用 4 0WCO2 激光器点火 ,在氩气保护的容器中自蔓延合成Mg Ni合金。细致观察了激光诱导自蔓延高温合成反应的燃烧过程 ,对合成的试样进行了X射线衍射分析 (XRD)、扫描电镜分析 (SEM )。结果表明 ,用激光自蔓延方法可以制备Mg2 Ni金属间化合物 ,且产物中没有普通制备方法中易于出现的杂质MgNi2 等 ,氧化也很少 ;获得的样品呈层状、孔隙多 ,这是由样品的制备及反应过程所决定的。 Ignite with a 40 WCO 2 laser and self-propagate a Mg Ni alloy in an argon-protected vessel. The combustion process of laser-induced self-propagating high temperature synthesis reaction was carefully observed. The synthesized samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that Mg2Ni intermetallic compounds can be prepared by laser self-propagating method, and MgNi2, which is easy to appear in common preparation methods, is not produced in the product. There is little oxidation. The samples obtained are lamellar and porous, The preparation and reaction process.