CVD CRB2 FIBERS FOR METAL MATRIX COMPOSITES

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$50,000.00
Award Year:
1990
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
12129
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Ultramet
12173 Montague Street, Pacoima, CA, 91331
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Andrew J. Sherman
Research Scientist
(818) 899-0236
Business Contact:
ROBERT H. TUFFIAS
GENERAL MANAGER
(818) 899-0236
Research Institution:
n/a
Abstract
EVER-INCREASING DESIGN AND PERFORMANCE REQUIREMENTS ARE PLACING INCREASINGLY SEVERE DEMANDS ON MATERIALS PROPERTIES FOR GAS TURBINE APPLICATIONS. THE OPERATIONAL CAPABILITIES OF THE SUPERALLOYS HAVE ACHIEVED DRAMATIC INCREASES IN THE LAST DECADE, BUT FURTHER INCREASES CAN BE ACHIEVED ONLY THROUGH THE ADDITION OF SECOND-PHASE REINFORCEMENTS. ACCEPTABLE REINFORCEMENTS, HOWEVER, ARE NOT YET AVAILABLE, DUE TO DRAWBACKS SUCH AS HIGH DENSITY, LOW THERMAL EXPANSION, AND POOR OXIDATION RESISTANCE. CHROMIUM DIBORIDE (CRB2) HAS A CTE MATCHING THAT OF SUPERALLOYS, GOOD OXIDATION AND CORROSION RESISTANCE, HIGH MODULUS, REASONABLE DENSITY, AND POTENTIALLY HIGH STRENGTH SUITABLE FOR SUPERALLOY REINFORCEMENT. IN THIS PHASE I PROGRAM, ULTRAMET PROPOSES TO DEMONSTRATE THE FEASIBILITY OF PRODUCING CONTINUOUS HIGH-STRENGTH CRB2 MONOFILAMENTS BY CHEMICAL VAPOR DEPOSITION (CVD) ON A SUITABLE WIRE SUBSTRATEAND EVALUATE ITS STABILITY IN CONTACT WITH VARIOUS SUPERALLOYS THROUGH THE USE OF DIFFUSION COUPLES. SPECIFIC PROGRAM GOALS INCLUDE DEVELOPING A FINE-GRAINED MICROCRYSTALLINE CRB2 MONOFILAMENT WITH A STRENGTH IN THE 100-200 KSI RANGE AND EVALUATING ITS THERMAL AND MECHANICAL PROPERTIES.

* information listed above is at the time of submission.

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