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为研究自蔓延和热爆两种燃烧合成方式对产物Ni3Al组织的影响,采用扫描电子显微镜(SEM)观察对比了合成试样中的不同显微组织,利用X射线衍射(XRD)分析比较了合成产物相的差别,并通过透射电镜(TEM)比较了两种方式下合成相粒子析出情况。结果表明:自蔓延反应产物形成共晶组织,热爆反应则生成枝晶组织;虽然两种方式反应物的XRD分析结果相同,但是自蔓延反应产物的相峰强度显著高于热爆反应产物;热爆反应产物相粒子产生的偏聚比自蔓延反应产物相明显。
In order to study the effect of self-propagating and thermal explosion on the Ni3Al structure of the product, different microstructures in the synthesized samples were observed by scanning electron microscopy (SEM), and the results of XRD Product phase differences, and by transmission electron microscopy (TEM) to compare the two methods of precipitation of synthetic phase particles. The results show that the self-propagating reaction product forms eutectic structure and the detonation reaction produces dendritic structure. Although the XRD analysis results of the two reactants are the same, the phase intensity of the self-propagating reaction product is significantly higher than that of the thermal explosion reaction product; The segregation produced by the phase of the thermal explosion reaction product particles is more obvious than that of the self-propagating reaction product.