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High Temperature Structural Materials for Advanced Air Force Systems

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
1995 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1995
Title: High Temperature Structural Materials for Advanced Air Force Systems
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $80,000.00


Conventional composite processing techniques are presently unable to fabricate Al1O3-fiber reinforced y-titanium aluminide matrix composites based on low cost, small diameter ( 5-20um) fibers. The primary problem is one of infiltration of the matrix in between the fibers without any degradation in fiber properties. Although pressure casting would be a low cost processing approach, the severe chemical attack by molten metals would limit the performance of these composites. Instead, an innovative composite processing technique for TiAl-based composites will be demonstrated wherein, starting with a commercial Al2O3 fiber tow, each fiber will be spread and individually coated with the matrix material by a plasma-assisted hollow cathode sputtering process. The fiber volume fraction within the matrix can be varied by varying the thickness of the coating. By coating all the fibers to a given thickness, a more or less constant inter -fiber spacing can be obtained in a hot-consolidated state. Such a composite processing technique is also amenable to tailoring of the fiber-matrix interface by the addition of vary thin coat of metals such as Nb for improved resistance to chemical attack by the matrix. This Nb layer can also act as a compliant layer, thereby improving the thermal cycling performance of these composites.

Principal Investigator:

Dr S Guha

Business Contact:

Small Business Information at Submission:

Mat & Electrochemical
7960 S. Kolb Rd Tucson, AZ 85706

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No