Stock material or miscellaneous articles – Two dimensionally sectional layer – Next to unitary web or sheet of equal or greater extent
Patent
1984-04-06
1985-11-19
Epstein, Henry F.
Stock material or miscellaneous articles
Two dimensionally sectional layer
Next to unitary web or sheet of equal or greater extent
156285, 416241B, 428 55, 428333, B32B 314, F03B 312
Patent
active
045541957
ABSTRACT:
A ceramic coated abrasion resistant member and method of making are described in which a plurality of thin plates of polycrystalline ceramic material are bonded to a thicker substrate base member with an adhesive bonding material. The bonding material includes a thermosetting organic plastic adhesive and a coupling agent which forms covalent chemical bonds with the ceramic plates, base member and plastic adhesive. An organosilane, such as .gamma.-aminopropyl trimethoxy silane, may be used as the coupling agent. The ceramic material may be selected from the group consisting of aluminum oxide, zirconium oxide, silicon carbide, silicon nitride, and spinel ceramic materials. The substrate member is preferably metal, such as steel and the plastic adhesive may be an epoxy resin. The ceramic coated abrasion resistant member may be an impeller blade such as the blades of a high speed fan for conveying coal dust or other abrasive particulate material through a conduit, or the blades of a pump impeller for pumping abrasive liquid. In the process for making the abrasion resistant member, the substrate base member and the ceramic plates are coated on the surfaces to be bonded with a thin layer of coupling agent of about one molecule thickness before they are bonded together with the thermosetting organic plastic adhesive.
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Ormiston Thomas J.
Rulis Dean A.
Epstein Henry F.
Wilbanks International, Inc.
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