Densification and mechanical properties of WC particulate reinforced Cr3C2 matrix composites
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The mechanical properties of Cr3C2 can be improved by adding 14–25 vol % of WC particulates through a hot-pressing process. The Cr3C2-20 vol % WC composite exhibits a fracture strength and fracture toughness of 883 MPa and 6.8 MPa m1/2, respectively, which is a better than 60% increase over the monolithic Cr3C2(σf = 526 MPa, KIC = 4.1 MPa m1/2). The possible strengthening and toughening mechanisms are disscussed in terms of microstructures, fracture modes (intergranular or transgranular) and micromechanics. The microstructural evolution and fractography which were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) will be discussed.
KeywordsPolymer Microstructure Microscopy Electron Microscopy Scanning Electron Microscopy
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