Effect of degree of crystallinity on elastic properties of silicon carbide fabricated using polymer pyrolysis. Issue 14 (November 2016)

• Record Type: Journal Article
• Authors: Rahman, Arif; Zunjarrao, Suraj C.; Singh, Raman P.
• Is Part Of: Journal of the European Ceramic Society. Volume 36:Issue 14(2016:)
• Page Start: 3285
• Page End: 3292
• Publication Date: 2016-11
• Subjects: SiC -- Elastic modulus -- PIP -- Nanoindentation -- Atomic force microscopy; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2016.06.010
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In this study, silicon carbide (SiC) is fabricated using polymer infiltration and pyrolysis (PIP). Allylhydridopolycarbosilane (AHPCS) is used as the preceramic polymer. Final processing temperatures are varied to observe the change in microstructure as well as physical and mechanical properties. Density, porosity and thermal conductivity are determined as a function of processing temperatures. Microstructural characterization, done using atomic force microscopy (AFM) and X-ray diffraction (XRD), has revealed the presence of nanocrystalline domains with grain sizes in the range of 5–20 nm. The degree of crystallinity is determined using non-contact mode atomic force microscopy. The degree of crystallinity follows an increasing trend with processing temperature. Hardness and modulus are determined using nanoindentation, and are found to be influenced by the degree of crystallinity.