Numerical simulation of the infiltration of fibrous preforms by a pure metal

Lacoste, Éric; Aboulfatah, M.; Danis, Michel; Girot, F.

doi:10.1007/bf02666272

Cited by 3 publications

(11 citation statements)

References 8 publications

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“…(20) is presented in Figure 6 [2]. In this figure the presence of two distinct zones can be noticed in the part of the fibrous preform completely saturated with metal: 1.…”

Section: Numerical Results Of the Monodimensional Testmentioning

confidence: 89%

“…During the impregnation, the porosity of the medium varies according to the evolution of the volume fraction of the solidified metal, involving a variation of the permeability of the porous medium. For our model, a law of variation of permeability according to the porosity deduced from work found in the literature is chosen (Appendix 1) [2][3][4][5][6]. In this model, the distribution of fibers is supposed to be random and moreover it is considered that K x ¼ K y , Ox and Oy being the principal directions.…”

Section: Equations and Physical Parametersmentioning

confidence: 99%

“…The metal front displacement 3. The thermal transfer and the phase-change phenomena The first numerical model was developed to simulate the injection of a pure metal through a fibrous preform placed between two mold walls [2]. This model did not take into account the evolution of the metal front geometry on account of two strong hypotheses: the metal front was supposed to remain plane throughout filling, and the metal was injected continuously through the entire left face ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of the Liquid Flow Into a Porous Medium With Phase Change: Application to Metal Matrix Composites Processing

Borrello¹,

Lacoste²

2003

Numerical Heat Transfer, Part A: Applications

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A method of metal matrix composites processing consists of injecting a liquid metal through a fibrous preform. The metal flow through the porous preform is associated with phasechange phenomena which imply modifications of the porous medium permeability and disturb the metal flow. A finite-volume model was developed to simulate the injection of a pure metal through a fibrous preform placed between two plane walls of a metal mold. This model is based on the simultaneous resolutions of the heat equation, Darcy's law, and an advection equation to follow the evolution of the metal front geometry during the infiltration.

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“…(20) is presented in Figure 6 [2]. In this figure the presence of two distinct zones can be noticed in the part of the fibrous preform completely saturated with metal: 1.…”

Section: Numerical Results Of the Monodimensional Testmentioning

confidence: 89%

Section: Equations and Physical Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of the Liquid Flow Into a Porous Medium With Phase Change: Application to Metal Matrix Composites Processing

Borrello¹,

Lacoste²

2003

Numerical Heat Transfer, Part A: Applications

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“…Later, Calhoun and Mortensen [7] analyzed the morphological stability of the remelting front of a simplified infiltration system (steadystate, unidirectional, adiabatic infiltration with a pure metal) using linear stability analysis. Lacoste et al [8] presented a model for the infiltration of aluminum into a SAFFIL* pre-*SAFFIL is a nominally 3-m-diameter ␦-Al 2 O 3 fiber that is chopped and pressed into disk-shaped preforms. SAFFIL is a trademark of ICI Americas, Inc., Wilmington, DE.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11] However, given the complexity of the interacting phenomena in this process, several assumptions have been made in most studies involving numerical modeling, or attention has been given only to some specific issues. In this study, a more detailed description and analysis of the existing physical phenomena occurring during pressure infiltration casting are presented.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of unidirectional pressure infiltration of porous preforms by pure metals

Biswas¹,

Gatica

Tewari

1998

Metall Mater Trans A

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Metal matrix composite processing: numerical study of heat transfer between fibers and metal

Cantarel¹,

Lacoste²,

Danis³

et al. 2005

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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PurposeTo study heat transfer kinetics at the fiber scale in order to describe injection of liquid metal through a fibrous perform initially situated in a preheated mould, which is one of the various methods used in order to produce metal matrix composite materials (MMCs).Design/methodology/approachThe first part presents a preliminary study in a static case to describe heat transfer kinetics between a fiber and the matrix in the case of a sudden contact of both components initially set up at different temperatures. This model enables to study the influence of the various parameters of the problem on heat transfer kinetics with phase change. In the second part, we present a modeling which takes into account the metal convection within the pores of the preform.FindingsThe numerical results of these two models justify the instantaneous thermal equilibrium assumption classically admitted to describe MMCs manufacturing methods. The results of this dynamic microscopic model are compared with the results issued from a single temperature macroscopic model to justify the methodological approach and the choice of the microscopic domain geometry representative of the MMCs manufacturing process.Research limitations/implicationsThis first numerical model at the microscopic scale deals with the study of heat transfer between fibers and a pure metal. Next step will be the extension of this study to the preform infiltration by a metal alloy. Injection of matrix alloy implies the appearance of phenomena generated by segregation during phase changes.Originality/valueThe results of simulation tests, making use of the usual conditions of MMCs processing, show pretty good agreement with those of macroscopic models describing the anisothermal flow of a pure metal through a porous medium. From this coherence and from the results of the microscopic models as well, the hypothesis of instantaneous thermal equilibrium between fibers and metal (widely used in the literature to study the production of MMCs by infiltration of the liquid metal through the fibrous reinforcement) is justified. Moreover, it will be possible to extend it to the study of infiltration by an alloy, taking then into account thermal and solutal coupled transfers inside the study domain defined in the present work.

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Numerical simulation of the infiltration of fibrous preforms by a pure metal

Cited by 3 publications

References 8 publications

Numerical Simulation of the Liquid Flow Into a Porous Medium With Phase Change: Application to Metal Matrix Composites Processing

Numerical Simulation of the Liquid Flow Into a Porous Medium With Phase Change: Application to Metal Matrix Composites Processing

Dynamic analysis of unidirectional pressure infiltration of porous preforms by pure metals

Metal matrix composite processing: numerical study of heat transfer between fibers and metal

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