| TiC-MoSi_2复合材料的原位合成及其低温氧化特性 |
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| 引用本文： | 颜建辉,王金林,唐思文.TiC-MoSi_2复合材料的原位合成及其低温氧化特性[J].材料热处理学报,2011,32(1). |
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| 作者姓名： | 颜建辉 王金林 唐思文 |
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| 作者单位： | 湖南科技大学新材料制备及应用技术研究所,湖南,湘潭,411201 |
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| 基金项目： | 国家自然科学基金，湖南教育厅资助项目 |
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| 摘 要： | 为了改善MoSi2力学性能和低温抗氧化性能,选用TiC颗粒来增强补韧MoSi2,通过XRD和SEM表征合成MoSi2基复合材料的微观结构并研究了预氧化对MoSi2基复合材料低温抗氧化性能的影响.结果表明,采用Mo、Si、Ti、C粉末可以自蔓延原位合成20 v01%TiC-MoSi2复合材料.复合材料在500℃氧化240 h增重1.261 mg·cm-2,氧化动力学呈线性关系,生成疏松多孔的氧化层导致"粉化"现象发生.经1200℃预氧化处理,20 v01%TiC-MoSi2复合材料在500℃氧化240 h增重4.83×10-mg·cm-2.预氧化处理后的材料表面形成致密的TiO2和SiO2复合膜抑制了TiC-MoSi2材料出现低温"粉化"现象.
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| 关 键 词： | 原位合成 TiC-MoSi2复合材料 预氧化 低温氧化性能 |
In-suit synthesis and low temperature oxidation properties of TiC-MoSi_2 composites |
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| YAN Jian-hui,WANG Jin-lin,TANG Si-wen.In-suit synthesis and low temperature oxidation properties of TiC-MoSi_2 composites[J].Transactions of Materials and Heat Treatment,2011,32(1). |
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| Authors: | YAN Jian-hui WANG Jin-lin TANG Si-wen |
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| Affiliation: | YAN Jian-hui,WANG Jin-lin,TANG Si-wen(Advanced Materials Synthesis and Application Technology Laboratory,Hunan University of Science and Technology,XiangTan 411201,China) |
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| Abstract: | In order to improve mechanical properties and low temperature oxidation resistance of MoSi2,TiC particle was employed to in situ prepare TiC-Mosi2 composites.The microstructure of TiC-MoSi2 composites was investigated by means of XRD,SEM and oxidation tests.The influence of pre-oxidation at high temperature on the oxidation behavior of 20 vol% TiC-MoSi2 composites at lower temperature was examined.The results indicate that the 20 vol% TiC-MoSi2 composites are synthesized with Mo,Si,Ti and C powders by self-... |
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| Keywords: | in-suit synthesis TiC-MoSi2 composites pre-oxidation oxidation property |
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