FORMING OF CERAMIC POWDERS BY CYCLIC-CIP - QUANTITATIVE-EVALUATION OFDENSIFICATION BEHAVIOR

A new quasi-quantitative constitutive equation of Cyclic-CIP, which co ntains maximum pressure, bias pressure and number of cycles as variabl es, was derived. Densification of powder was expressed as a function o f maximum pressure assuming that densification rate decreases as the m aximum pressure increased. Effect of number of cycles on densification was expressed assuming that densification rate decreases as the numbe r of cycles increased. Effect of the bias pressure was derived from th e experimental data as a linear function of the ratio of the bias pres sure to the maximum pressure. As a result of analysis of experimental data for two kinds of alumina with this equation, their densification behavior was found to be better characterized by the equation.