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Composition changes of cast iron particles due to reactions in a plasma stream
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SYSNO ASEP 0352819 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Composition changes of cast iron particles due to reactions in a plasma stream Tvůrce(i) Voleník, Karel (UFP-V)
Schneeweiss, Oldřich (UFM-A) RID, ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Kolman, Blahoslav Jan (UFP-V)
Chráska, Pavel (UFP-V) RIDZdroj.dok. World PM2010 Proceedings: Powder Manufacturing and Processing; Miniaturization and Nanotechnology; Powder Pressing, 1. - Shrewsbury : European Powder Metallurgy Association, 2010 - ISBN 1899072101 Rozsah stran s. 143-150 Poč.str. 8 s. Akce Powder Metallurgy World Congress & Exhibition – PM2010 Datum konání 10.10.2010-14.10.2010 Místo konání Florencie Země IT - Itálie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Cast Iron ; Plasma Spraying ; Decarburization ; Oxidation Vědní obor RIV JG - Hutnictví, kovové materiály CEP GA106/08/1240 GA ČR - Grantová agentura ČR CEZ AV0Z20430508 - UFP-V (2005-2011) AV0Z20410507 - UFM-A (2005-2011) Anotace During atmospheric plasma spraying, considerable changes of alloy powder particles often occur. Besides spheroidization, this refers particularly to alloy composition. The present paper describes the results of a study of decarburization and oxidation of cast iron powder at the in-flight period of spraying by a water-stabilized plasma torch. Both reactions were affected significantly by particle size and feed rate. The reactions are a consequence of oxygen entrainment from the ambient atmosphere. In some cases, extreme decarburization was observed. Average surface temperature and average particle velocity were measured in selected spraying runs along the main part of the particle path in the plasma stream. Information on structure of sprayed cast iron powder as compared with feedstock powder was obtained by Mössbauer spectroscopy. To maintain the cast iron properties, as large particle size and high feed rate as possible are necessary. Based on experimental results Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2011
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