Method for Low Cost Batch Production of Isostatically Pressed Powder Calcium Discs.
DEPARTMENT OF THE ARMY WASHINGTON DC
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In chemical lasers, there is a need for chemical pumping material or getter material for absorbing the spent laser gases. Calcium is a chemical pump or getter material that is commonly used, however, this material must be supported in some way to be effectively used for the chemical pump or getter material. Since calcium must be kept in a dry atmosphere, and due to other support needs for this material, there is need for producing plates, discs, or wafers that contain calcium at low cost. In accordance with this invention, a method for producing a batch of isostatically pressed and calcium powder reinforced discs at low cost including providing a flexiable mother bag such as a polyvinyl chloride bag that has a cylinderical shape. A reinforced mold with a multiplicity of finger projections and with a reinforcing metal screen inserted over the fingers is first placed in a mother bag. Powdered calcium is then loaded on the mold around the fingers. Next, another reinforced mold is placed over the first calcium loaded mold and then loaded with calcium powder. This process is repeated.
- Fabrication Metallurgy