Two-step sintering of nanocrystalline 8Y2O3 stabilized ZrO2 synthesized by glycine nitrate process

被引：94

作者：

Mazaheri, Mehdi ^{[1
]}

Valefi, M. ^{[1
]}

Hesabi, Z. Razavi ^{[1
]}

Sadrnezhaad, S. K. ^{[1
]}

机构：

[1] Mat & Energy Res Ctr, Tehran, Iran

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 01期

关键词：

8Y-FSZ; Two-step sintering; Nanocrystalline; Fracture toughness; GRAIN-GROWTH BEHAVIOR; FRACTURE-TOUGHNESS; ZIRCONIA; DENSE; CERAMICS; SIZE; ELECTROLYTE; ALUMINA; DENSIFICATION; FABRICATION;

D O I：

10.1016/j.ceramint.2007.09.009

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：

Two-step sintering was employed to consolidate nanocrystalline 8 mol% yittria stabilized zirconia processed by glycine-nitrate method. Results verified the applicability of this method to suppress the final stage of grain growth in the system. The grain size of the high density compacts (>97%) produced by two-step sintering method was seven times less than the pieces made by the conventional sintering technique. Up to similar to 96% increase in the fracture toughness was observed (i.e. from 1.61 to 3.16 MPa m(1/2)) with decreasing of the grain size from similar to 2.15 to similar to 295 nm. A better densification behavior was also observed at higher compacting pressures. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：13 / 20

页数：8

共 47 条

[1] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].