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Titolo:
Effect of initial alpha-phase content of SiC on microstructure and mechanical properties of SiC-TiC composites
Autore:
An, HG; Kim, YW; Lee, JG;
Indirizzi:
Univ Seoul, Dept Mat Sci & Engn, Seoul 130743, South Korea Univ Seoul Seoul South Korea 130743 ci & Engn, Seoul 130743, South Korea Korea Adv Inst Sci & Technol, Div Ceram, Seoul 130650, South Korea Korea Adv Inst Sci & Technol Seoul South Korea 130650 30650, South Korea
Titolo Testata:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
fascicolo: 1, volume: 21, anno: 2001,
pagine: 93 - 98
SICI:
0955-2219(200101)21:1<93:EOIACO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOUGHENED SILICON-CARBIDE; FRACTURE-TOUGHNESS; BETA->ALPHA TRANSFORMATION; CERAMICS;
Keywords:
composites; mechanical properties; microstructure; SiC-TiC; TiC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, YW Univ Seoul, Dept Mat Sci & Engn, 90 Jeonnong Dong, Seoul 130743, South Korea Univ Seoul 90 Jeonnong Dong Seoul South Korea 130743 South Korea
Citazione:
H.G. An et al., "Effect of initial alpha-phase content of SiC on microstructure and mechanical properties of SiC-TiC composites", J EUR CERAM, 21(1), 2001, pp. 93-98

Abstract

By using alpha- and beta -SiC starting powders, the effects of initial alpha -phase content of SiC on microstructure and mechanical properties of thehot-pressed and subsequently annealed SiC-30 wt.% TiC composites were investigated. The microstructures developed were analyzed by image analysis. Their microstructures consist of uniformly distributed elongated alpha -SiC grains, equiaxed TiC grains and an amorphous grain boundary phase. During annealing, the beta-->alpha phase transformation of SiC leads to the in-situ growth of elongated alpha -SiC grains. The average diameter of SiC increases with increasing alpha -SiC content in the starting powder and the aspect ratio shows a maximum at 1% alpha -SiC and decreases with increasing alpha -SiC content in the starting powder. Such results suggest that microstructure of SiC-TiC composites can be controlled by changing alpha -SiC content in the starting powder. The strength increased with increasing alpha -SiC content when alpha -SiC content is higher than 10% while the fracture toughness decreased with increasing alpha -SiC content, i.e. the same trend with the variation of aspect ratio of SIC in the composites. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 01:59:51