Abstract
In this work, closed-cell aluminum foams with 4 wt.% contents of short-cut basalt fibers (BFs) were successful prepared by using the modified melt-foaming method. The pore size of BF-containing aluminum foam and commercially pure aluminum foam was counted. The distribution of BF and its effect on the compressive properties of closed-cell aluminum foams were investigated. The results showed that the pore size of BF-containing aluminum foams was more uniform and smaller. BF mainly existed in three different forms: Some were totally embedded in the cell walls, some protruded from the cell walls, and others penetrated through the cells. Meanwhile, under the present condition, BF-containing aluminum foams possessed higher compressive strength and energy absorption characteristics than commercially pure aluminum foams, and the reasons were discussed.
Highlights
Closed-cell aluminum foams are a class of novel structure materials with closed pores in pure aluminum or aluminum alloys [1]
Densification strains of basalt fibers (BFs)-containing nergy aluminum foams with different porosities are very similar, indicating that the densification strain of BF-containing aluminum foam is insensitive to porosity in the investigated porosity range
Closed-cell aluminum foams with 4 wt.% contents of BF were fabricated by the melt-foaming method using Ca, Mg as a thickening agent, and TiH2 as a foaming agent
Summary
Closed-cell aluminum foams are a class of novel structure materials with closed pores in pure aluminum or aluminum alloys [1]. Owing to its unique pore structure, closed-cell aluminum foam possesses ultra-low density, excellent sound-absorbing properties, vibration damping, electromagnetic shielding, and good energy absorption performance, which have made them widely used in transportation, construction, automobile fields, and so on [2,3,4]. Excellent mechanical properties are needed to meet the requirement of structural materials. Up until now, adjusting the relative density is most commonly applied to obtain higher mechanical properties, especially compression properties [5]. Alloying and aluminum matrix syntactic foams (AMSFs) were used to optimize its compression performances. Xia et al [7,8]
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