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NOVEL, MOSI2-BASED COMPOSITES WITH SURFACE COMPRESSIVE STRESSES

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
17777
Program Year/Program:
1992 / SBIR
Agency Tracking Number:
17777
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Materials & Systems Research, Inc.
5395 West 700 South  Salt Lake City , UT -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1992
Title: NOVEL, MOSI2-BASED COMPOSITES WITH SURFACE COMPRESSIVE STRESSES
Agency / Branch: DOD / DARPA
Contract: N/A
Award Amount: $48,715.00
 

Abstract:

FLAW SENSITIVITY LIMITS APPLICATIONS OF CERAMICS IN SEVERAL STRUCTURAL APPLICATIONS. MAJORITY OF FAILURES ORIGINATE FROM SURFACE FLAWS INTRODUCED DURING SERVICE. ENHANCED RESISTANCE TO CONTACT-INDUCED DAMAGE SHOULD SIGNIFICANTLY INCREASE APPLICATION OF CERAMICS. THREE LAYER COMPOSITES CONSISTING OF SURFACE COMPRESSIVE ZONES DESCRIBED IN THIS PROPOSAL EXHIBIT EXTREMELY HIGH RESISTANCE TO CONTACT DAMAGE. EVEN AFTER INDENTING WITH A VICKER'S INDENTER UNDER 1000 N (225 LBS.) LOAD, THE STRENGTH IS RETAINED TO GREATER THAN 600 MPA (100 KSI). IN THE PRELIMINARY WORK, THIS WAS ACHIEVED IN AL(2)0(3)-ZRO(2) BY FORMING LAYERED STRUCTURES WITH OUTER LAYERS CONTAINING UNSTABILIZED ZIRCONIA AND ALUMINA. THE TECHNIQUE IS NOT LIMITED TO OXIDES. IT IS PROPOSED THAT MOSI(2)-BASED THREE LAYER COMPOSITES WITH SIC AND MULLITE AS OUTER LAYERS IS PROPOSED. STRENGTHS IN EXCESS OF 2 GPA WITH EXCELLENT DAMAGE RESISTANCE IS ANTICIPATED. THE EFFECT OF SURFACE COMPRESSIVE STRESSES WILL BE TO ENHANCE THE RELIABILITY OF STRUCTURAL CERAMICS. ANTICIPATED BENEFITS/POTENTIAL APPLICATIONS - THE DEVELOPMENT OF STRUCTURAL CERAMICS WITH EXCELLENT RESISTANCE TO CONTACT-INDUCED DAMAGE, WHICH IS THE MAIN SHORTCOMING OF CERAMICS, AND STRENGTH RETENTION TO 1400¿C WILL BE THE PRINCIPAL BENEFIT. THESE CERAMICS WILL HAVE APPLICATIONS AS WEAR PARTS, VALVE SEATS, ARMOR PLATES, CUTTING TOOLS, DIESEL ENGINE PARTS AND CERAMIC TURBINES.

Principal Investigator:

Jan-fong Jue
8012774602

Business Contact:

Small Business Information at Submission:

Materials And Systems
2645 E, Castro Lane Salt Lake City, UT 84117

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No