| SiC(w)-ZrO2改性MoSi2复相陶瓷的组织与性能 |
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| 引用本文： | 艾云龙,刘长虹,李玲艳,何文,陈同彩.SiC(w)-ZrO2改性MoSi2复相陶瓷的组织与性能[J].材料热处理学报,2010,31(8). |
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| 作者姓名： | 艾云龙 刘长虹 李玲艳 何文 陈同彩 |
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| 作者单位： | 南昌航空大学材料科学与工程学院,江西,南昌,330063 |
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| 基金项目： | 航空基础科学基金，江西省自然科学基金 |
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| 摘 要： | 通过热压烧结制备SiC(W)-ZrO2-MoSi2复相陶瓷,利用X射线衍射仪、图像分析仪、透射电镜对复相陶瓷试样组织结构进行了研究,探讨了SiC(W)-ZrO2协同作用对MoSi2陶瓷性能的影响.结果表明:纳米ZrO2颗粒的加入对材料的细化作用较SiC晶须明显,复相协同作用细化效果更好.SiC(W)-ZrO2协同作用的综合机制有利于提高复相陶瓷的抗弯强度和断裂韧性,ZrO2量的增加对提高复相陶瓷断裂韧性的作用更明显;ZrO2粒子钉扎位错,导致可动位错绕过,强化材料基体.弥散分布的SiC晶须阻碍位错运动,使位错缠结、交割,阻碍晶界迁移;粒子周围出现孪晶以及SiC晶须引起的层错,阻碍其晶粒长大.
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| 关 键 词： | MoSi2复相陶瓷 组织 力学性能 位错 |
Microstructure and properties of SiC(w)-ZrO2 modified MoSi2 composite ceramics |
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| AI Yun-long,LIU Chang-hong,LI Ling-yan,HE Wen,CHEN Tong-cai.Microstructure and properties of SiC(w)-ZrO2 modified MoSi2 composite ceramics[J].Transactions of Materials and Heat Treatment,2010,31(8). |
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| Authors: | AI Yun-long LIU Chang-hong LI Ling-yan HE Wen CHEN Tong-cai |
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| Affiliation: | AI Yun-long,LIU Chang-hong,LI Ling-yan,HE Wen,CHEN Tong-cai (College of Material Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China) |
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| Abstract: | SiC(W)-ZrO2-MoSi2 ceramic composites were prepared by hot-pressing sintering.Microstructure of the composites was investigated by means of X-ray diffraction (XRD),image analysis and transmission electron microscopy (TEM).The synergic effect of SiC(W)-ZrO2 on mechanical preperties of MoSi2 ceramics was discussed.The results show that the effect of ZrO2 nanoparticles on refing the matrix is more obvious than that of SiC whiskers,and the better refing effect of synergism by SiC(W) and ZrO2 nanoparticles is obs... |
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| Keywords: | SiC(w)-ZrO2 |
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