Abstract:Under the monitoring of the universal testing machine platform, ZrC ceramics were prepared by self-propagating high-temperature synthesis/single action pressing (SHS/SAP) dynamic combing self-propagating high-temperature synthesis /pseudo–hot isostatic pressing (SHS/PHIP). The relationship between rules of displacement, load curve changing and technology parameters of SHS/PHIP plus the effects of pressure on microstructure and densification of the products were studied. Displacement and load curve were recorded by the universal testing machine platform, using XRD and SEM to demonstrate the phase constitution and microstructure of products, and the density was measured by the drain away liquid way. Our results indicate that the ended time of SHS reaction and the plasticity period of time of products were demonstrated by displacement and load curves, which can be used as parameters of pressure applying moment and dwell time of SHS/PHIP. With the increasing pressure, extrusion deformation of ZrC grain surface was more obviously, leading to the sintering necks in the pressur of 120MPa. Density was increased along with the pressure and with a peak of 93.7%, and the involved mechanism includes crystal particles rearrangement and plastic defomation.