| 摘要: |
| 利用热力学原理推导出反应焓和反应吉布斯（Gibbs）自由能与温度的关系式.根据Ti-Si-C系相图，对用钨极氩弧（TIG）热在钛合金表面熔敷形成涂层过程中可能的12个化学反应进行热力学分析.热力学计算得出，Ti元素能与SiC，Si及C元素反应生成TiC，Ti3SiC2相和Ti5Si3，TiSi2金属间化合物.理论分析结果表明，在TIG熔敷条件下，通过改变不同的原材料初始组成，可以采用热力学分析方法预测熔覆层的物相组成.试验结果表明，预测结果与试验结果符合得很好. |
| 关键词: 钨极氩弧熔敷 陶瓷熔覆层 物相 热力学预测 |
| DOI：10.12073/j.hjxb.20170524 |
| 分类号: |
| 基金项目:湖北省教育厅青年基金资助项目（010403） |
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| Thermodynamic prediction for phases of ceramic coatings in Ti-Si-C system by argon arc depositing |
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YAN Wenqing1, ZHANG Jianqiang2, LIU Sheng1
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1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2.School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
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| Abstract: |
| Based on the thermodynamic principle, the relation between reaction enthalpy, Gibbs energy and temperature were deduced. Using phase graphs of Ti-Si-C, 12 reactions occurring possibly during TIG arc deposition on the titanium alloys were analyzed by thermodynamics. The thermodynamic calculation results showed that titanium can react with SiC, Si and C to forming ceramic phases of TiC and Ti3SiC2 and intermetallic compound of Ti5Si3 and TiSi2. The theoretical analysis results showed that the phases of deposition layers can be predicted using thermodynamic analysis by changing the compositions of different raw materials on the TIG arc conditions. The experiment results showed that the prediction results were corresponding well with experiments results. |
| Key words: tungsten argon arc deposition ceramic deposition layers phase thermodynamic prediction |
