Patent ID: 6057022
Filing Date: 2000-05-02
Classification: C04B,C23C,F16D,Y10S,Y10T

Abstract:
A friction disk, comprising:a densified annular porous structure having a first carbon matrix deposited within said annular porous structure and a second carbon matrix deposited within said annular porous structure overlying said first carbon matrix, said densified annular porous structure having two generally parallel planar surfaces bounded by an inside circumferential surface and an outside circumferential surface spaced from and encircling said inside circumferential surface, a first circumferential portion adjacent said inside circumferential surface, and a second circumferential portion adjacent said outside circumferential surface, wherein said first and second circumferential portions are bounded by said two generally parallel planar surfaces, said second circumferential portion having at least 10% less of said first carbon matrix per unit volume relative to said first circumferential portion, said first carbon matrix and said second carbon matrix having a substantially rough laminar microstructure, and said first carbon matrix being more graphitized than said second carbon matrix.