Patent ID: 8043684

Claim:
A disk shaped component, comprising: a center portion having a bore; and a rim concentrically disposed about said center portion, wherein said disk shaped component is formed by a composite material having at least a first material disposed proximate to said center portion forming a first layer of said disk shaped component and a second material disposed proximate to said rim forming a second layer of said disk shaped component, wherein said first material comprises a first coefficient of thermal expansion, a first stress value and a first oxidation resistance, and said second material comprises a second coefficient of thermal expansion, a second stress value and a second oxidation resistance, wherein said first coefficient of thermal expansion is in a range of 6 ppm/° F. to 8 ppm/° F. and said second coefficient of thermal expansion is in a range of 4.5 ppm/° F. to 6.5 ppm/° F., said first stress value is greater than said second stress value and said first oxidation resistance is less than said second oxidation resistance.