真空热处理对碳化钒粉末制备的影响Influence of vacuum heat-treatment on properties of vanadium carbide powder
姜中涛,刘颖,李力,陈巧旺,涂铭旌
摘要(Abstract)：
为了制备高纯的碳化钒粉末,对五氧化二钒为原料小批量制备所得碳化钒产物进行了真空热处理。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、LECO碳氧分析仪等测试手段对热处理产物进行了表征,重点研究了热处理温度对碳化钒粉末的影响,并用X射线光电子能谱仪(XPS)测试探讨了热处理对碳化钒纯化的机理。结果表明:在1100℃的热处理温度下,可得到有序的V8C7相,游离碳和氧含量分别为0.18%、0.31%;热处理的过程使得碳化钒中的游离碳和氧的下降是粉末中游离碳和剩余的少量钒氧化物发生了进一步的还原反应和粉末中吸附水的消失造成的。
关键词(KeyWords)： 碳化钒;真空热处理;XPS;纯化
基金项目(Foundation): 重庆市自然科学基金计划重点项目(2010YZ0009);; 重庆文理学院校内科研项目(Y2010XC49);; 重庆市高校新材料开发及应用研究创新团队(201042)
作者(Author): 姜中涛,刘颖,李力,陈巧旺,涂铭旌
DOI: 10.13289/j.issn.1009-6264.2012.03.008
参考文献(References)：
- [1]有色金属提取冶金手册编辑委员会.有色金属提取冶金手册[M].北京:冶金工业出版社,1999.
- [2]Reichl W,Hayek K.The vanadium subsurface alloy on polycrystalline rhodium:formation and catalytic properties[J].Journal of Catalysis,2004,222(1):53-64.
- [3]Yazawa Y,Furuhara T,Maki T.Effect of matrix recrystallization on morphology,crystallography and coarsening behavior of vanadium carbide inaustenite[J].Acta Materialia,2004,52(12):3727-3736.
- [4]Wiesenberger H,Lengauer W,Ettmayer P.Reactive diffusion and phase equilibria in the V-C,Nb-C,Ta-C and Ta-N systems[J].Acta Materialia,1998,46(2):651-666.
- [5]Choi K,Hwang N M,Kim D Y.Effect of VC addition on microst ructural evolution of WC-Co alloy:mechanism of grain growth inhibition[J].PowderMetalluray,2000,43(2):168-172.
- [6]Yamamoto T,Ikuhara Y,Sakuma T.High resolution transmission electron microscopy study in VC-doped WC-Co compound[J].Science andTechnology of Advanced Materials,2000,1(2):97-104.
- [7]李海艳,刘宁.VC对WC-6.5%Co硬质合金组织和性能的影响[J].硬质合金,2009,26(4):206-211.LI Hai-yan,LIU Ning.Effect of VC on the microstructure and properties of WC-6.5%Co cemented carbide[J].Cemented Carbide,2009,26(4):206-211.
- [8]陈厚生.碳化钒与氮化钒[J].钢铁钒钛,2000,21(1):68-72.CHEN Hou-sheng.Vanadium carbide and vanadium nitride[J].Iron Steel Vanadium Titanium.2000,21(1):70.
- [9]蔡靖涵,黄婉霞,何鹏,等.碳热还原法制备VO2/云母复合粉体研究[J].功能材料,2011,42(S1):82-84.CAI Jing-han,HUANG Wan-xia,HE Peng,et al.Preparation of VO2/Mica composite powder by carbothermal method[J].Journal of FounctionalMaterials,2011,42(S1):82-84.
- [10]Emmons G H,Williams W S.Thermodynamics of order-disorder transformations in vanadium carbide[J].Journal of Materials Science,1983,18:2589.
- [11]Jeong-Gil Choi.The surface properties of vanadium compounds by X-ray photoelectron spectroscopy[J].Applied Surface Science,1999,148:64-72.
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