Thermodynamic analysis of Ti powder synthesized by SHS thermitreaction
According to the thermodynamics theories,the reactive Gibbs free energies,the reactive adiabatic temperature,the melting rate of Ti and the gasification mass of Mg in the Mg-TiO2 and Al-TiO2 systems were theoretically calculated and analyzed respectively.The results show that the reactions of Mg-TiO2 and Al-TiO2 are very easy to take place and the reaction of producing various suboxides of Ti may occur in Mg-TiO2 and Al-TiO2 reaction system; the adiabatic temperature of Mg-TiO2 becomes lower with increasing mass fraction of Mg.The adiabatic temperature is below 1 800 K when the mass fraction of excessive Mg exceeds 25％; The adiabatic temperature of Al-TiO2 also becomes lower with increasing mass fraction of Al,but it becomes higher with the preheat temperature increment.The adiabatic temperature plateau is the result of Ti melting endotherm; owing to the gasification of a great deal of Mg in Mg-TiO2 reaction process,Mg should be properly excessive in order to get Ti.
self-propagating high-temperature synthesis(SHS) thermodynamic analysis adiabatic temperature Mg-TiO2 Al-TiO2
ZHANG Peng-lin XIA Tian-dong ZHANG Guo-dong YAN Li-jing ZHAO Wen-jun
State Key Laboratory of Gansu Advanced Nonferrous Metal Materials,Lanzhou University of Technology,L College of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China Key Laboratory of Non-ferrous Metal Alloys,Ministry of Education,Lanzhou University of Technology,La State Key Laboratory of Gansu Advanced Nonferrous Metal Materials,Lanzhou University of Technology,L
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）