利用元素间强烈的放热反应，采用激光引燃自蔓延Al-Ti-C合金合成铝合金晶粒细化中间合金。结果显示,所合成Al-50(TiC)中间合金内部作为异质核心的形核粒子TiC呈颗粒状，平均尺寸小于1 μm，粒子弥散分布，TiAl3呈长条状，中间合金加入铝熔体内，形核粒子较容易弥散开来。保温90 min未出现聚集成团现象，具有良好抗衰退能力。在所述实验条件下可使工业纯铝平均晶粒尺寸细化为150 μm以下，差示扫描量热法(DSC)热分析曲线出现一个尖锐的吸热峰和一个浑圆的放热峰。同时分析了激光引燃自蔓延合成的过程。

Al-Ti-C refining master alloys, reaction among whose composing elements are exothermic, are fabricated by laser induced self-propagating high-temperature synthesis. Results show that TiC particles average size is less than 1 μm and distributes dispersedly and TiAl3 is strip-like in Al-50(TiC) master alloys. The master alloys have excelent refining efect on pure aluminium. The aluminium grain average size decreases to less than 150 μm after adding 0.1% the master alloys which have good resist-decline ability. There are a sharp endothermal peak and a obtuse exothermic peak on the differential scanning calorimetry (DSC) curve. The reaction process of self-propagating high-temperature synthesizing the master alloys is analyzed.