Influence of Temperature on Phase Composition of Nitridation Products from Rutile and Fly Ash

Abstract:

Rutile and fly ash powders were nitridized at different temperatures for 4 h. The influence of temperature on phase composition of nitridation products from rutile and fly ash was studied. XRD, SEM and EDS analyses show that: the phase compositions of the products was quite dependent on the reaction temperature. Mullite, O'-Sialon and X-Sialon were formed from 1400 °C to 1450 °C. Rising temperature would get Mullite nitrided. Meanwhile, O'-Sialon and X-Sialon would be nitrided and transformed into β-Sialon. At temperatures above 1550 °C, the main phases of the products were hexagonal columnar β-Sialon and irregular TiC_0.3N_0.7 grains.

• Periodical: Key Engineering Materials (Volume 492)
• Pages: 476-479
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.492.476
• Online since: September 2011
• Authors: Hai Peng Ji, Kai Chen, Zhao Hui Huang, Yang Gai Liu, Ming Hao Fang
• Keywords: Carbothermal Reduction Nitridation, Fly Ash (FA), Rutile, ß-SiAlON

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