ZrBb>2b>-SiC laminated ceramic composites

详细信息	查看全文 | 推荐本文 |

• 作者：Zhihui L&#252 ; ^a ; ^b ; Dongliang Jiang^a ; ^{dljiang@sunm.shcnc.ac.cn} ; Jingxian Zhang^a ; Qingling Lin^a ; Zhengren Huang^a
• 关键词：ZrB2&ndash ; SiC ; Mechanical properties ; Laminated ceramic composites
• 刊名：Journal of the European Ceramic Society
• 出版年：2012
• 期刊代码：53_09552219
• 类别：ms
• 出版时间：June, 2012
• 卷：32
• 期：7
• 页码：1435-1439
• 文件大小：705 K

摘要

The oxidation behavior for ZrBb>2b>-20 vol%SiC (ZS20) and ZrBb>2b>-30 vol%SiC (ZS30) ceramics at 1500 掳C was evaluated by weight gain measurements and cross-sectional microstructure analysis. Based on the oxidation results, laminated ZrBb>2b>-30 vol%SiC (ZS30)/ZrBb>2b>-25 vol%SiC (ZS25)/ZrBb>2b>-30 vol%SiC (ZS30) symmetric structure with ZS30 as the outer layer were prepared. The influence of thermal residual stress and the layer thickness ratio of outer and inner layer on the mechanical properties of ZS30/ZS25/ZS30 composites were studied. It was found that higher surface compressive stress resulted in higher flexural strength. The fracture toughness of ZS30/ZS25/ZS30 laminates was found to reach to 10.73 MPa m^1/2 at the layer thickness ratio of 0.5, which was almost 2 times that of ZS30 monolithic ceramics.