R-curve behavior, mechanical properties and microstructure of sintered ZrB2-SiCp-ZrO2f ceramics

被引：9

作者：

Lin Jia ^{[1
]}

Zhang Xinghong ^{[1
]}

Cao Huijun ^{[2
]}

Jin Hua ^{[1
]}

Han Wenbo ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 08期

关键词：

Hot pressing; Fibers; Fracture; Structural applications; STRENGTH; SIZE;

D O I：

10.1016/j.jeurceramsoc.2012.01.028

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：

In this paper, zirconium diboride based ceramics added with 20 vol.% silicon carbide particle and 15 vol.% zirconia fiber (Z20S(p)15Z(f)) were prepared by hot-pressing at 1850 degrees C for 60 min under a uniaxial load of 30 MPa in Ar atmosphere. R-curves for Z20S(p)15Z(f) ceramics were studied using the indentation-strength in bending technique and the envelope method. The results indicated that these two testing methods were consistent and viable for estimating R-curve. Z20S(p)15Z(f) ceramics had high resistance to crack growth and damage tolerance with the 6.8 MPa m(1/2) of steady-state toughness. The toughening mechanism was fiber debonding, fiber pull-out, crack bridging, crack branching, crack deflection and transformation toughening. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1743 / 1749

页数：7

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