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用差热分析（ＤＴＡ）、Ｘ射线（ＸＲＤ）、扫描电镜（ＳＥＭ）等技术研究了ＮｉＡｌ金属间化合物基复合材料（ＩＭＣｓ）的合成机理。结果表明，ＸＤ反应是许多局部自蔓燃高温合成（ＳＨＳ）过程产生的燃烧波的叠加，加热过程中高能态［Ｎｉ］，［Ａｌ］间的固态反应所放出的热充当了各个（ＳＨＳ）过程的点火源。粉坯密度是决定ＸＤ反应机制的重要因素，因为孔隙对ＳＨＳ过程中燃烧波的点燃和自蔓延起阻碍作用。
The synthesis mechanism of NiAl intermetallic matrix composites (IMCs) was studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) The results show that the XD reaction is a superposition of the combustion waves generated by many local self-propagating high temperature synthesis (SHS) processes. During the heating process, the heat released by the solid state reaction between high energy states [Ni] and [Al] The ignition source of the process. Powder density is an important factor that determines the mechanism of XD reaction because the pore hinders the ignition and self-propagation of the combustion wave during the SHS process.