Fabrication and ultra-high-temperature properties of lightweight carbon-bonded carbon fiber composites. Issue 17 (1st December 2019)

• Record Type: Journal Article
• Authors: Chen, Yanfei; Zhao, Yunong; Liu, Debao; Tao, Ran; Cheng, Tianbao; Ai, Shigang; Xu, Baosheng; Yang, Yazheng; Fang, Daining
• Is Part Of: Ceramics international. Volume 45:Issue 17(2019)Part A
• Page Start: 22249
• Page End: 22252
• Publication Date: 2019-12-01
• Subjects: CBCF composites -- Ultra-high temperature -- Mechanical and thermal properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.07.250
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Carbon bonded carbon fiber (CBCF) composites with different fiber volume fractions (FVFs) are prepared. This paper mainly investigates the effect of FVFs and the ultra-high temperature on the mechanical and thermal properties of CBCF composites. Experimental results show that the microstructure of CBCF composites is anisotropic, random distribution in xy direction and layering in z direction. With higher FVFs, the modulus and fracture strength are higher. The fracture strength in xy direction is greatly higher than that in z direction, because more fibers bear the load. Elastoplastic behavior of stress-strain curves is observed in z direction, which is attributed to the compression of porosity and gap. Especially, at ultra-high temperature, the plastic hardening effect is remarkable. In addition, the thermal conductivities of CBCF composites with different FVFs are characterized, which increase exponentially with temperature.