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Method for producing structures by isostatic compression

  • US 4,931,241 A
  • Filed: 08/06/1987
  • Issued: 06/05/1990
  • Est. Priority Date: 08/06/1987
  • Status: Expired due to Fees
First Claim
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1. In an isostatic compression process for forming compression structures, the steps comprising:

  • (a) establishing a suspension of colloidal size matrix powders in a carrier liquid;

    (b) providing a die chamber comprising a self-supporting cage structure formed of material enabling the transmission of pressure from the exterior to the interior thereof and an expansible and conformable bladder within said cage structure, said die chamber having a filter opening and a filter disposed therein which is permeable to filtrate from said colloidal suspension under an applied pressure but substantially impermeable to said matrix powders;

    (c) incorporating said colloidal suspension into the interior of said bladder; and

    (d) isostatically imposing an elevated pressure on said bladder containing said colloidal suspension within said die chamber at a pressure sufficient to dispel carrier liquid filtrate through said filter opening and maintaining said pressure for period sufficient to expel at least 20% of the liquid originally contained in said colloidal suspension through said filter opening.

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