Multilayer compressive seal for sealing in high temperature devices
AssigneeBattelle Memorial Institute
InventorsYeong-Shyung Chou, Jeffry W. Stevenson
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Abstract
A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600° C. to about 850° C.
Claims11
A multilayer compressive seal having superior thermal cycling stability for sealing in high temperature devices, the seal comprising:
- a sealing member disposed between a first and a second compliant interlayer;
- wherein said sealing member comprises a mica paper having a plurality of mica members therein infiltrated with at least one glass forming material sealing a plurality of leak paths between said plurality of mica members within said sealing member at an operating temperature of said compressive seal;
- and
- wherein said sealing member provides a sufficiently low effective leak rate in said compressive seal effectively sealing said compressive seal at said operating temperature.
Dependencies are inferred from the claim text.