Effects of proton irradiation on the microstructure and mechanical properties of Amosic-3 silicon carbide minicomposites

• DOI: 10.1016/j.jmst.2019.08.016
• Publication Date: 2019-09-04T23:21:15Z
• Authors: Chuanxin Liu; Bo Chen; Xiaoqiang Li; Yahuan Zhao
• Keywords: Pyrolytic carbon; Chemical vapor infiltration

Abstract One dimensional Amosic-3 silicon carbide fiber reinforced silicon carbide matrix composites (SiCf/SiC minicomposites) prepared by chemical vapor infiltration were irradiated with 2.8 MeV proton ions. The ion fluences were 1.0 × 1017 and 1.5 × 1017 cm−2 at room temperature and 300 °C, respectively. The microstructure and mechanical properties were investigated before and after proton irradiation. Raman spectra showed no evident change in Amosic-3 fibers regardless of irradiation temperature, which is confirmed by high resolution transmission electron microscopy observation. Pyrolytic carbon interphase showed slightly expansion after 300 °C irradiation, however, no microstructure changes were observed in SiC matrix. Moreover, it can be deduced that no irradiation induced changes in mechanical properties were observed after present proton irradiation.