Defects in ZrO2-Reinforced Aluminum Foam Prepared by Infiltration Process

Fang Wang; Jian Guo Wu; Lu Cai Wang

doi:10.4028/www.scientific.net/AMR.250-253.561

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 250-253Defects in ZrO2-Reinforced Aluminum Foam Prepared...

Defects in ZrO₂-Reinforced Aluminum Foam Prepared by Infiltration Process

Abstract:

The aluminium foam is reinforced by compositing ZrO₂ ceramic balls with high hardness. The production process includes preparing precursor using NaCl particles and ZrO₂ ceramic balls, infiltrating molten aluminium into precursor and cleaning NaCl particles. The defects presented during the process make the structure inhomogeneous and influence the performance of aluminium foam composite. The defects consist of inner and surface shrinkage caused by insufficient infiltration and inhomogeneous distribution of ZrO₂ ceramic balls in the composite. By analyzing the forming mechanism, offering right control of process and choosing correct parameters, the sound aluminium foam composite was prepared. The optimum value of pouring temperature, preheating temperature of die and particles and the suction was determined as 740°C-760°C, 480°C-500°C and -0.04Mpa, respectively. The composite has the structure with 0.8-1.2mm pore size, 60-70% porosity and ZrO₂ ceramic balls of 40 percent by volume. The research makes a basis for the application of the new aluminium foam composite.

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Periodical:

Advanced Materials Research (Volumes 250-253)

Pages:

561-564

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.250-253.561

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Online since:

May 2011

Authors:

Fang Wang, Jian Guo Wu, Lu Cai Wang

Keywords:

Aluminium Foam Composite, Defect, Infiltration Process, Parameter, ZrO₂ Ceramic Ball

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