Silicon Carbide Whiskers Interference on Silicon Nitride Based Composite

被引：0

作者：

Baldacim, Sandro A. ^{[1
]}

dos Santos, Claudinei ^{[2
]}

Silva, Oliverio M. M. ^{[1
]}

Silva, Cosme R. M. ^{[3
]}

机构：

[1] CTA IAE AMR, Pca M Ar Eduardo Gomes 50, BR-12228904 Sao Jose Dos Campos, SP, Brazil

[2] DEMAR EEL USP, Polo Urbo ind, BR-12600000 Lorena, SP, Brazil

[3] Campus Univ Darcy Ribeiro, UNB, DEM, BR-70910900 Brasilia, DF, Brazil

来源：

ADVANCED POWDER TECHNOLOGY VI | 2008年 / 591-593卷

关键词：

Ceramics composites; rare earth concentrate (CRE); sintering additives;

D O I：

10.4028/www.scientific.net/MSF.591-593.543

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：

Silicon nitride based composite has been prepared, using a direct mixture process as alternative route. Silicon carbide whiskers were mixed directly to silicon nitride based powders containing yttrium and neodymium oxide as sintering aids. Uniaxial hot pressing was used to prepare sintered samples. Crystalline phases were identified using x-ray diffractometry. Intergranular phases were analyzed using Scanning Electron Microscopy. Some mechanical properties (microhardness and fracture toughness) were also evaluated. The obtained high values of fracture toughness were correlated to the activation of toughening mechanisms, such as crack bridging and crack deflection.

引用

页码：543 / +

页数：2

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