal title
Materials and Design
Record number
1069243
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