爆破器材2025，Vol.54Issue(2)：44-50,7.DOI:10.3969/j.issn.1001-8352.2025.02.006
某增材制造用铝镁合金粉遇湿热行为的研究
Thermal Behavior of Aluminum Magnesium Alloy Powder Used for Manufacturing a Certain Additive When Exposed to Humid Environments
摘要
Abstract
Aluminum magnesium alloy powder used for additive manufacturing may cause explosion accidents in hu-mid environments.In order to investigate the danger of thermal runaway of water containing aluminum magnesium alloy powder,experiments were carried out on the onset temperature of exothermic peak,specific exothermic capacity,exother-mic behavior and hydrogen production characteristics under adiabatic conditions of the mixed system.The results show that there are two exothermic peaks in the reaction of the mixed system of aluminum magnesium alloy powder with 9%magne-sium content.The onset temperature of exothermic peak Ⅰ increases to nearly 100℃with the increase of water content.When the mass fraction of water is greater than 17%,the minimum heat release of exothermic peak II exceeds 800 J/g,and the severity level of the uncontrolled reaction is catastrophic.Due to the addition of magnesium,the severity of thermal runaway in the mixed system increased by up to200%.Under adiabatic conditions,the specific hydrogen production of the mixed system with a water mass fraction of 66%reaches the maximum value of 8.71 mol/kg,while the mixed system with a water mass fraction of 30%has the highest severity of runaway reactions,with a maximum specific heat release of 1 878.69 J/g and a revised adiabatic temperature rise of 930.10 K.It revealed the mechanism of thermal runaway caused by moisture exposure of aluminum magnesium alloy powder,providing a strong basis for the establishment of a theoretical model of thermal runaway in aluminum/water reactions.关键词
铝/水反应/严重度/热失控/反应热动力学Key words
aluminum/water reaction/severity/thermal runaway/reaction thermodynamic分类
化学工程引用本文复制引用
薄晨琦,林建,孙华,肖秋平,商照聪..某增材制造用铝镁合金粉遇湿热行为的研究[J].爆破器材,2025,54(2):44-50,7.基金项目
国家重点研发计划(2023YFC3010605) （2023YFC3010605）
