METHOD FOR MANUFACTURING GRADIENT-STRUCTURAL CERAMICS USING ELECTRIC FIELD DURING SINTERING

摘要

PURPOSE: A method for manufacturing a gradient-structural ceramics is provided to control the microstructure of ceramics by changing it step-wisely or sequentially according to position using an electric field, and furthermore to induce the ceramics particle growth and the single crystal growth. CONSTITUTION: The method for manufacturing a gradient-structural ceramics comprises the steps of: forming a molded product of ceramics powder; and sintering the molded product while applying an electric field to induce the microstructural change of ceramics according to position. The sintered product has an intergranular potential occurring by the space charge at a high sintering temperature. The electric field may be applied to the sintered product in heat treatment after sintering.