Synthesis of porous Si3N4 ceramics with rod-shaped pore structure

被引：41

作者：

Yang, HF ^{[1
]}

Zhang, GJ

Kondo, N

Ohji, T

Kanzaki, S

机构：

[1] Xian Jiaotong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Natl Inst Adv Ind Sci & Technol AIST, Adv Mfg Res Inst, Nagoya, Aichi 4638560, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2005年 / 88卷 / 04期

关键词：

D O I：

10.1111/j.1551-2916.2005.00199.x

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：

Porous Si3N4 ceramics were synthesized by pressureless sintering of green compacts prepared using slip casting of slurries containing Si3N4, 5 Wt% Y2O3 + 2 wt% Al2O3, and 0-60% organic whiskers composed of phenol-formaldehyde resin with solids loading up to 60 wt%. Rheological properties of slurries were optimized to achieve a high degree of dispersion with a high solid-volume fraction. Samples were heated at 800 degrees C in air and sintered at 1850 degrees C in a N-2 atmosphere. Porosities ranging from 0% to 45% were obtained by the whisker contents (corresponding to 0-60 vol% whisker). Samples exhibited a uniform pore distribution. Their rod-shaped pore morphology originated from burnout of whiskers, and an extremely dense Si3N4 matrix.

引用

页码：1030 / 1032

页数：3

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