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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 587-590 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this work, β-sialon ceramics were prepared from high-aluminium fly ash viacarbothermal reduction-nitridation (CRN) and the physicochemical properties of the materials such asbulk density, apparent porosity, water absorption and flexural strength were also discussed. Theresults showed that the percentage of β-sialon phase in the product decreases as the temperatureincreases from 1400°C and the weight of the sintered specimen experienced an increase during1350°C~1450°C due to the nitridation reactions, and followed by a gradual decrease till 1550°C forthe decomposition of β-sialon. It is indicated that the optimum sintering temperature to obtain thehighest yield of β-sialon ~93% lies in 1400°C~1450°C. The SEM images revealed that the preparedβ-sialon sintered at 1400°C were mainly in shape of elongated prisms, typically ~5μm in length and0.5~1μm in width. As the temperature increased to 1500°C and above, β-sialon decomposed and thenew phases of SiC and AlN were formed at 1550°C as confirmed by XRD
    Type of Medium: Electronic Resource
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