Abstract
Hot isostatic pressing (HIP) of powders is the manufacturing process which forms high quality and fully dense components from such materials as superalloys, tool steels and a wide range of ceramics. It is well known that the powder compacts reduce their volume due to density change, and the products usually differ in size from the final desired shapes. With the increasing demand for near net forming, simple and systematic way is greatly required to select the optimum process variables without trial and error procedures.In this paper, analytical method is presented to predict the sintering deformation behavior during HIP process. Three parts of governing equations are made up: heat conduction equation including matter flow, densification rate equation which describes density change, and shape change equation based on the conservation of mass. Effects of particle radius, HIP temperature, pressure and HIP cycle are discussed on the results of computer simulation of alumina powders.
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