FRACTOGRAPHY OF ADVANCED SILICON NITRIDE MATERIAL FOR TURBINE APPLICATIONS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$49,971.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
5635
Agency Tracking Number:
5635
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2425 S 900rd W, Salt Lake City, UT, 84119
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DAVID W RICHERSON
(801) 486-5071
Business Contact:
() -
Research Institute:
n/a
Abstract
SOME CERAMICS HAVE VERY HIGH TEMPERATURE STABILITY AND STRENGTH COMPARED TO STRUCTURAL METALS AND HAVE POTENTIAL TO BE USED UNCOOLED IN ADVANCED GAS TURBINE ENGINES. ONE CANDIDATE FAMILY OF CERAMICS WITH AN ESPECIALLY GOOD COMBINATION OF THERMAL PROPERTIES AND POTENTIAL MECHANICAL PROPERTIES IS SILICON NITRIDE. RECENTLY DEVELOPED ALLOYS OF SILICON NITRIDE LOOK PARTICULARLY PROMISING, BUT REQUIRE FURTHER CHARACTERIZATION TO MAKE A REASONABLE ASSESSMENT. THE HIP SILICON NITRIDE FROM NORTON COMPANY IS PROPOSED AS AN INITIAL CANDIDATE FOR EVALUATION. THE EVALUATION WILL CONSIST OF STRENGTH TESTING OF AS-FABRICATED AND THERMALLY-AGED TEST BARS AND CONDUCTING DETAILED FRACTURE ANALYSIS TO DETERMINE THE STRENGTH-LIMITING CHARACTERISTICS OF THE MATERIAL. THIS INFORMATION WILL THEN BE USED TO ASSESS THE POTENTIAL FOR FURTHER IMPROVEMENT OF MONOLITHIC SILICON NITRIDE AND THE FEASIBILITY OF RELIABLE OPERATION UNDER GAS TURBINE CONDITIONS. THE ASSESSMENT WILL CONSIDER CERAMIC COMPOSITES AS AN ALTERNATIVE AND RESISTANCE TO CRACK PROPAGATION AS AN ALTERNATIVE TO RESISTANCE TO CRACK INITIATION.

* information listed above is at the time of submission.

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