Sintering properties and thermal depletion of boron in zirconia-zirconium diboride conductive ceramic

被引：5

作者：

Chew, W. J. Kelvin ^{[1
]}

Amiriyan, M. ^{[2
]}

Yaghoubi, A. ^{[3
]}

Ramesh, S. ^{[1
]}

Purbolaksono, J. ^{[1
]}

Tolouei, R. ^{[4
]}

Teng, W. D. ^{[5
]}

Agrawal, D. K. ^{[6
]}

机构：

[1] Univ Malaya, Dept Mech Engn, Ctr Adv Mfg & Mat Proc, Kuala Lumpur 50603, Malaysia

[2] Univ Laval, Dept Min Met & Mat Engn, Quebec City, PQ G1V 0A6, Canada

[3] Univ Malaya, Ctr High Impact Res, Kuala Lumpur 50603, Malaysia

[4] Univ Laval, Lab Biomat & Bioengn, Quebec City, PQ G1V 0A6, Canada

[5] SIRIM Berhad, Ceram Technol Grp, Shah Alam 40911, Malaysia

[6] Penn State Univ, Microwave Proc & Engn Ctr, University Pk, PA 16802 USA

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 08期

关键词：

Sintering; Composites; Electrical conductivity; Functional applications; CRACK DEFLECTION PROCESSES; ELECTRICAL-RESISTIVITY; MECHANICAL-PROPERTIES; PRESSURELESS; TRANSFORMATION; DENSIFICATION; COMPOSITES; OXIDE; OXIDATION; BEHAVIOR;

D O I：

10.1016/j.ceramint.2014.05.045

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：

Zirconium diboride (ZrB2) as an ultrahigh temperature ceramic (UHTC) with excellent electrical conductivity is a potential candidate for harsh-environment devices. Fabrication of ZrB2-based materials however involves processing in the active oxidation regime (T > 1200 K) leading to depletion of boron. We report a simple technique to prevent degradation during pressureless sintering of zirconia-matrix composites of ZrB2. The composites prepared using this method reach the percolation threshold at similar to 10 wt% ZrB2 and metal-like conductivity (similar to 10(5) S/m) at 25 wt% ZrB2 in agreement with the general effective media theory. The improved mechanical properties are also discussed in terms of various toughening mechanisms. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：13313 / 13320

页数：8

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