Composition changes of cast iron particles due to reactions in a plasma stream

Kód výsledku v IS VaVaI

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Nalezeny alternativní kódy

RIV/68081723:_____/10:00352819

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Composition changes of cast iron particles due to reactions in a plasma stream

Popis výsledku v původním jazyce

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 ofcast 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 ironpowder 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

Název v anglickém jazyce

Composition changes of cast iron particles due to reactions in a plasma stream

Popis výsledku anglicky

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 ofcast 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 ironpowder 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

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F08%2F1240" target="_blank" >GA106/08/1240: Fyzikální vlastnosti plazmaticky nanášených vysokotavitelných materiálů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

World PM2010 Proceedings: Powder Manufacturing and Processing; Miniaturization and Nanotechnology; Powder Pressing

ISBN

1899072101

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

European Powder Metallurgy Association

Místo vydání

Shrewsbury

Místo konání akce

Florencie

Datum konání akce

10. 10. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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