Carbon nanotubes introduced in different phases of C/PyC/SiC composites: Effect on microstructure and properties of the materials. (12th August 2015)

• Record Type: Journal Article
• Authors: Mei, Hui; Wang, Huwei; Zhang, Nan; Ding, Hui; Wang, Yuetang; Bai, Qianglai
• Is Part Of: Composites science and technology. Volume 115(2015)
• Page Start: 28
• Page End: 33
• Publication Date: 2015-08-12
• Subjects: A. Carbon nanotubes -- A. Ceramic-matrix composites (CMCs) -- B. Interfacial strength -- B. Strength -- D. Scanning electron microscopy (SEM); Composite materials -- Periodicals; Composite materials; Fibrous composites; Periodicals; 620.118
• DOI: 10.1016/j.compscitech.2015.04.005
• Languages: English
• ISSNs: 0266-3538

Abstract

Abstract: The present paper reports on the effects of carbon nanotubes (CNTs), introduced in different phases of carbon fiber-reinforced silicon carbide (C/SiC) composites, on the microstructure and properties of the material. In composites with CNTs deposited on C fibers (C/CNTs/PyC/SiC), a double-scale pull-out phenomenon, at the fiber and CNT level, was considerably more prominent than in their CNT-free counterparts; the effect was attributed to the weak CNT–PyC interface. The tensile strength and work of fracture of C/CNTs/PyC/SiC composites were found to increase by 67.3% and 107.2%, respectively, from the CNT-free case. The introduction of CNTs into the SiC matrix did not offer significant enhancement in the mechanical properties of the C/PyC/CNTs/SiC composites which exhibited brittle failure.