Mechanical properties and slurry erosion resistance of a hybrid composite SiC foam/SiC particles/EP

Abstract

A novel hybrid composite SiC foam/SiC particles/EP (denoted as SiC foam /SiC p /EP), consisting of E-51 epoxy resin as the matrix, SiC foam and SiC particles as the reinforcements, was prepared in this work. The slurry erosion properties of SiC foam /SiC p /EP composite and SiC foam /EP (SiC foam/epoxy resin) composite were investigated by using a rotating disc rig. It was found out that SiC foam /SiC p /EP exhibited better mechanical and anti-erosive performance as compared with SiCfoam /EP. SiC particle size had great influence on the mechanical and anti-erosive properties of the hybrid composites. Smaller SiC particles were beneficial to improve the mechanical strength, but inclined to decrease the anti-erosive performance of the composite. In general, the hybrid composite SiC foam /SiC p /EP can be applied potentially with the excellent antierosive performance under the solid particle erosion conditions.

Preparation and properties of expandable epoxy foam prepreg for sandwich composites prepared via thermal expansion molding process

“…Relative to compression and impact tests, the tensile test is more effective in comprehensively evaluating the mechanical properties and failure modes of foam 25,26 . Fiber‐reinforced foam structures have attracted extensive attention because of their marked effects in improving mechanical properties of isotropic foam materials 27,28 . However, complexity of the failure modes necessitates further assessment of the evaluation method and failure mechanism of mixed structure foam 29,30 .…”

“…25,26 Fiber-reinforced foam structures have attracted extensive attention because of their marked effects in improving mechanical properties of isotropic foam materials. 27,28 However, complexity of the failure modes necessitates further assessment of the evaluation method and failure mechanism of mixed structure foam. 29,30 For instance, the properties of short fiber reinforced epoxy foam are affected by changing bubbles structure.…”