Selectively Reinforced Aluminum Metallic Hybrid Composites by Liquid Metal Squeeze Infiltration Process

Liquid metal infiltration, or liquid method infusion, consists of impregnating porous media composed of woven, ceramic particles, or fibers with a molten metal matrix, which fills the pores and occupies the void space within. Understanding the infiltration process is crucial to optimize the properties of the recently formed material and avoid or minimize the formation of fabrication defects. Given the fact that the flow of molten metal differs from organic flows, since molten metal possess a higher interface energy than organic flows, and modifies the wetting dynamics of the molten metal over surfaces, creating a flow driven by capillary and viscous forces. In addition, flow through porous media presents an extraordinary challenge to simulate efficiently, due to the presence of multiple scales far apart participating in the governing dynamics. For this reason, an in-house pore network simulator (EXPNS) was used. EXPNS was designed on a next generation computing framework using Sandia National Lab’s Trilinos and Kokkos library to perform high-resolution computing to generate data for the infiltration model and improve the general understanding of this process.

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Fabrication of Porous Al2O3-(m-ZrO2) Composites and Al2O3-(m-ZrO2)/PMMA Hybrid Composites by Infiltration Process

Journal of the Korean Ceramic Society ◽

10.4191/kcers.2007.44.6.291 ◽

2007 ◽

Vol 44 (6) ◽

pp. 291-296 ◽

Cited By ~ 2

Author(s):

Byong-Taek Lee ◽

Do Van Quang ◽

Ho-Yeon Song

Keyword(s):

Hybrid Composites ◽

Infiltration Process

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Fabrication of Porous β-SiAlON Preforms from Kaolin for Liquid Metal Infiltration

Materials Science Forum ◽

10.4028/www.scientific.net/msf.554.85 ◽

2007 ◽

Vol 554 ◽

pp. 85-89 ◽

Cited By ~ 1

Author(s):

Adem Demir ◽

F. Caliskan

Keyword(s):

Liquid Metal ◽

Carbothermal Reduction ◽

Xrd Analysis ◽

Processing Parameters ◽

Infiltration Process ◽

Sem Image ◽

Sialon Ceramic ◽

N2 Atmosphere ◽

Liquid Metal Infiltration ◽

Metal Infiltration

In this study, the production of β-Si6-zAlzOzN8-z (z =3) powders by the carbothermal reduction and nitridation of kaolin (Al2O3.2SiO2.2H2O) of Turkish origin (Can-Canakkale) was carried out with different processing parameters. It was found that the morphology of the produced SiAlON powder was mixture of irregular and whisker like grains. Therefore this morphology is suitable for liquid metal infiltration since the powders are already high porous. The kaolin powder containing stoichiometric rate carbon black and 30 % charcoal were pressed and reacted under nitrogen flow (2 lt/min) between 1400-1475°C for 4 h. After a carbothermal reduction and nitridation (CRN) process, porous β- SiAlON ceramic was produced from natural kaolin. Residual carbon and charcoal in the produced ß-SiAlON ceramic were fired at 1000°C giving extra porosity. The porous ß-SiAlON ceramics were sintered under N2 atmosphere at 1550°C for 2 h to make preform for infiltration process. SEM image analyses were carried out to determine preform and pore morphology and XRD analysis were performed for phase transformation.

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