| SiC_w/莫来石和SiC_w/Y-TZP/莫来石复合材料的力学性能与显微结构 |
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| 引用本文： | 洪金生,黄校先,郭景坤,李包顺. SiC_w/莫来石和SiC_w/Y-TZP/莫来石复合材料的力学性能与显微结构[J]. 硅酸盐学报, 1992, 0(5) |
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| 作者姓名： | 洪金生 黄校先 郭景坤 李包顺 |
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| 作者单位： | 中国科学院上海硅酸盐研究所(洪金生，黄校先，郭景坤)，中国科学院上海硅酸盐研究所(李包顺) |
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| 摘 要： | 以莫来石为基体,SiC晶须(SiC_w)和Y-TZP(Y_2O_3稳定的四方ZrO_2多晶)为两种补强剂,采用热压烧结工艺,制备SIC_w/莫来石和SIC_w/Y-TZP/英来石复合材料。研究了复合材料的力学性能与显微结构,并对强化增韧机制进行了分析。结果表明,SiC晶须补强莫来石,可以改善其强度和断裂韧性。若SiC晶须和Y-TZP共同补强英来石,则可以进一步提高其强度和断裂韧性。晶须引起裂纹偏转,晶须拔出以及由ZrO_2相变引起的微裂纹增韧是该复合材料的主要增韧机制。SiC晶须和Y-TZP两种补强剂的共同作用,对莫来石强度和断裂韧性的提高具有叠加或协同效应。
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| 关 键 词： | 莫来石 碳化硅晶须 钇稳定的四方氧化锆多晶体 复合材料 强化增韧机制 |
MECHANIcAL PROPERTIES AND MICROSTRCTURE OF SiC_w/MULLITE AND SiC_w/Y-TZP/MULLITE COMPOSITES |
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| Hong Jinsheng Huang Xiaoxian Guo Jingkun Li Baoahun. MECHANIcAL PROPERTIES AND MICROSTRCTURE OF SiC_w/MULLITE AND SiC_w/Y-TZP/MULLITE COMPOSITES[J]. Journal of The Chinese Ceramic Society, 1992, 0(5) |
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| Authors: | Hong Jinsheng Huang Xiaoxian Guo Jingkun Li Baoahun |
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| Abstract: | SiC whisker (SiC_w)/mullite and SiC_w/Y-TZP (yttria stabilized tetragonal zirconia)/mullite composites were fabricated by hot-pressing with SiC whiskers and Y-TZP as reinforcing phases. The mechanical properties and microstructure as well as reinforcing mechanisms were investigated. Flexural strength and fracture toughness of mullite are improved by the addition of SiC whiskers. Significant improvement in flexural strength and fracture toughness will be obtained for the SiC_w/Y-TZP/mullite composite, in comparison with the SiC_w/mullite composite. Reinforcing mechanism in the composite is mainly crack deflection induced by SiC whiskers, pullout of SiC whiskers, and microcrack toughening caused by Y-TZP. Interaction of Y-TZP and SiC whiskers has a superposition or coordination effect on the improvement of strength and fracture toughness of mullite. |
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| Keywords: | mullite silicon carbide whisker yttria-stabilized tetragonal zirconia polycrystals composite reinforcing mechanism |
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