Sintered shaped body, whose surface comprises a porous layer...

Details Sintered shaped body, whose surface comprises a porous layer... Sintered shaped body, whose surface comprises a porous layer...

2006-07-11

2006-07-11

Stein, Stephen (Department: 1775)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S316600, C428S318400, C428S318600, C428S319100, C428S332000, C428S336000, C427S372200, C427S243000, C427S343000, C427S245000, C427S299000, C427S373000, C427S429000

Reexamination Certificate

active

07074479

ABSTRACT:
Porous coatings on high-performance ceramics attempt to combine the mechanical and thermal characteristics, which fulfil stringent demands, of the substrate material with the advantageous properties of coating materials. The subsequent application of layers of this type to the pre-sintered substrate produces unsatisfactory results in several areas of use with regard to possible layer thickness, porosity and adhesion. According to the invention, a shaped body consisting of a sintered, inorganic material, whose surface comprises a porous layer is produced in such a way that the base body is first formed as a green body. A layer in the form of a suspension, also containing an inorganic material, is then applied to the surface or to one section of the surface of the base body. A predetermined fraction of a pore-forming substance is mixed with at least the material of said layer and the green body with its applied layer is subjected to the thermal treatments required for producing a monolithic sintered body.

REFERENCES:
patent: 3855638 (1974-12-01), Pilliar
patent: 5240480 (1993-08-01), Thorogood et al.
patent: 5866245 (1999-02-01), Toriyama et al.
patent: 26 20 694 (1976-11-01), None
patent: 0 328 041 (1989-08-01), None
patent: 0 832 865 (1998-04-01), None

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