Infiltration of fibrous preforms by a pure metal: Part V. Influence of preform compressibility

Michaud, Véronique; Mortensen, Alicja; Sommer, Jared L.

doi:10.1007/s11661-999-0337-9

Cited by 30 publications

(21 citation statements)

References 57 publications

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“…Here we turn our attention to porous materials which deform when liquid passes through them, e.g., spongelike materials. Deformable porous materials arise in various fields, including geophysics, 7 soil science, [8][9][10] infiltration, [11][12][13][14][15] snow physics, 16 paper and printing, 17,18 and medical science. [19][20][21][22][23][24][25][26][27] In such cases, the flow through the deformable porous media deforms the material due to the forces associated with flow.…”

Section: Introductionmentioning

confidence: 99%

Capillary rise of a liquid into a deformable porous material

2009

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We examine the effects of capillarity and gravity in a model of one-dimensional imbibition of an incompressible liquid into a deformable porous material. We focus primarily on a capillary rise problem but also discuss a capillary/gravitational drainage configuration in which capillary and gravity forces act in the same direction. Models in both cases can be formulated as nonlinear free-boundary problems. In the capillary rise problem, we identify time-dependent solutions numerically and compare them in the long time limit to analytically obtain equilibrium or steady state solutions. A basic feature of the capillary rise model is that, after an early time regime governed by zero gravity dynamics, the liquid rises to a finite, equilibrium height and the porous material deforms into an equilibrium configuration. We explore the details of these solutions and their dependence on system parameters such as the capillary pressure and the solid to liquid density ratio. We quantify both net, or global, deformation of the material and local deformation that may occur even in the case of zero net deformation. In the model for the draining problem, we identify numerical solutions that quantify the effects of gravity, capillarity, and solid to liquid density ratio on the time required for a finite volume of fluid to drain into the deformable porous material. In the Appendix, experiments on capillary rise of water into a deformable sponge are described and the measured capillary rise height and sponge deformation are compared with the theoretical predictions. For early times, the experimental data and theoretical predictions for these interface dynamics are in general agreement. On the other hand, the long time equilibrium predicted theoretically is not observed in our experimental data.

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Section: Introductionmentioning

confidence: 99%

Capillary rise of a liquid into a deformable porous material

2009

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“…It unidirectional infiltration under constant applied pressure, was shown, however, that when the applied pressure is low, including nonisothermal infiltration by a pure metal or by this assumption breaks down, as metal penetrates the preform a binary alloy; [13,18] for nonisothermal infiltration by a pure in a gradual manner, filling the largest pores first. [15,28] This metal, taking into account the influence of preform deformcase is relevant to industrial practice, because it is desirable ability; [19,20] and for isothermal infiltration, taking into to maintain the applied pressure as low as possible, to minimize preform damage and to reduce costs. Moreover, in practical cases, the applied pressure is not established [29,30,31] and numerical solutions are available for a great range of problems.…”

Section: Introductionmentioning

confidence: 99%

Simulation of metal-matrix composite isothermal infiltration processing

Dopler¹,

Modaressi

Michaud

2000

Metall Mater Trans B

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In pressure infiltration processing of metal-matrix composites, molten metal is injected under external pressure into a porous preform of the reinforcing phase and solidified, either during infiltration or after the mold is filled. If infiltration is isothermal, the physics of the process are similar to drainage phenomena encountered in soil mechanics. Using this similarity, a finite-element software is developed to simulate metal-matrix composite infiltration by adaptation of a code originally developed for soil mechanics. Solutions are given for isothermal infiltration of porous preforms by a molten metal under any increasing function of the applied pressure vs time, taking into account capillary phenomena. Experimental validation is performed using SAFFIL alumina fiber preforms infiltrated with an aluminum matrix in a series of isothermal infiltration experiments in unidirectional and axisymmetric configurations. Numerical and experimental data show good agreement, both in terms of infiltration kinetics and porosity distribution. The simulation tool can, thus, be applied for isothermal infiltration of complex geometries and boundary conditions and aid mold design and process parameter optimization.

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“…These phenomena have already been studied extensively from both theoretical and experimental viewpoints. Analytical and numerical solutions have been given and compared to experimental data, for unidirectional infiltration under constant applied pressure, including non-isothermal infiltration by a pure metal Masur et al, 1989) or by a binary alloy (Mortensen and Michaud, 1990;Michaud and Mortensen, 1992); for non-isothermal infiltration by a pure metal, taking into account the influence of preform deformability (Sommer and Mortensen, 1996;Michaud et al, 1999); and for isothermal infiltration, taking into account * Tel. : +886 7 6077028; fax: +886 7 6077112.…”

Section: Introductionmentioning

confidence: 99%

Simulation of molten metal through a unidirectional fibrous preform during MMC processing

Chang

2009

Journal of Materials Processing Technology

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Infiltration of fibrous preforms by a pure metal: Part V. Influence of preform compressibility

Cited by 30 publications

References 57 publications

Capillary rise of a liquid into a deformable porous material

Capillary rise of a liquid into a deformable porous material

Simulation of metal-matrix composite isothermal infiltration processing

Simulation of molten metal through a unidirectional fibrous preform during MMC processing

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