Mechanical properties of SiC/SiC composites fabricated by PIP process with a new precursor polymer

作者：Luo, Zheng^*; Zhou, Xingui; Yu, Jinshan; Sun, Ke; Wang, Fei

来源：Ceramics International, 2014, 40(1): 1939-1944.

DOI：10.1016/j.ceramint.2013.07.102

• Mechanical properties
• New precursor polymers
• PIP
• SiC/SiC composites

Three dimensional four-directional (3D4d) silicon carbide (SiC) fiber reinforced SiC matrix composites (SiC/SiC) were fabricated by the precursor impregnation and pyrolysis (PIP) process with a new precursor polymer, liquid polycarbosilane with active Si-H and 3CHaCH(2) groups (LPVCS). The densification, mechanical properties and microstructure of the SiC/SiC composites were studied. The composite processed with LPVCS exhibited excellent physical and mechanical properties. The density and the porosity of the composites were 2.16 g/cm(3) and 6.7%, respectively. The flexural strength of the composites was 619.4 MPa and fracture toughness was 29.1 MPa m(1/2). The results indicated that LPVCS was a kind of potential precursor polymer for the preparation of SiC/SiC composites.

• 出版日期2014-1
• 单位中国人民解放军国防科学技术大学