Multilayer Fiber Interfaces for Improved Environmental Resistance and Slip

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NAS8-03010
Agency Tracking Number: 024136
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
12173 Montague St, Pacoima, CA, 91331
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jason R. Babcock,
 (818) 899-0236
Business Contact
 Craig Ward
Title: Engineering Administrative Mgr
Phone: (818) 899-0236
Research Institution
Application of ceramic matrix composites (CMC) reinforced with carbon fibers can potentially enhance the efficiency and performance, reduce the weight, improve the durability, and lower the cost of rocket engine combustion devices and turbomachinery components used in high temperature, high-stress environments. Meeting these objectives requires improvements in fiber-reinforced CMC materials and fabrication processes, particularly improved fiber/matrix interfaces, interface deposition processes, and oxidation protection. Although carbon fibers are most desirable as CMC reinforcements, their low oxidation resistance has prevented their use in high temperature oxidizing environments. In previous work, Ultramet developed a unique and innovative process, ultraviolet-enhanced chemical vapor deposition (UVCVD), which allows deposition of dense, strain-tolerant oxides at room temperature, thus avoiding heat-induced material degradation and providing excellent material performance, including enhanced oxidation protection. However, identifying a single phase that best performs the two key functions of the interface coating, oxidation protection and interface slip, simultaneously has thus far proven elusive. In this project, the UVCVD process will be developed specifically for deposition of multilayered interface coatings in which separate components will perform these two functions, resulting in optimum composite performance.

* Information listed above is at the time of submission. *

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