Chemically Modified SiC/SiC for In Situ Growth of Nonvolatile, Environmental Barrier Scale

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-09-C-0274
Agency Tracking Number: N091-011-1567
Amount: $79,938.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2009
Solicitation Topic Code: N091-011
Solicitation Number: 2009.1
Small Business Information
Thor Technologies, Inc.
3013 Aztec Road NE, Albuquerque, NM, 87107
DUNS: 099725108
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Larry Kepley
 President
 (505) 830-6986
 ljkepley@thortech.biz
Business Contact
 Vicki Schwab
Title: President
Phone: (505) 830-6986
Email: vmschwab@thortech.biz
Research Institution
N/A
Abstract
For significant advancements to occur in the implementation of ceramic matrix composites (CMCs) in aeroengine airfoil applications, silicon carbide (SiC) ceramic matrix that forms corrosion resistant scale is needed for the combustion environment. Particularly troublesome is the accelerated surface oxidation and recession that proceeds due to reaction of the native silica scale with steam in the high-temperature turbine environment. As opposed to the more convention application of environmental barrier coatings (EBC) by plasma spray to meet this challenge, the proposed effort will develop an steam-resistant matrix material for use in SiC/SiC CMCs. More specifically, chemically modified SiC-matrix CMC panels will be fabricated by PIP processing using rare earth-doped polymer precursors. Evaluation of the resulting CMCs will proceed by measuring their oxidation resistance under aggressive, accelerated aging conditions (steam + O2 at high temperatures) that simulate harsh aeroturbine environment. A wide variety of materials property testing will be performed to measure the mechanical effects on the effect of doping the matrix both before and after aging of specimens.

* information listed above is at the time of submission.

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