| Al_2O_3颗粒对LiTaO_3压电陶瓷增强增韧机制的探讨 |
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| 引用本文： | 张有凤,周玉,贾德昌,孟庆昌.Al_2O_3颗粒对LiTaO_3压电陶瓷增强增韧机制的探讨[J].热加工工艺,2009,38(22). |
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| 作者姓名： | 张有凤 周玉 贾德昌 孟庆昌 |
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| 作者单位： | 1. 上海工程技术大学材料工程学院,上海,20162;哈尔滨工业大学特种陶瓷研究所,黑龙江,哈尔滨,150001
2. 哈尔滨工业大学特种陶瓷研究所,黑龙江,哈尔滨,150001 |
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| 基金项目： | 上海市重点学科建设项目，上海市高校培养优秀青年教师科研专项基金 |
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| 摘 要： | 采用氮气保护热压烧结工艺制备Al_2O_3/LiTaO_3(简称ALT)陶瓷基复合材料,研究了Al_2O_3颗粒对LiTaO_3压电陶瓷增强增韧的机制.结果表明,ALT陶瓷复合材料的相对密度比烧结纯LiTaO_3陶瓷的高得多,且其各项力学性能均有明显的提高;Al_2O_3的加入起到烧结助剂的作用;Al_2O_3第二相加入后对LiTaO_3压电陶瓷起到弥散强化作用,其增韧机理为ALT复合材料中残余应力场和裂纹偏转增韧.
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| 关 键 词： | 增韧机理 陶瓷复合材料 |
Discussing on Effect of Al_2O_3 Particles on Reinforcing and Toughening Mechanism of LiTaO_3 Matrix Piezoelectric Ceramic Composite |
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| ZHANG Youfeng,ZHOU Yu,JIA Dechang,MENG Qingchang.Discussing on Effect of Al_2O_3 Particles on Reinforcing and Toughening Mechanism of LiTaO_3 Matrix Piezoelectric Ceramic Composite[J].Hot Working Technology,2009,38(22). |
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| Authors: | ZHANG Youfeng ZHOU Yu JIA Dechang MENG Qingchang |
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| Abstract: | Al_2O_3 _(p)/LiTaO_3 (denoted as ALT) ceramic composite was prepared by hot pressed. The effect of Al_2O_3 particles on reinforcing and toughening mechanism of LiTaO_3 matrix piezoelectric ceramic composite were investigated. The results show that the relative density and mechanical properties of ALT ceramic composite are much higher than that of pure LiTaO_3 ceramic, which indicates that the addition of Al_2O_3 acts sintering aids. The flexural strength of LiTaO_3 matrix ceramic composite is improved by dispersion strengthening of Al_2O_3 particles, and the toughness of the ALT composites increases with the addition of Al_2O_3 particles, because of the function of the residual stress field and crack deflection . |
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| Keywords: | LiTaO_3 Al_2O_3 LiTaO_3 Al_2O_3 toughening mechanism ceramic composite |
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