Development of dual-phase SiC/Si3N4 nanostructures on nanosized SiC particles. (1st February 2020)

• Record Type: Journal Article
• Authors: Rajavel Muthaiah, V.M.; Meka, S.R.; Manoj Kumar, B.V.
• Is Part Of: Philosophical magazine letters. Volume 100:Number 2(2020)
• Page Start: 74
• Page End: 85
• Publication Date: 2020-02-01
• Subjects: Silicon carbide -- Ball milling -- SiC/Si3N4 nanostructures -- FTIR -- TEM; Condensed matter -- Periodicals; Physics -- Periodicals; Solid state physics -- Periodicals; Physique -- Périodiques; 530.41
• DOI: 10.1080/09500839.2020.1723811
• Languages: English
• ISSNs: 0950-0839

Abstract

ABSTRACT: The present study explores the reactivity of nanosized silicon carbide (SiC) with nitrogen gas in forming silicon nitride (Si3 N4 ). As-received micron-sized SiC particles were reduced to nanosized SiC particles by high-energy ball milling. Further, the ball-milled powders were heat-treated at 1300°C, 1400°C and 1500°C for 2 h in argon and nitrogen atmospheres. The heat-treated powders were characterised by employing X-ray diffraction, scanning electron microscopy, transmission electron microscopy, differential thermal analysis and thermogravimetric analysis. Heat-treatment in nitrogen atmosphere resulted in the development of amorphous and crystalline Si3 N4 nanowires/fibers/threads from the surface of nanosized SiC particles. The morphology of developed nanostructures showed a dependence on the heat-treatment temperature. The nanosized SiC powders with nanowires/fibers/threads of Si3 N4 grown on their surfaces could be used as an effective reinforcement to produce novel composites.