Compressive behavior of the SiC-NWs/MCF composites with a designed double-nest microstructure
- 102 Downloads
The microstructure is a key factor for the comprehensive performance of carbon foam, especially for mechanical property. SiC nanowires/melamine-based carbon foam composites with a designed controllable double-nest microstructure were fabricated, which was made of a kind of hairy structure consisting of carbon skeleton with SiC nanowires sprouting out from them. This composite was ultralight with a minimum density of 5.56 mg/cm3. It also exhibited a good mechanical property that the compressive strength was improved to 45.67–73.11 kPa for each different microstructure, which is over 3–4.8 times than that of the matrix. This straining process of this designed double-nest microstructure was further investigated, and three mechanical models were built based on the octahedral model for analyzing the compressive process of this composite. By calculating and simulating the proposed model C, we obtained an empirical equation, and it was successfully utilized to calculate the compressive stress of this double-nest microstructure.
The present work was supported by the National Natural Science Foundation of China (Grant Nos. 51772151, 51804169, 51761145103 and 51905268). This work was also supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
- 6.Letellier M, Macutkevic J, Bychanok D et al (2017) Modelling the physical properties of glasslike carbon foams. J Phys: Conf Ser 879:012014Google Scholar
- 12.Yu S, Chen Z, Wang Y, Luo R, Pan Y (2017) A study of thermal insulation properties and microstructure of ultra-light 3D-carbon foam via direct carbonization of polymer foam. J Porous Mat 10:1–10Google Scholar
- 15.Yu S, Chen Z, Tao H, Wang Y, Pan Y, Liao J (2017) Influence of CVI-SiC coating on properties of carbon foam. J Nanjing Univ Aeronaut Astronaut 49(6):865–871Google Scholar
- 19.Liu Y, Chen Z, Zhang J, Ai S, Tang H (2019) Ultralight and thermal insulation carbon foam/SiO2 aerogel composites. J Porous Mat 7:1–8Google Scholar
- 24.Liu P (2010) Analyses of buckling failure mode for porous materials under compressive strength. Acta Phys Sin-ch Ed 59(12):8801–8806Google Scholar
- 25.Liu P (2000) The tensile strength of porous metals with high porosity. J Adv Mater-Covina 32(2):9–16Google Scholar
- 29.Abderrazak H, Hmida ESBH (2011) Silicon carbide: synthesis and properties. In: Properties and applications of silicon carbide ceramics. Springer, p 375Google Scholar