Physical models of microporosity formation during MMC fabrication

Autor:	Olivier Mantaux, Eric Lacoste, Michel Danis
Rok vydání:	2003
Předmět:	Liquid metal Materials science Fabrication Physical model Computer simulation Materials Chemistry Metals and Alloys Mechanical engineering Physical and Theoretical Chemistry Composite material Condensed Matter Physics Porosity Shrinkage
Zdroj:	Revue de Métallurgie. 100:1193-1202
ISSN:	1156-3141 0035-1563
DOI:	10.1051/metal:2003188
Popis:	The impregnation of a fibrous preform by a liquid metal is one of the techniques used to prepare metal matrix composites (MMC). The preparation by impregnation may however lead to defects like microporosity. The micropores present in MMC result from the superposition of two processes: the trapping of gas by capillarity during the infiltration phase and the formation of additional porosity related to solidification shrinkage. These two processes are analyzed in this paper and physical models are proposed for their description. It is then shown how the formation of microporosities can be simulated numerically using these models. Finally, prospects for a better numerical simulation of the preparation of MMC by impregnation are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1c2407a9b19135ac324dc49d34b2af9a https://doi.org/10.1051/metal:2003188 Zobrazit plný text záznamu