Sintering behavior in zirconium phosphate bonded silicon nitride porous ceramics

被引：13

作者：

Chen, Fei ^{[1
]}

Shen, Qiang ^{[1
]}

Schoenung, Julie M. ^{[2
]}

Zhang, Lianmeng ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 497卷 / 1-2期

关键词：

Si3N4; Zirconium phosphate; Sintering behavior; Porosity; Mechanical properties;

D O I：

10.1016/j.msea.2008.07.071

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new method for preparing high bending strength porous silicon nitride ceramics with controlled porosity has been developed by using a pressureless sintering technique with zirconium phosphate (ZrP2O7) as a binder phase. The sintering behavior in these porous ceramics is investigated in this study by using XRD, SEM, and HRTEM analysis. The results show that the sintering process can be divided into two stages: one is at temperatures below 250 degrees C, during which ZrO2 can react completely with H3PO4 to form ZrP2O7, and a ZrP2O7 bonded Si3N4 porous structure is formed; the other is at temperatures above 250 degrees C, at which solid state sintering of the ZrP2O7 dominates and a continuous open porosity network is obtained. The effect of the ZrP2O7 binder content on sintering behavior, porosity and mechanical properties is also investigated. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：495 / 500

页数：6

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