Functionally-Graded Metallic Syntactic Foams Produced via Particle Pre-Compaction

Metals

Nima Movahedi¹  Thomas Fiedler¹  Steffen Broxtermann¹  Lucas York¹ 

[1] Centre for Mass and Thermal Transport in Engineering Materials, School of Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia;

关键词: metallic syntactic foam;    functionally graded;    aluminum alloy;    expanded perlite;    mechanical properties;   

DOI  :  10.3390/met10030314

来源: DOAJ

【 摘 要 】

This paper introduces a novel functionally graded metallic syntactic foam. The investigated foams are manufactured while using infiltration casting where molten A356 aluminum flows into the interstitial voids of packed expanded perlite (EP) particle beds. The partial pre-compaction of particle beds enables the creation of distinct and reproducible density gradients within the syntactic foam. In this study, the samples are produced using four gradually increasing compaction forces and are compared to non-compacted samples. X-ray imaging is used to detect the resulting spatial variation of foam density. In addition, quasi-static compression tests are performed to determine the mechanical foam properties. The results suggest that particle pre-compaction is an efficient tool for tailoring the density and mechanical properties of these novel functionally graded materials.

【 授权许可】

Unknown