Effect of compaction pressure on the structure and mechanical properties of functionally graded aluminium-glass microsphere (FGAGM) foams produced by powder metallurgy process

Vicheka  MOEUN; Seksak  ASAVAVISITHCHAI

doi:10.55713/jmmm.v35i4.2432

Authors

Vicheka MOEUN Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand; Department of Industrial and Mechanical Engineering, Faculty of Electrical Engineering, Institute of Technology of Cambodia, Russian Federation Blvd, P.O. Box 86, Phnom Penh 120404, Cambodia
Seksak ASAVAVISITHCHAI Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

DOI:

https://doi.org/10.55713/jmmm.v35i4.2432

Keywords:

Functionally graded materials, Glass microsphere, Powder metallurgy, Metal-matrix composite, Mechanical property

Abstract

Functionally graded aluminium-glass microsphere (FGAGM) foams were successfully fabricated via powder metallurgy. The influence of compaction pressure on the structural and mechanical properties of the foams was systematically investigated. The study observed that increasing compaction pressure enhanced the green (pre-sintering) density of FGAGM foam, while post-sintering densities exhibited a decreasing trend with higher compaction pressures. The mechanical examination indicated that mechanical properties improved significantly with higher compaction pressures. While higher compaction pressures generally improve mechanical properties, the study identified that excessive pressures could lead to the fracture of GM particles, introducing defects that compromise the foam's structural integrity. Therefore, determining an optimal compaction pressure is crucial to maximize mechanical performance while preserving the integrity of the composite constituents.

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