"EVALUATION OF EROSION RESISTANCE IN A SIMULATED FBC ENVIRONMENT OF COATINGS APPLIED USING A HYPERSONIC SPRAY PROCESS"

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$500,000.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
11563
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Holtgren Inc.
P O Box 262, Kenilworth, NJ, 07033
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
DR. EDWARD R. BUCHANAN
PRESIDENT
(201) 686-2332
Research Institution:
n/a
Abstract
IT HAS BEEN DEMONSTRATED THAT COATINGS DEPOSITED BY A RECENTLY-DEVELOPED PROCESS CALLED THE HYPERSONIC FLAME SPRAY PROCESS ARE HARDER, DENSER, AND LESS POROUS THAN COATINGS APPLIED BY PLASMA SPRAY OR CONVENTIONAL FLAME SPRAYTECHNIQUES. AS SUCH, THIS PROCESS HAS THE POTENTIAL TO APPLY COATINGS ONTO THE SURFACE OF FBC SUPERHEATER TUBES WHICH ARE MUCH MORE RESISTANT TO EROSION THAN EXISTING COATINGS. SUCH A DEVELOPMENT WOULD RESULT IN REDUCED FBC MAINTENANCE COSTS AND IMPROVED RELIABILITY AND OPERABILITY. THIS PROPOSAL OUTLINES A PROGRAM TO SYSTEMATICALLY EVALUATE THE EROSION/CORROSION RESISTANCE OF A NUMBER OF COMPOSITIONSAPPLIED BY THE HYPERSONIC FLAME SPRAY PROCESS, USING THE SIMULATED FBC EROSION TEST RIG AT THE LAWRENCE BERKELEY LABORATORY TO SCREEN THE APPLIED COATINGS. THE COATINGS FORTHE MOST PART WILL BE MECHANICALLY-BLENDED MIXTURES OF A HARD CARBIDE AND A SOFTER, CORROSION-RESISTANT MATRIX ALLOY. THE CARBIDES WHICH WILL BE CONSIDERED ARE WC, CR3C2, TIC, AND NBC, AND THE MATRIX CONSTITUENTS WILL BE FECRALY, NICRMO, AND COCR. WE WILL COMPARE THE EROSION/CORROSION RESISTANCE OF THESE TO A NUMBER OF UNCOATED TUBE ALLOYS AND TO SOME CONVENTIONAL COATINGS, INCLUDING CERAMIC COATINGS AND NITRIDED AND CHROMIZED COATINGS. WE PLAN IN ADDITION TO EVALUATE AT LEAST TWO TYPES OF A NEW CLASS OF ALLOYS KNOWN AS AMORPHOUS METALS. THESE MATERIALS HAVE DEMONSTRATED SUPERIOR EROSION/CORROSION RESISTANCE, ANDTHERE ARE INDICATIONS THAT THEIR APPLICATION USING HYPERSONIC SPRAY ALLEVIATES THE REVERSION TO CRYSTALLINITY WHICH HAS PLAGUED THEIR APPLICATION BY PLASMA SPRAY.

* information listed above is at the time of submission.

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