Study on increasing density of SHS-centrifugal method metal/ceramic composite pipes

Combining the self-propagating high temperature synthesis technology (SHS method) and the centrifugal technique,a uniform ceramic layers and metal/ceramic composite pipes can be formed.The structure,phase component and distribution of ceramic layers were studied by X-ray diffraction and scanning electronic microscopy.The density,hardness and wear resistance of composite pipes were also tested.The results show that during solidification and densifying of ceramic with the addition of SiO₂,finishing temperature of solidification of the SHS reaction was decreased.Thus it allowed more time for the release of the gases and improved the fluidizing of the ceramic liquid.Therefore,the density of ceramic layers was improved.