Effects of powder processing on colloidal and microstructural characteristics of β-SiC powders

被引：11

作者：

Balbo, Andrea ^{[1
]}

Sciti, Diletta ^{[1
]}

Costa, Anna L. ^{[1
]}

Bellosi, Alida ^{[1
]}

机构：

[1] CNR, ISTEC, Inst Sci & Technol Ceram, I-48018 Faenza, Italy

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 103卷 / 01期

关键词：

ceramics; coprecipitation; sintering; microstructure;

D O I：

10.1016/j.matchemphys.2007.01.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three different powder processing methods for introducing sintering aids (yttria and alumina) into a commercial silicon carbide powder are studied: mechanical mixing, heterocoagulation and coprecipitation. The surface characteristics of therawpowders and powder mixtures are analysed by acoustophoretic measurements and compared. The effectiveness of the coprecipitation process for additivation is evaluated by the comparison of ESA measurements and by TEM observations. The powder mixtures are pressureless sintered in argon atmosphere and the microstructure of the sintered materials is analysed. The coprecipitation process allows a higher final density to be obtained in a shorter sintering time, with a finer and more homogeneous microstructure. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：70 / 77

页数：8

共 37 条

[1]

BAUD S, 1999, 9 CIMT WORLD CER C B, P805

[2]

Bellosi A, 1997, NATO ASI 3 HIGH TECH, V25, P197

[3] Surface modification of Si3N4 powders by coprecipitation of sintering aids [J].

Bertoni, F ;

Galassi, C ;

Ardizzone, S ;

Bianchi, CL .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1999, 82 (10) :2653-2659

[4]

BOECKER W, 1991, INTERCERAMICS, V40, P520

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

Wang, Chong-Min ;

Riley, F.L. .

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

[6] New process for the preparation of pigment-coated phosphors on the base of electroacoustic characterization [J].

Costa, AL ;

Bezzi, G ;

La Torretta, TMG ;

Verna, S .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (9-10) :1667-1672

[7]

DJURICIC B, 1995, SILIC IND, V60, P203

[8] Progress in silicon-based non-oxide structural ceramics [J].

Dressler, W ;

Riedel, R .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 1997, 15 (1-3) :13-47

[9] Microstructural development during liquid phase sintering of silicon carbide ceramics [J].

Falk, LKL .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1997, 17 (08) :983-994

[10]

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

← 1 2 3 4 →