ABSTRACT
The process of removing binders and other organic additives from the green body is referred to as debinding. Liquids used to aid the forming process must be removed from the article prior to sintering. If the green body contains too much liquid, it will develop flaws during heating, and in extreme cases it will be disrupted by the evolution of vapour. The development of stresses in the body during drying and binder burnout can lead to problems with dimensional control, cracking, and the growth of microstructural flaws. The moisture distribution in the body during drying is important, particularly if cracking and warping are to be avoided. The term binder removal or debinding refers to the removal of binders as well as other organic additives, such as plasticizers, dispersants, and lubricants, from the green body. In thermal debinding, the binder is removed as a vapor by heating at ambient pressure in an oxidizing or nonoxidizing atmosphere, or under a partial vacuum.
