Residual Stress Investigation in SiC/MoSi2(p) Composites

Thermal residual stresses in SiC matrix – MoSi2 reinforced composites were investigated by Raman microprobe spectroscopy. The introduction of 10 and 30 vol% MoSi2 particles generated compressive stresses in the SiC matrix, with magnitude of about -80 and -190 MPa, respectively. X-ray diffraction was also carried out and the agreement between the two techniques was quite satisfactory. From these results, the stress-free temperature of the composites was estimated.