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Titolo:
In situ processing of TiB2/TiC ceramic composites by thermal explosion under pressure: experimental study and modeling
Autore:
Klinger, L; Gotman, I; Horvitz, D;
Indirizzi:
Technion Israel Inst Technol, Dept Mat Engn, IL-32000 Haifa, Israel Technion Israel Inst Technol Haifa Israel IL-32000 L-32000 Haifa, Israel
Titolo Testata:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
fascicolo: 1, volume: 302, anno: 2001,
pagine: 92 - 99
SICI:
0921-5093(20010415)302:1<92:ISPOTC>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-TEMPERATURE SYNTHESIS; COMBUSTION SYNTHESIS; REACTIVE SYNTHESIS; MATRIX COMPOSITES; TITANIUM CARBIDE; POWDER BLENDS; BN-TI; DENSIFICATION; NI;
Keywords:
SHS synthesis; thermal explosion; ignition; modeling; reactive diffusion kinetics; heat transfer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Klinger, L Technion Israel Inst Technol, Dept Mat Engn, IL-32000 Haifa, Israel Technion Israel Inst Technol Haifa Israel IL-32000 fa, Israel
Citazione:
L. Klinger et al., "In situ processing of TiB2/TiC ceramic composites by thermal explosion under pressure: experimental study and modeling", MAT SCI E A, 302(1), 2001, pp. 92-99

Abstract

A model describing non-isothermal reactive diffusion in B4C-Ti powder blends leading to thermal explosion (TE/SHS) in the conditions of enhanced heattransfer into the surrounding ambience was developed. The model explicitlyincorporates the reaction kinetics and is based on previously reported experimental kinetics of isothermal growth of diffusion layers at a flat B4C/Ti interface. In spite of a number of simplifications (spherical geometry, sequential reactions of TiB and TiB, formation, etc.), a good agreement between the model calculations and experimental results on TE/SHS in B4C-3Ti dense samples placed between the preheated rams of a press has been obtained. The B4C powder particle size was found to significantly affect the ignition of TE, and the combustion process could be controlled by addition of small amounts of very fine powder fraction. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 14/07/20 alle ore 09:03:27