Behaviour of Metal Matrix Syntactic Foams in Compression

摘要

Metal matrix syntactic foams are a class of composite materials consisting of a continuous metal matrix embedded with hollow or porous ceramic particles. Because of the existence of porosity, they have good energy absorption capabilities. In comparison with metal foams and polymer matrix syntactic foams, they have higher compressive strength and therefore higher energy absorption. They are promising materials for applications in lightweight structures and energy absorbers against impact. This paper gives a short overview of the important process and material factors affecting the mechanical behaviour of metal matrix syntactic foams under compression. The properties considered include compressive strength, failure mode and energy absorption. The key factors discussed include fabrication method, strength of metal matrix, and the strength and inner structure of the ceramic particles.