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Composition changes of cast iron particles due to reactions in a plasma stream
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SYSNO ASEP 0352819 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Composition changes of cast iron particles due to reactions in a plasma stream Author(s) 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) RIDSource Title World PM2010 Proceedings: Powder Manufacturing and Processing; Miniaturization and Nanotechnology; Powder Pressing, 1. - Shrewsbury : European Powder Metallurgy Association, 2010 - ISBN 1899072101 Pages s. 143-150 Number of pages 8 s. Action Powder Metallurgy World Congress & Exhibition – PM2010 Event date 10.10.2010-14.10.2010 VEvent location Florencie Country IT - Italy Event type WRD Language eng - English Country GB - United Kingdom Keywords Cast Iron ; Plasma Spraying ; Decarburization ; Oxidation Subject RIV JG - Metallurgy R&D Projects GA106/08/1240 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20430508 - UFP-V (2005-2011) AV0Z20410507 - UFM-A (2005-2011) Annotation 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 Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2011
Number of the records: 1