Analysis of powder particles of high carbon cast iron after air plasma spraying

0341008 - ÚFM 2010 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Schneeweiss, Oldřich - Voleník, Karel
Analysis of powder particles of high carbon cast iron after air plasma spraying.
ISIAME 2008. New York: Springer, 2009 - (Kuzmann, E.; Lazar, K.), s. 39-44. ISBN 978-3-642-01369-0.
[International Symposium on the Industrial Applications of the Mossbauer Effect (ISIAME 2008) /7./. Budapest (HU), 17.08.2008-22.08.2008]
Grant CEP: GA AV ČR IAA1041404
Výzkumný záměr: CEZ:AV0Z20410507; CEZ:AV0Z20430508
Klíčová slova: Plasma spraying * Oxidation * Mössbauer spectroscopy ·
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Structure and phase analysis of high carbon cast iron prepared by plasma spraying was performed using X-ray diffraction and Mössbauer spectroscopy. The sprayed powder particles were trapped in liquid nitrogen to fix their composition during the flight from the plasma torch. The results show decarburization and oxidation of the powder. The carbon content decrease is more pronounced on surfaces of the particles. The fresh powder exhibits an anomalous magnetic transition from ferromagnetic to paramagnetic state during the sample cooling from room temperature down to 28 K. This effect was explained as result of high concentration of defects and strains. The long time ageing at room temperature caused transition to more stable phase composition and diminishing of the anomalous magnetic transition.
Trvalý link: http://hdl.handle.net/11104/0184124