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Sintering and Characterizations of WC-20wt.% (Fe,Co) Nano-Structured Powders Developed by Ball-Milling
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نویسنده
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کرباسی مینو ,کرباسی مریم ,سعیدی علی ,فتحی محمد حسین
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منبع
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journal of advanced materials and processing - 2014 - دوره : 2 - شماره : 3 - صفحه:3 -14
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چکیده
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The aim of the present work is to study the effects of the nanostructured wc-20 wt. % (fe,co) with different ratios of iron to cobalt on the microstructure and hardness of sintered samples. furthermore, a sample with a cobalt binder under the same condition was produced for the comparison purposes. the nanocomposite development, after different milling times, has been monitored by means of x-ray diffraction (xrd), scanning electron microscopy (sem), and transmission electron microscopy (tem). a homogenous distribution of nanostructured wc (crystallite size less than 30 nm) in the binder matrix was formed after 25 h milling. the hardness and the relative density of the wc-20wt. % (fe,co) composites consolidated by conventional sintering at 1350?c were investigated. in sintered samples after 25 h milling, tungsten carbide grains have a uniform distribution with a lower grain size. densification and hardness improved after 25 h milling and reached optimum levels for the 25 h milled powders with equal ratio of iron to cobalt.
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کلیدواژه
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WC-based cemented carbides ,Ball milling ,microstructure ,Hardness ,Sintering
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آدرس
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isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan, ایران, isfahan university of technology, Instructor Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111 IRAN, ایران, isfahan university of technology, Professor Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111 IRAN, ایران, isfahan university of technology, Professor Department of Materials Engineering, Isfahan University of Technology, Isfahan, 8415683111 IRAN, ایران
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Authors
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