Frozen Slurry-based Selective Laser Gasification to Fabricate Ceramic Parts with Foam Structure

摘要

This paper presents a rapid prototyping (RP) method of frozen slurry-based selective laser gasification for fabricating ceramic parts with foam structure. The slurry is composed of ceramic powder and water glass. The processing of a layer of green part involves casting, freezing and scanning. After accumulation and moulding, the sample is placed into water to melt and remove the excess materials. In the process of laser scanning, the gasified ice crystals make water glass foam and form the foam structure. The freezing method helps to improve the stability and strength of the paved layer. The foam structure of different sizes can be obtained by adjusting the laser processing parameters.