Effects of raw powders on microstructure and properties of Si3N4-based ceramics

被引：10

作者：

Bellosi, A ^{[1
]}

Babini, GN ^{[1
]}

机构：

[1] CNR, IRTEC, Res Inst Ceram Technol, I-48018 Faenza, Italy

来源：

SCIENCE OF ENGINEERING CERAMICS II | 1999年 / 2卷

关键词：

silicon nitride; powder treatments; additive systems; microstructure; properties;

D O I：

10.4028/www.scientific.net/KEM.161-163.203

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：

The effects of: - different Si3N4 powders, - different powder processing routes (mechanical-, ultrasonic-, attritor mixing of additive powders and chemical coprecipitation of metal hydroxides), - different sintering aid systems (La2O3+Y2O3, Al2O3+Y2O3, AlN+Y2O3) on microstructure and properties of hot pressed silicon nitride were evaluated and compared. All the properties: strength, hardness, toughness, Young's modulus, thermal expansion were related to the microstructural features (grain size and morphology, grain boundary phases, flaws) which are specific to a material and its process history.

引用

页码：203 / 208

页数：6

共 20 条

[1]

[Anonymous], 1975, PHASE DIAGRAMS CER S

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

ANSTIS, GR ;

CHANTIKUL, P ;

LAWN, BR ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538

[3]

*ASTM C, 1983, 84878 ASTM C

[4] MICROSTRUCTURAL DESIGN OF SILICON-NITRIDE WITH TAILORED PROPERTIES [J].

BELLOSI, A ;

BABINI, GN .

SILICON NITRIDE 93, 1994, 89-9 :117-121

[5]

BELLOSI A, 1997, NATO ASI SERIES, V25

[6]

BERTONI F, UNPUB

[7]

BERTONI F, UNPUB J MAT RES

[8] Alumina-coating of silicon nitride powder [J].

Wang, Chong-Min ;

Riley, F.L. .

Journal of the European Ceramic Society, 1992, 10 (02) :83-93

[9] CHARACTERIZATION AND STABILIZATION OF SI3N4 SUSPENSIONS [J].

GALASSI, C ;

RASTELLI, E ;

RONCARI, E ;

ARDIZZONE, S ;

CATTANIA, MG .

JOURNAL OF MATERIALS RESEARCH, 1995, 10 (02) :339-344

[10]

Galassi C., 1993, Processing of Advanced Materials, V3, P153

← 1 2 →