Mechanical Properties of ZrB2-SiC Ceramics Sintered by Hot Oscillatory Pressing
ZrB2-SiC ceramics were prepared using hot oscillatory pressing(HOP)and hot pressing(HP)processes,and the effect of oscillatory pressure on the densification and mechanical properties of ZrB2-SiC ceramics was investigated.The results have shown that compared to using the HP process to fabricate ZrB2-SiC ceramics,the densification rate of HOP process has been improved significantly,and the interface between ZrB2 and SiC is well bonded;The hardness and fracture toughness of the ZS30 sample prepared by the HOP process reached 21.1 GPa and 7.3 MPa·m1/2,respectively,which were significantly improved compared to the samples prepared by the HP process under the same sintering parameters.HOP has shown good development prospects in the preparation of high-performance ZrB2-SiC ceramics.
Ultra-high temperature ceramics(UHTCs)ZrB2SinteringDensificationMechanical properties
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