| SiCW／Y—TZP／Al2O3复合陶瓷的显微结构及其力学性能 |
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| 引用本文： | 萧莉美,刘玉先.SiCW／Y—TZP／Al2O3复合陶瓷的显微结构及其力学性能[J].物理测试,1996(2):12-15,21. |
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| 作者姓名： | 萧莉美 刘玉先 |
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| 作者单位： | 山东工业大学，山东工业大学，山东工业大学 济南 250014，济南 250014，济南 250014 |
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| 摘 要： | 研究了ＳｉＣＷ／Ｙ－ＴＺＰ／Ａｌ２Ｏ３系复合陶瓷的显微结构及其力学性能，通过透射电镜拉伸试样中的裂纹扩展形态与组织变化，分析了晶须与ＺｒＯ２相变增韧机制。结果表明，陶瓷体内各相结合致密，分布较为均匀，其室温强度和断裂韧度分别为１１００ＭＰａ和１１．９ＭＰａ．ｍ＾１／２，晶须拔出，裂纹偏转及ＺｒＯ２ｔ－ｍ相变是该复合材料的主要增韧机制。ＳｉＣ晶须和Ｙ－ＴＺＰ的共同作用，对复合材料强度和断裂韧性的提高
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| 关 键 词： | 碳化硅 晶须 复合陶瓷 增韧 相变 金属陶瓷 |
Microstructures and Mechanicl Properties of SiC_w/Y - TZP/A1_2O_3 Composite Ceramics |
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| Xiao Limci,Shandong Polytechnic University,Jinan.Microstructures and Mechanicl Properties of SiC_w/Y - TZP/A1_2O_3 Composite Ceramics[J].Physics Examination and Testing,1996(2):12-15,21. |
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| Authors: | Xiao Limci Shandong Polytechnic University Jinan |
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| Affiliation: | Xiao Limci,Shandong Polytechnic University,Jinan,250014 |
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| Abstract: | Microstructures and mechanical properties of SiCw/Y - TZP/A12O3 composites wrer studied. Through TEM observation of tensile sample, the changes of microstructure and crack propagation morphology were revealed,and the whisker reinforcing and ZrO2 transformaton toughening mechanisms were analysed. The results show that all phases are connected compactly and distributed homogeneously. The tensile strength and fracture toughness are 1100 Mpa and 11. 9Mpa. m1/2 .respectively. The main reinforcing mechanism for this composite is pull -out of SiC whisker,crack deflection and t - m transformation of ZrO2-The Presence of Y -TZP and SiC whiskers has a superposition or coordination effect on the improvement of strength and fracture toughness of the composite. |
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| Keywords: | SiC whisker Yttria-stabilized tetragonal zirconia polycrystals composite whisker toughening tm transformation |
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