S041023 On-demand Duplication Process of Net-shaped Ceramic Parts by High-speed Centrifugal Compaction Process

Abstract

On-demand duplication process of net-shaped ceramic parts is developed. The essential problem of ceramic duplication process is shrinkage during sintering, that is, green compacts cannot be made by replica of teeth, for example. To compensate such shrinkage, we develop a resin expansion process using supercritical fluid impregnation technique. A shell type mold with enlarged product shape cavity is taken from expanded original mold. The shell mold is buried into alumina slurry and compacted by high-speed centrifugal compaction process (HCP). In this research, appropriate resin for expansion process is selected and relationship between impregnation condition and expanding ratio is evaluated. The HCP with buried shell mold is also performed and obtained densely packed green compacts. A hydrostatic pressure generated during the HCP avoids collapse of weak shell mold during the compaction. The shell mold is thermally decomposed completely in subsequent heating process.