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Temperature–Time–Mechanical Properties of Glass–Ceramics Produced from Coal Fly Ash
Author(s) -
Kim Jae Myung,
Kim Hyung Sun
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00280.x
Subject(s) - fly ash , materials science , microstructure , ceramic , fracture toughness , composite material , toughness , crystallization , flexural strength , glass ceramic , coal , waste management , chemical engineering , engineering
Physical and mechanical properties of glass–ceramics fabricated from thermal power plant fly ash were analyzed and compared with suggest a temperature–time–mechanical (T–T–M) diagram. Coal fly ash with SiO 2 –Al 2 O 3 –MgO–CaO as major components and TiO 2 as a nuclear agent were used to develop glass–ceramic materials which were heat treated at 900°–1050°C for 0.5–4 h for crystallization. It was verified that the high aspect ratio of unknown crystallines in the microstructure contributed high hardness, strength, fracture toughness, and wear resistance. These results are correlated with heat treatment conditions and microstructure and a T–T–M properties (hardness, strength, elastic constant, toughness, and wear rate) diagram on glass–ceramics produced from coal fly ash is proposed.