球形Al-25W合金燃料粉末的氧化行为与能量性能  

Oxidation Behavior and Energy Performance of the Spherical Al⁃25W Alloy Fuel Powder

作　　者：胡敖博 蔡水洲[1] 邹辉[1] HU Ao-bo;CAI Shui-zhou;ZOU Hui(State Key Laboratory of Material Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料科学与工程学院材料成型与模具技术国家重点实验室,湖北武汉430074

出　　处：《含能材料》2023年第8期743-752,共10页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(51871106)。

摘　　要：为了获得热氧化与能量释放性能优异的新型合金燃料,采用铝热还原与超高温气雾化结合的方法,制备了球形铝钨合金燃料粉末(Al-25W),对其物相结构、氧化行为及能量性能进行了研究。结果表明,球形Al-25W合金粉末颗粒内部的亚稳态Al/W合金相均匀分布在单质Al基体中,且通过稳定化处理后亚稳态Al/W合金相转变为Al12W相,并对外释放能量。球形Al-25W合金粉末具有比单质Al粉更高的氧化放热量与氧化增重,能在1400℃空气中完全氧化,且W原子全部氧化为WO3并以气态形式挥发,残留氧化产物仅为Al2O3。球形Al-25W合金粉末的实测体积燃烧焓超过单质Al粉的理论体积燃烧焓(83000 J·cm^(-3)),可达(83132.1±608.5)J·cm^(-3),且剧烈燃烧时生成气态燃烧产物WO3。In order to obtain a new type of alloy fuel with excellent thermal oxidation and energy release performance,the spheri-cal aluminum-tungsten alloy fuel powder(Al-25W)was prepared by the combination of aluminothermic reduction and ultra-high temperature gas atomization.The phase structure,oxidation behavior,and energy properties of the alloy powder were studied.The results show that the metastable Al/W alloy phase in the spherical Al-25W alloy powder particles is uniformly distrib-uted in the pure Al matrix,and transform into the Al12W phase after the stabilization treatment,and the energy is released to the outside.The spherical Al-25W alloy powder has higher oxidation heat release and oxidation weight gain than pure Al powder.It can be completely oxidized in air at 1400℃,with all W atoms oxidized to WO3 and volatilized in the gaseous form.The residual oxidation product is only Al2O3.The measured volumetric combustion enthalpy of the spherical Al-25W alloy powder is higher than that of pure Al powder(83000 J·cm^(-3))calculated theoretically,up to(83132.1±608.5)J·cm^(-3),and the gaseous combus-tion product WO3 is generated during the violent combustion.

关 键 词：Al-25W合金粉末 铝热还原 超高温气雾化 Al/W合金相 氧化行为 能量性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V311[航空宇航科学与技术—航空宇航推进理论与工程]