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Titolo:
Wetting phenomena in the TiC/(Cu-Al) system
Autore:
Froumin, N; Frage, N; Polak, M; Dariel, MP;
Indirizzi:
Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel Ben Gurion Univ Negev Beer Sheva Israel IL-84105 4105 Beer Sheva, Israel
Titolo Testata:
ACTA MATERIALIA
fascicolo: 7, volume: 48, anno: 2000,
pagine: 1435 - 1441
SICI:
1359-6454(20000419)48:7<1435:WPITTS>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
TITANIUM CARBIDE; PHASE-DIAGRAMS; SI-ALLOYS; OXYGEN; AL; METALS; TEMPERATURE; WETTABILITY; SURFACES; ALUMINUM;
Keywords:
surfaces & interfaces; carbides; thermodynamics; oxydation; wetting;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Dariel, MP Ben Gurion Univ Negev, Dept Mat Engn, POB 653, IL-84105 Beer Sheva, Israel Ben Gurion Univ Negev POB 653 Beer Sheva Israel IL-84105 srael
Citazione:
N. Froumin et al., "Wetting phenomena in the TiC/(Cu-Al) system", ACT MATER, 48(7), 2000, pp. 1435-1441

Abstract

The wetting behavior in the TiC/(Cu-Al) system was studied by the sessile drop method over the entire Cu-Al alloy concentration range. The experimental results show that the wetting evolution in the TiC/Cu system is controlled by partial dissolution of the titanium carbide phase. The presence of oxy gen on the TiC surface strongly inhibits the interaction between the ceramic and molten Cu, thus leading to non-wetting conditions. The improved wetting of the oxygen-free TiC substrate by Cu-Al alloys is due to the enhanced transfer of titanium from the carbide phase into the melt, and results from its increased solubility in the Al-containing molten alloy. The wetting of TiC substrates covered with an oxygen-containing layer by a molten Cu-Alalloy is affected by the reduction of this layer and transfer of the released Ti into the molten metal. Enhanced wetting may also result from in situdeoxidization of the surface of the Cu-Al liquid drop and of the TiC substrate due to the evaporation of the Al2O sub-oxide at elevated temperature. A thermodynamic analysis of the systems under consideration is in good agreement with the experimental observations. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 20/09/20 alle ore 10:09:19