TiN/Al_2O_3 Composite Material Synthesized by Aluminothermic Reduction Process in Coke Bed |
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| Authors: | NIE Jianhua LI Yawei YAN Hao LIANG Yonghe GAN Mingliang The Hubei Province Key Laboratory of Refractories Ceramics Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory Wuhan University of Science Technology Wuhan China |
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| Affiliation: | The Hubei Province Key Laboratory of Refractories and CeramicsMinistry-Province Jointly-Constructed Cultivation Base for State Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | TiN/Al2O3 composite material was prepared by aluminothermic reduction of Ti02 in coke bed.The phase composition,lattice parameter and microstructure of products treated at 1 300 ℃,1 400 ℃ ,1 500 ℃ for 3 h respectively were analyzed by XRD,SEM and TEM.The results showed that TiN/Al2O3 composite material can be prepared in coke bed via aluminothcrmic reduction method.However,the treatment temperatures affect the evolution of aluminothermic reaction and morphology of the materials obviously.The content,grain size and lattice parameter of TiN in materials in coke bed increased with the increase of treatment temperature.Thermodynamic calculation confirmed that metal A1 reacted with O2 in coke bed while it was involved in aluminothermic reduction reaction,causing the lack of Al and surplus rutile in the products. |
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| Keywords: | Aluminothermic reduction Titanium nitride/Alumina composite material Microstructure |
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