Rare earth monosilicates as oxidation resistant interphase for SiCf/SiC CMC: Investigation of SiCf/Yb2SiO5 model composites

• DOI: 10.1007/s40145-021-0560-4
• Publication Date: 2022-03-22T02:03:42Z
• Authors: Xirui Lv; Mengkun Yue; Xue Feng; Xiaoyan Li; Yumin Wang; Jiemin Wang; Jie Zhang; Jingyang Wang
• Keywords: Spark Plasma Sintering; Ceramic matrix composite; Interphase

Abstract Model composites consisting of SiC fiber and Yb 2 SiO 5 were processed by the spark plasma sintering (SPS) method. The mechanical compatibility chemical stability between studied to evaluate potential application monosilicate as interphase silicon carbide reinforced ceramic matrix composite (SiC f /SiC CMC). Two kinds interfaces, namely bonding achieved adjusting temperature. /Yb interfaces prepared at 1450 1500 °C exhibit high interface strength debond energy, which do not satisfy crack deflection criteria based on He-Hutchison diagram. Raman spectrum analyzation indicates that thermal expansion mismatch contributes compressive stress interface, leads interfacial parameters. Amorphous layer in model sintered 1550 is related diffusion promoted temperature DC electric filed during SPS. It inspired parameters could be adjusted introducing Si O 7 −Yb with controlled composition optimize fuse mechanism CMC.