Microstructure evolution during field-assisted sintering of zirconia spheres

被引：28

作者：

Demirskyi, D. ^{[1
]}

Borodianska, H. ^{[1
,2
]}

Grasso, S. ^{[3
,4
]}

Sakka, Y. ^{[2
]}

Vasylkiv, O. ^{[2
]}

机构：

[1] NASU, Inst Problems Mat Sci, UA-03680 Kiev, Ukraine

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

[4] Queen Mary Univ London, Nanoforce Technol Ltd, London E1 4NS, England

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 08期

关键词：

Microwave heating; SPS; Sintering; Zirconia; Ceramics; ELECTRIC-FIELD; INITIAL-STAGE; PLASMA; DENSIFICATION; POWDER; CONSOLIDATION; CONDUCTIVITY; GROWTH; SPINEL;

D O I：

10.1016/j.scriptamat.2011.07.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure evolution during microwave-assisted sintering and spark plasma sintering of 50 mu m spherical powder is presented. The two microstructures formed are alike, and show unexpected details that cannot be explained just by conventional thermal and pressure effects; one also has to consider "field" effects. This also suggests that the driving force is similar. An explanation and analysis of the microstructure evolution is attempted based on the enhancement of the conductivity of zirconia when the heating temperature increases. The consequences are possible discharge effects at lower heating temperatures and high reversed heating gradients above 800-850 degrees C. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：683 / 686

页数：4

共 33 条

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