1993
DOI: 10.1016/0925-8388(93)90390-9
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Mechanisms governing tribochemical reduction of metals and non-metals from their oxides

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Cited by 10 publications
(6 citation statements)
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“…The leaching treatment also has the advantage of eliminating other contaminants, such as iron from the milling media, but it should be carefully controlled because the partial dissolution of the product, which becomes more pronounced with decreasing particle size, can significantly reduce the final yield. c-VC, 459 h-WC 460,461 and c-SiC 460 were also produced from V 2 O 5 -Mg-C, WO 3 -Mg-C and SiO 2 -Mg-C mixtures, respectively. For the synthesis of h-WC and c-SiC, the use of a hydrogen or hydrocarbon atmosphere has been proposed to increase the yield and to avoid the formation of secondary phases in the product.…”
Section: Carbides Nitrides Borides and Silicidesmentioning
confidence: 99%
“…The leaching treatment also has the advantage of eliminating other contaminants, such as iron from the milling media, but it should be carefully controlled because the partial dissolution of the product, which becomes more pronounced with decreasing particle size, can significantly reduce the final yield. c-VC, 459 h-WC 460,461 and c-SiC 460 were also produced from V 2 O 5 -Mg-C, WO 3 -Mg-C and SiO 2 -Mg-C mixtures, respectively. For the synthesis of h-WC and c-SiC, the use of a hydrogen or hydrocarbon atmosphere has been proposed to increase the yield and to avoid the formation of secondary phases in the product.…”
Section: Carbides Nitrides Borides and Silicidesmentioning
confidence: 99%
“…The PM 15 type soot recommended as the optimal carbon containing agent [3,4,8], as well as the acti vated carbon and natural graphite, was used to obtain comparable characteristics.…”
Section: Resultsmentioning
confidence: 99%
“…The selection of the PMMA is based on the fact that it is easily destroyed mechanically [7], and its thermal destruction in the process of the mechanochemical synthesis results in the formation of a large amount of hydrocarbon compounds promoting the process of the tungsten carbidization in the gaseous phase [3,4,8]. It was not possible to produce the final product contain ing only the WC phase using the PMMA introduction when the natural graphite was used as the carbon agent (the minimal content of the tungsten semicarbide W 2 C in the carbide composition was 12%).…”
Section: Resultsmentioning
confidence: 99%
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“…89 Such reactions are thermodynamically possible at or above room temperature and may be activated by localized heating during mechanical alloying. 90,91 Because silicon is not as ductile as barium or aluminum at room temperature, such reactions would reduce the effective ductility of the precursor. In any event, silicon or intermetallic compounds were not detected by XRD and SEM/EDX analyses after the 40 min milling treatment.…”
Section: Discussionmentioning
confidence: 99%