Research progress and prospect of preparation of aluminum foam composite structures
Aluminum foam is a kind of multifunctional porous metal material with a large number of holes,which has the characteristics of shock absorption,electromagnetic shielding,heat insulation,damping,noise reduction and so on.Due to its poor mechanical properties and corrosion resistance,researchers mostly use dense metal materials as panels or outer walls to improve the comprehensive properties of aluminum foam.Aluminum foam sandwich panel structure and aluminum foam filled tube structure,as two forms of aluminum foam composite structure,have significant energy absorption characteristics and structural strength.Nowadays,the rapid development and industry promotion of aluminum foam composite structure are limited due to low production efficiency,small product size,poor interface bonding strength and high preparation cost.Firstly,the preparation methods of aluminum foam composite structure were reviewed,including adhesive connection,bolt connection,welding connection and powder metallurgy connection of aluminum foam sandwich plate structure,in-situ preparation method and ex-situ preparation method of aluminum foam filled tube structure.On this basis,the mechanical properties of aluminum foam composite structure and the limitations of different preparation methods were introduced.Finally,the feasibility of the application of aluminum foam composite structure in the field of civil engineering was briefly analyzed,and it was summarized and prospected.
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