The fabrication and mechanical properties of SiC/ZrB₂ laminated ceramic composite prepared by spark plasma sintering

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• 作者：Hailong Wang^a ; ^{119whl@zzu.edu.cn} ; Bingbing Fan^a ; Lun Feng^a ; Deliang Chen^a ; Hongxia Lu^a ; Hongliang Xu^a ; Chang-An Wang^b ; Rui Zhang^a ; ^c
• 关键词：C. Mechanical properties ; Laminated composites ; Zirconium diboride ; Spark plasma sintering
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：August, 2012
• 卷：38
• 期：6
• 页码：5015-5022
• 文件大小：1238 K

摘要

Laminated SiC/ZrB₂ ceramic was fabricated by roll-compaction and spark plasma sintering at 1600 掳C. A maximum fracture toughness of 12.3 卤 0.3 MPa m^1/2 was measured for the sintered SiC/ZrB₂ laminated ceramic. This significant improvement in fracture toughness can be attributed to the crack deflection along the interfacial layer and the presence of residual stresses in the sample. The effect of interlayer composition on the residual stresses was discussed in detail. It is observed that the residual thermal stress could be reduced by addition of ZrB₂ particles to the SiC interlayer. The bending strength can be increased to 388 卤 44 MPa with the addition of 20 vol%ZrB₂ to the SiC interlayer.