Al⁃W合金燃料的氧化过程及性能提升机理  

Oxidation Process and Performance Promotion Mechanism of the Al⁃W Alloy Fuel

作　　者：胡敖博 刘津阁 赵超越[1] 陈鹏 李鹏[1] 孙兴昀[1] 蔡水洲[3] HU Ao-bo;LIU Jin-ge;ZHAO Chao-yue;CHEN Peng;LI Peng;SUN Xing-yun;CAI Shui-zhou(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;63863 troop,Baicheng 137000,China;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]西安近代化学研究所,陕西西安710065 [2]63863部队,吉林白城137000 [3]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》2024年第1期20-30,共11页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(12202349)。

摘　　要：为阐明Al‐W合金燃料氧化性能的提升机理,结合铝热还原与超高温气雾化法制备Al‐20W与Al‐30W合金燃料,并通过热重/差热热分析、X射线衍射仪、扫描电子显微镜/能量色散谱仪对其氧化过程进行研究。结果表明,Al‐20W与Al‐30W合金燃料均含有亚稳态Al/W合金相,随温度升高Al/W合金相的种类与形态发生转变。2种合金燃料具有优于单质Al燃料的氧化性能,分别在1300℃与1500℃完全氧化,氧化产物WO_(3)全部挥发。W的存在提升了Al‐W合金燃料的氧化性能,机理为WO_(3)的挥发提供O_(2)扩散进入颗粒内部的通道;WO_(3)作为“氧运输船”向单质Al传输O,促进单质Al的氧化;WO_(3)发生进一步的化学反应,最终以气态形式挥发,促进含W相的氧化。To elucidate the promotion mechanism of the oxidation performance of the Al‐W alloy fuel,Al‐20W and Al‐30W alloy fuels were prepared by the aluminum thermal reduction and the ultra‐high temperature gas atomization,and their oxidation process were studied by thermogravimetric/differential thermal analysis,X‐ray diffractometer,and scanning electron microscope/energy dispersive spectrometer.The results indicate that Al‐20W and Al‐30W alloy fuels both contain metastable Al/W alloy phases,and the types and morphology of the Al/W alloy phases transform with increasing temperature.Al‐20W and Al‐30W alloy fuels have better thermal oxidation performance than pure Al fuel,with complete oxidation at 1300℃and 1500℃,respectively,and all oxidation products WO_(3)volatilizing.The presence of W enhances the oxidation performance of the Al‐W alloy fuels.The promotion mechanism includes:the volatilization of WO_(3)provides channels for O_(2)to diffuse into the interior of the particles.As an“O atoms transport ship”,WO_(3)transports O atoms to the pure Al phase,promoting the oxidation of the pure Al phase.WO_(3)undergoes further chemical reactions and ultimately volatilize in a gaseous form,promoting the oxidation of the phase containing W.

关 键 词：金属材料 Al‐W合金燃料 Al/W合金相 氧化过程 提升机理 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V311.3[航空宇航科学与技术—航空宇航推进理论与工程]