A reaction study for Al-Ni2O3 nano self-exothermic materials

Cast -infiltration has emerged as a prevalent technique for fabricating metal matrix composites. Studying Al-Ni(2)O(3 )nano self-exothermic materials proves valuable, given their potential to enhance metal matrix composites' casting defect resolution as nano self-exothermic materials. This study analyzes reaction characteristics, mechanisms, parameter-exothermic characteristic relationships, moderating methods, and their respective influences. Reaction products from Al-Ni(2)O(3)nano self-exothermic materials include Al2O3, AlNix, and trace amounts of Al. The closer the powder's composition ratio aligns with equilibrium stoichiometry, the smaller the heat released during self-exothermic reactions; smaller powder particles result in larger self-exothermic reaction heat releases and lower reaction temperatures, with reactions ceasing when exceeding the critical size (l > 40 mu m). Different reaction environments also impact reaction products, with comparatively lesser effects on reaction temperatures. By modulating powder parameters and reaction conditions, Al-Ni(2)O(3 )nano self-exothermic materials' reaction temperature can be adjusted between 609 degrees C and 900 degrees C. Correspondingly, the reaction exotherm ranges from 232 J/g to 1560 J/g, providing heat compensation for subsequent composite material casting.