Ceramic-Lined Copper Pipes Produced by A Centrifugal-SHS Process

A new technology is proposed for the ceramic lining of a copper pipe inner surface by means of self-propagating high-temperature synthesis(SHS)under the influence of a centrifugal force and additives.The technique is characterized by a large amount of the reaction heat and the centrifugal force applied to the reaction products.With the increase of the centrifugal force, the porosity, the density the compressive strength and the compressive-shear strength of the products are improved, but centrifugal force excel 200G, the compressive-shear strength of the products is decreased.Adding SiO₂ in thermite, the porosity, the density and the compressive-shear strength of the products are obviously improved.Increasing preheating temperature of thermite, the speed of thermite reactions quicken, the properties of products can also be improved.