Complex-Shaped SiC/SiC Ceramic Matrix Composites via Novel, Non-Woven Preforming, Phase II

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$419,247.00
Award Year:
2007
Program:
SBIR
Phase:
Phase II
Contract:
N68335-07-C-0184
Award Id:
75273
Agency Tracking Number:
N052-096-0564
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
12173 Montague Street, Pacoima, CA, 91331
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
052405867
Principal Investigator:
ArthurFortini
Director of Science & Tec
(818) 899-0236
art.fortini@ultramet.com
Business Contact:
CraigWard
Engineering Administrativ
(818) 899-0236
craig.ward@ultramet.com
Research Institute:
n/a
Abstract
The use of ceramic matrix composites (CMCs) has the potential to increase the life and operating envelope of turbine engines. While great strides have been made in mechanical properties, CMCs still suffer from limitations in terms of shape capability, especially with complex-shaped parts such as turbine blades. Using high-strength fibers that have been woven into a fabric causes problems due to the nature of the fabric. The issues of greatest concern with regard to the preform are joining structures perpendicularly to other structures, poor interlaminar shear strength, and creating features with small characteristic dimensions such as wall thickness and radius of curvature. In Phase I, Ultramet demonstrated the fabrication of complex-shaped silicon carbide fiber-reinforced silicon carbide matrix (SiC/SiC) CMCs using a novel, non-woven preforming technique. This technique allowed the fabrication of a near-net-shape turbine blade containing thin walls, thin internal ribs, small radii of curvature, and small features, and the blade was bonded to a perpendicular support structure. Testing showed the material to have isotropic properties, and a shear strength of 8 ksi was measured. Phase II will focus on improving the tensile strength of the composite and the toughening effect of the reinforcing phase.

* information listed above is at the time of submission.

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