Specialty Materials, Inc.
SCS-Ultra™SILICON CARBIDE FIBER
SCS-Ultra™ silicon carbide fiber, a 1M psi tensile strength fiber was developed to meet the most demanding applications for aerospace materials. In the mid-1990s, turbine engine manufacturers wanted a fiber that could withstand the fabrication conditions of titanium aluminde to make a composite for use in rotating engine parts. Using its own resources, SMI developed SCS-Ultra™, a fiber with very fine silicon caribde crystallites (200 nm or less) that is 50% stronger and 10% stiffer than SCS-6 fiber and is stable at temperatures above 2500 deg F. Several high temperature titanium aluminide composite turbine engine parts were successfully developed using SCS-Ultra™ as the fiber reinforcement.
In addition to its outstanding effectiveness in titanium aluminide composites, SCS-Ultra™ is also extremely effective as a reinforcement for ceramic matrix composites. NASA Glenn Research Center has concluded that the most critical determinant for the high-temperature thermo-structural performance of a ceramic matrix composite is its creep-rupture strength, which in turn is highly dependent upon the creep resistance of the fiber. NASA has found that the most creep-rupture resistant fiber at high temperatures is the SCS-Ultra™ manufactured by Specialty Materials, Inc.
You can learn more about the use of SCS-Ultra™ in ceramic matrix composites here.
Produced primarily in 5.6-mil diameter
- Beta silicon carbide on (33μm) carbon monofilament
- Smooth surface with duplex SiC/C coating
- Finer grain size results in the highest strength and modulus
- Designed for use in titanium aluminide metal-matrix composites
- Most creep-rupture resistant fiber for use in ceramic-matrix composites
- Surface texture not optimum for interface with resin matrices