ABSTRACT
This chapter describes conventional methods for forming ceramic powders into green articles that rely on the use of traditional tools such as dies or molds. The conventional ceramic forming methods are divided into three categories: dry or semidry pressing, suspension-based techniques, and plastic forming methods. In describing these methods, the chapter also emphasizes the key process variables and how they can be manipulated to optimize the microstructure of the green article. Several types of microstructural defects may be present in green articles formed by slip casting. In die compaction, a powder or a granular material undergoes simultaneous uniaxial compaction and shaping in a rigid die. The overall process consists of three steps: die filling, powder compaction, and ejection of the compacted powder. Extruders and molding machines used in the plastics industry are employed, but some modification of the machines is often required for ceramic systems.
