Process for the production of thin walled ceramic structures

Details Process for the production of thin walled ceramic structures Process for the production of thin walled ceramic structures

1995-07-25

1998-01-27

Mayes, Melvin

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156224, 156246, 156264, 264632, 264633, 428 344, B32B 3104, B32B 3120, B32B 3126

Patent

active

057118337

ABSTRACT:
A process is provided for the manufacture of thin walled ceramic structures, particularly conical or near conical shaped structures. The process involves a tape casting technique wherein a green tape is prepared from a colloidal suspension containing a ceramic powder, a binder system, a plasticizer and a solvent. The suspension is cast into a thin sheet and dried to form a pliable tape. The tape is cut into planar, shaped pieces. Non-planar components of the final structure are preformed from the cut planar tape pieces into predetermined three dimensional shapes. The planar and preformed components are sequentially assembled within a die and compacted under pressure to form a green body. The green body is subjected first, to a burnout cycle to form a brown body, and then sintered to form the unitary, cohesive, thin walled ceramic structure.

REFERENCES:
patent: 4579703 (1986-04-01), Adlerborn et al.
patent: 4985103 (1991-01-01), Kouno et al.
patent: 5034604 (1991-07-01), Streetman et al.
patent: 5256609 (1993-10-01), Dolhert
Raeder, Henrik, "Fabrication of thin-walled ceramic tubes by tape casting," Materials Science Monogr. (1991), 66B(Ceram. Today--Tomorrows Ceram., Pt. B), 1123-9 (Abstract only), 1991.
Microstructure-Mechanical Property Property Relation in A1.sub.2 O.sub.3 Laminates From Proceedings of the 11th Riso International Symposium Structural Ceramics--Processing, Microstructure and Properties, 1990 pp. 217-224.
Tape Casting--Future Developments Ceramics Processing Research Laboratory--Report No. 33--pp. 1 to 20 plus drawing Published in Advances in Ceramics, vol. 9: "Forming of Ceramics" (1984).
Tape Casting of Ceramics, from Ceramic Processing Before Firing, 1978 pp. 411 to 448.

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