Effect of the Matrix and Matrix Bonding on the Creep Behavior of a Unidirectional Carbon–Carbon Composite |
| |
| Authors: | George Sines Zheng Yang Brian D Vickers |
| |
| Affiliation: | Department of Materials Science and Engineering, University of California, Los Angeles, California 90024 and Department of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China |
| |
| Abstract: | Creep tests were performed on single-bundle carbon–carbon specimens at high temperatures (>2310°C) and at high stress levels (>770 MPa). It was found that the creep was very strongly dependent on the filament–matrix interfacial bond. When the bond was good, the typical creep was 3.6% after 5.9 h with the primary creep a high percentage of the total deformation. When the bond was absent (dry bundle), rupture with strain was approximately 140%, and it occurred after only 0.39 h. The marked improvement in creep resistance is attributed to the ability of the matrix to distribute loads evenly and to produce a plastic flow inhibiting triaxial stress state among the filaments. |
| |
| Keywords: | carbon-carbon composites composites creep interfaces bonds |
|
|
