Alloys composed of refractory metals (such as niobium, tantalum, and titanium) and light metals (such as aluminumAluminum, magnesiumMagnesium) exhibit propertiesProperties including high melting points, oxidation resistance, and high strengthStrength, making them critical materials in fields such as aviation, aerospace, superconductivity, and additive manufacturingAdditive manufacturing. However, due to the significant differences in propertiesProperties of densityDensity, melting point, and vapor pressure between refractory and light metals, conventional preparation techniques of melting and powder metallurgyPowder metallurgy—which tend to involve high temperaturesTemperature and pressures—frequently result in alloy compositions that deviate from the designed targets, adversely affecting subsequent applications. To address this issue, this study proposes a method for controlling the composition of tantalum-aluminumAluminum by utilizing exothermic local chemical reactions to enhance interdiffusion of alloy components, offering a new perspective on the preparation of refractory metal alloy powders.