Journal of Shenyang Aerospace University >
Compression properties of C/SiC-ZrC quadrangular pyramid lattice structure composites
Received date: 2023-09-25
Online published: 2024-02-05
The C/SiC quadrangular pyramid lattice structure composite has the functions of lightweight,high strength load bearing,heat insulation, and so on, which can be used in the thermal protection system of hypersonic aircraft, but its mechanical properties decline significantly in high-temperature environments. In order to improve the mechanical properties of C/SiC quadrangular pyramid lattice structure composites at high-temperature,ZrC was introduced with high melting point into the matrix of C/SiC quadrangular pyramid lattice structure composites, and the C/SiC-ZrC quadrangular pyramid lattice structure composite was prepared by precursor impregnation and pyrolysis (PIP). The compressive mechanical properties of the C/SiC-ZrC quadrangular pyramid lattice structure composite were tested at room temperature after high-temperature treatment at room temperature, 1 200 ℃ and 1 600 ℃ respectively, and the corresponding elastic modulus and compressive strength of the material were obtained. Scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to observe the surface characteristics of C/SiC-ZrC quadrangular pyramid lattice structure composites after high-temperature treatment, the phase and composition of the materials before and after heat treatment were studied, the reasons for the improvement of mechanical properties of C/SiC-ZrC quadrangular pyramid lattice structure composites after high-temperature treatment were analyzed, and simultaneously a comparison was made with the mechanical properties of C/SiC quadrangular pyramid lattice structure composites. The results show that the mechanical properties of C/SiC-ZrC quadrangular pyramid lattice structure composites are significantly improved after high-temperature heat treatment.
Yang DU , Fan YANG , Zixin YUAN , Weilong WANG , Jinfang ZHAO , Ping CHEN , Xixi NIU . Compression properties of C/SiC-ZrC quadrangular pyramid lattice structure composites[J]. Journal of Shenyang Aerospace University, 2023 , 40(6) : 15 -20 . DOI: 10.3969/j.issn.2095-1248.2023.06.003
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