Abstract
The possibility of absorbing dewax with fibrous absorbers (papers, cloths, etc.) is examined in order to make ceramic articles in near net-shape. In this new process, a low melting point wax: 75 wt.% paraffin wax, 25 wt.% microcrystalline wax and a small amount of additives, is used for a solvent. Chamotte powder is used as an example of a ceramic. The consolidated bodies containing the wax have plasticity at the proper temperature. After the wax content of the consolidated bodies has been reduced to the desired content by absorbing a part of the wax at a controlled temperature, the consolidated bodies are extruded into the desired shapes at the proper temperature. Secondary working processes such as forging can be used to make near net-shape articles. The extruded articles are further dewaxed by fibrous absorbers, followed by an evaporating dewax prior to sintering. Machining of the consolidated bodies at the proper residual wax content is also possible to make complex shaped articles. This method is successful for reducing the manufacturing cost of ceramic articles.
Published Version
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