Abstract: Laminated ZrB2-SiC/G graphite (ZrB2-SiC/G) ceramics were fabricated by tap-casting, stacking and hot-pressing sintering. The effect of directivity of weak graphite layer on the laminated ZrB2-SiC/G ceramics was investigated. The phase composition and morphology of the laminated ZrB2-SiC/G ceramics was analyzed and observed by XRD and SEM, respectively. The results show that the flexural strength in the parallel direction of the laminated ZrB2-SiC/G ceramics is (382±25) MPa, which is slightly lower than that of (429±30) MPa in the perpendicular direction. The fracture toughness in the parallel direction is (11.2±0.3) MPa·m1/2, which increases by 75% compared with that in the perpendicular direction. The increase of fracture toughness of the laminated ZrB2-SiC/G ceramics in the parallel direction is mainly attributed to the crack deflection, branching and delamination caused by graphite layer.
于长新,王发刚,尹凯俐,纪文义,刘新超,魏春城. 弱界面层方向性对层状ZrB2-SiC/石墨陶瓷的影响[J]. 《材料导报》期刊社, 2018, 32(12): 2047-2050.
YU Changxin, WANG Fagang, YIN Kaili, JI Wenyi, LIU Xinchao, WEI Chuncheng. Effect of the Directivity of Weak Interfacial Layer on the Laminated ZrB2-SiC/Graphite Ceramics. Materials Reports, 2018, 32(12): 2047-2050.
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2018, Vol. 32 
