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,Ti_3SiC_2相和Ti_5Si_3,TiSi_2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.
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 Ti_3SiC_2 and intermetallic compound of Ti_5Si_3 and TiSi_2. 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.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2017年第5期108-111,共4页
Transactions of The China Welding Institution
基金
湖北省教育厅青年基金资助项目(010403)
关键词
钨极氩弧熔敷
陶瓷熔覆层
物相
热力学预测
tungsten argon arc deposition
ceramic deposition layers
phase
thermodynamic prediction
