Al-W体系反应性金属材料反应热性能

Thermodynamic Properties of Al-W Reactive Material System

本文对不同成分配比的Al-W体系反应性金属材料进行了热力学研究,通过对生成物相结构的检测,研究分析了Al-W体系材料的反应热力学过程,测定了不同反应物粒径匹配下反应放热量的大小。研究发现,在W含量充足的情况下,Al-W体系在660~780℃内将依次反应生成Al12W、Al5W和Al4W。另外,进一步探寻出了当W质量分数为61.03%时,Al-W体系单位质量的反应放热量最大,此时体系理论密度为5.91g/cm3。在不同粒径匹配下,使用微米级Al粉与微米级W粉时得到了-1036.2J/g的高反应放热量。

Thermodynamic properties of Al-W reactive material system with different elemental contents were investigated as the main task of this paper.The investigation involves the thermal process and reaction latent heat（exothermic value）of the reaction under different match-ups of powder particle sizes.Results show that,with adequate W content,Al-W reactive material system reacts to generate Al12 W,Al5 W and Al4 W successively within the temperature range of 660-780℃.Ingredient proportion represented by Al4 W（63.01 wt.% of W）ranks the highest exothermic value,and its theoretical density is 5.91 g/cm3.Under different powder particle size match-ups we studied,reaction with micron-scale Al powder and micron-scale W powder gets the highest exothermic value,which is-1036.2 J/g.