The effect of carbon nanotubes on the sintering behaviour of zirconia

被引：36
|
作者：
Milsom, Ben [1 ]
Viola, Giuseppe [2 ]
Gao, Zhipeng [1 ]
Inam, Fawad [3 ]
Peijs, Ton [1 ,2 ]
Reece, Michael J. [1 ,2 ]
机构：
[1] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
[2] Queen Mary Univ London, Nanoforce Technol LTD, London E1 4NS, England
[3] Glyndwr Univ, Wrexham LL11 2AW, Wales
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
Sintering; Nanocomposites; ZrO2; Carbon; ACTIVATION-ENERGY; GRAIN-GROWTH; MICROSTRUCTURE; COMPOSITES; KINETICS; ALUMINA;
D O I：
10.1016/j.jeurceramsoc.2012.07.028
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：
The sintering behaviour and activation energy of Y2O3 partially stabilised ZrO2 and ZrO2-CNT (0.5 and 2 vol%) composites was determined using spark plasma sintering (SPS) under isothermal conditions. The sintering activation energy for the Y2O3 partially stabilised ZrO2 was found to be 456 kJ/mol. The addition of 2 vol% CNTs reduced the sintering activation energy to 172 kJ/mol. The significant reduction of the activation energy with the addition of only 2 vol% CNTs is attributed to the formation of a percolating network of CNTs providing a lower energy diffusion pathway. The sintering mechanism was found to be grain boundary diffusion for all samples suggesting that the presence of CNTs does not change the sintering mechanism but does lower the activation energy for the rate limiting step in the sintering process. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4149 / 4156
页数：8
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