| TiC/Fe体系自蔓延高温合成过程中金属相Fe的作用 |
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| 引用本文： | 邹正光,付正义,袁润章.TiC/Fe体系自蔓延高温合成过程中金属相Fe的作用[J].材料科学与工程学报,1998(3). |
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| 作者姓名： | 邹正光 付正义 袁润章 |
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| 作者单位： | 武汉工业大学材料复合新技术国家重点实验室 |
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| 摘 要： | 本文探讨了金属相Ｆｅ的含量变化对ＴｉＣ／Ｆｅ体系自蔓延高温合成的影响。随着Ｆｅ含量的增高，燃烧温度降低，在Ｆｅ为３０～３５ｗｔ％时出现一个温度平台，对应着Ｆｅ的熔融。燃烧波速度在Ｆｅ为１０ｗｔ％时出现极大值，反映ＳＨＳ过程中Ｆｅ液相的作用。Ｆｅ含量增高，体系的燃烧模式由稳态燃烧转变为振荡式和螺旋式燃烧，当Ｆｅ＞６０ｗｔ％时，体系燃烧反应则不能自持。合成产物中ＴｉＣ粒度随着Ｆｅ含量增高而变细，反映了燃烧温度和铁液相对ＴｉＣ粒子生长的联合作用。
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| 关 键 词： | 自蔓延高温合成（SHS） TiC／Fe体系 过程参数、结构 |
The Effect of Metal Fe on Self Propagating High Temperature Synthesis of TiC/Fe System |
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| Zou Zhengguang Fu Zhengyi Yuan Runzhang Wuhan University of Technology,National Laboratory of Advanced Technolorgy for Materials Compositing,Wuhan.The Effect of Metal Fe on Self Propagating High Temperature Synthesis of TiC/Fe System[J].Journal of Materials Science and Engineering,1998(3). |
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| Authors: | Zou Zhengguang Fu Zhengyi Yuan Runzhang Wuhan University of Technology National Laboratory of Advanced Technolorgy for Materials Compositing Wuhan |
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| Affiliation: | Zou Zhengguang Fu Zhengyi Yuan Runzhang Wuhan University of Technology,National Laboratory of Advanced Technolorgy for Materials Compositing,Wuhan 430070 |
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| Abstract: | The effect of the content of metal Fe on the Self propagation High temperature Synthesis of TiC/Fe system is studied, With Fe content increasing, combustion temperature decreases. And between 30-35wt% Fe there is a temperature plateau which corresponds to melting point of Fe. The velocity of combustion wave is highest at 10wt% Fe, which reflect the effect of liquid Fe in SHS Processes. The combustion model becomes unsteady combustion from steady combustion when the Fe content is increased. For Fe>60wt% combustion reaction can not sustain. The TiC particles in synthesized product become smaller with increasing the Fe content. It is hopeful to synthesize composites with nano metre ceramic phase by SHS. |
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| Keywords: | SHS TiC/Fe system Process parameter Structure |
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