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Multilayer susceptors for achieving thermal uniformity in induction processing of organic matrix composites or metals

  • US 5,808,281 A
  • Filed: 06/06/1995
  • Issued: 09/15/1998
  • Est. Priority Date: 04/05/1991
  • Status: Expired due to Term
First Claim
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1. A method for processing a workpiece at two different temperatures, comprising the steps of:

  • (a) sealing the workpiece in a multilayer retort, wherein a second, inner metal sheet has a higher Curie temperature than a lower Curie temperature of a first, outer metal sheet, the second sheet being in contact with the workpiece;

    (b) inductively heating the workpiece to about the first Curie temperature by inducing currents in the first sheet; and

    (c) inductively heating the workpiece to about the second Curie temperature when the first sheet becomes nonmagnetic by inducing currents in the second sheet.

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