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Development of High-Strength Glass–Ceramic Materials by Utilization of Slag Discharged from Steel-Making Industry in Korea

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Every year 25 million tons of slag is generated as an industrial by-product by the steel-making industry in Korea. Using slag to manufacture high-strength glass–ceramic materials is increasingly becoming a feasible option, and recently several types of slag have been used in combination to manufacture glass–ceramic materials such as basalt-based glass–ceramics. Glass–ceramic materials with two different chemical compositions were prepared using Fe–Ni slag, basic oxygen furnace slag, dephosphorization slag, and fly ash by melting and casting and a subsequent heat treatment. X-ray diffraction analyses confirmed that clinopyroxene and CaAl2SiO8 were the primary phases in the formed glass–ceramics, while thermogravimetry and differential thermal analyses showed that their glass-transition points were 709–724 °C and crystallization temperatures were 888–918 °C. The morphologies and constituent components were also examined using field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. The stable phases were calculated as functions of the temperature using FactSage. Finally, the compressive strength, Vickers hardness, and wear rate values of the glass–ceramics were evaluated in order to elucidate their physical properties.
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Keywords: CAST BASALT; CASTING; GLASS–CERAMICS; RECYCLING; SLAG

Document Type: Research Article

Publication date: December 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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