论文部分内容阅读
为了解Ti-B二元体系的自蔓延合成反应进行的方向和最终产物的相组成,对Ti-B二元体系燃烧合成反应生成TiB的自由焓变、自由能、反应绝热温度和燃烧温度进行了理论分析和实验研究.结果表明,Ti含量过量的情况下TiB的反应生成自由焓比TiB2的反应生成自由焓高,反应生成自由能比TiB2的更低,TiB在生成热力学上比TiB2更稳定,Ti与B的SHS反应更易生成TiB相.Ti-B二元体系的反应绝热温度和燃烧温度随着Ti含量的提高而呈下降趋势.
In order to understand the orientation of the self-propagating synthesis reaction of Ti-B binary system and the phase composition of the final product, the free enthalpy change, free energy, reaction adiabatic temperature and combustion temperature of TiB generated by the combustion synthesis reaction of Ti-B binary system The theoretical analysis and experimental results show that the free enthalpy of TiB is higher than that of TiB2 when the Ti content is too high, the free energy of reaction is lower than that of TiB2, and TiB is thermodynamically more stable than TiB2 , The TiS phase is more easily formed by the SHS reaction between Ti and B. The adiabatic temperature and the combustion temperature of Ti-B binary system decrease with the increase of Ti content.