Rare earth monosilicates as oxidation resistant interphase for SiCf/SiC CMC:Investigation of SiC_(f)/Yb_(2)SiO_(5)model composites

作     者：Xirui LV Mengkun YUE Xue FENG Xiaoyan LI Yumin WANG Jiemin WANG Jie ZHANG Jingyang WANG Xirui LV;Mengkun YUE;Xue FENG;Xiaoyan LI;Yumin WANG;Jiemin WANG;Jie ZHANG;Jingyang WANG

作者机构：Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China AMLDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084China Center for Mechanics and MaterialsTsinghua UniversityBeijing 100084China Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2022年第11卷第5期

页      面：702-711页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key R&D Program of China(No.2017YFB0703201) the National Natural Science Foundation of China(No.51772302) CAS International Cooperation Key Program(No.174321KYSB20180008)。 

主　　题：silicon carbide fiber reinforced silicon carbide ceramic matrix composite(SiCf/SiC CMC) interphase rare earth(RE)silicates interfacial parameters 

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