| 二硼化钛陶瓷在不同温度下的氧化行为 |
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| 引用本文： | 黄飞,傅正义,王为民,王皓,王玉成,张金咏,张清杰.二硼化钛陶瓷在不同温度下的氧化行为[J].硅酸盐学报,2008,36(5):584-587. |
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| 作者姓名： | 黄飞 傅正义 王为民 王皓 王玉成 张金咏 张清杰 |
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| 作者单位： | 武汉理工大学,复合材料新技术国家重点实验室,武汉,430070 |
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| 基金项目： | 教育部重大培育和创新团队基金
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湖北省创新研究群体科学基金 |
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| 摘 要： | 采用静态氧化法对不同温度下TiB2陶瓷的氧化行为进行研究,利用X射线衍射仪、扫描电镜、X射线光电子能谱仪对氧化前后的样品进行表征.结果表明:低温下TiB2陶瓷氧化动力学满足抛物线规律,并在表面形成液相B203,阻止氧化反应的进一步进行,冷却后B2O3以玻璃态覆盖在表面.高温下TiB2氧化反应在4h前满足抛物线规律,表面形成一层TiO2多孔结构;氧化4h后,随着氧扩散距离的延长,扩散阻力加大,从而使氧化速率降低,氧化反应不再满足抛物线规律.
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| 关 键 词： | 二硼化钛 氧化动力学 微观结构 titanium diboride oxidation kinetics microstructure |
| 文章编号： | 0454-5648(2008)05-0584-04 |
| 修稿时间： | 2007年9月23日 |
OXIDATION BEHAVIOR OF TITANIUM DIBORIDE CERAMIC AT DIFFERENT TEMPERATURES |
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| HUANG Fei,FU Zhengyi,WANG Weimin,WANG Hao,WANG Yucheng,ZHANG Jinyong,ZHANG Qinjie.OXIDATION BEHAVIOR OF TITANIUM DIBORIDE CERAMIC AT DIFFERENT TEMPERATURES[J].Journal of The Chinese Ceramic Society,2008,36(5):584-587. |
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| Authors: | HUANG Fei FU Zhengyi WANG Weimin WANG Hao WANG Yucheng ZHANG Jinyong ZHANG Qinjie |
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| Abstract: | The oxidation behavior of TiB2 ceramics at different temperatures was investigated using the static oxidation kineticmethod. The samples before and after oxidation have been characterized by X-ray diffractometer, scanning electron microscope andX-ray photoelectron spectrometer. The results show that the oxidation kinetics appear the parabolic law at low temperature. A liquidB2O3 coating on the surface of TiB2 ceramic could prevent from further oxidation. After the ceramic samples were cooled, their sur-faces were covered with glassy B2O3. At high temperature, the oxidation reaction of TiB2 ceramics showed the parabolic law onlybefore 4 h. Porous rutile TiO2 formed on the surface. But the oxidation behavior with the parabolic law for the TiB2 ceramics was notobserved after oxidation for 4 h because of the long path of diffusion, strong diffusion resistance and low reaction rate. |
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| Keywords: | titanium diboride oxidation kinetics microstructure |
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