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G. Shanmugavelayutham,V. Selvarajan,P.V.A. Padmanabhan,K.P. Sreekumar,N.K. Joshi 한국물리학회 2007 Current Applied Physics Vol.7 No.2
A DC non-transferred mode plasma spray torch was fabricated for plasma spheroidization. The eect of powder-carrier gas and pow-der loading on the temperature of the plasma jet generated by the torch has been studied. The experiment was done at dierent inputparticles in the size range from 40 to 100l m were processed. The temperature of the jet was estimated after owing powder-carrier gasonly into the plasma jet and with powder-carrier gas feeding powder into the ame. On introduction of powder-carrier gas and powderloading the temperature of the jet was found to decrease appreciably down to 11%. The temperature of the plasma jet was estimatedusing the Atomic Boltzmann plot method.
In-flight particle behaviour and its effect on co-spraying of alumina?titania
G. Shanmugavelayutham,V. Selvarajan,T.K. Thiyagarajan,P.V.A. Padmanabhan,K.P. Sreekumar,R.U. Satpute Y. Zhai 한국물리학회 2006 Current Applied Physics Vol.6 No.1
The present paper investigate and illustrate the importance of plasmaparticle interaction in controlling the plasma spray processwhile spraying aluminatitania powder blend. Plasma sprayed coatings of aluminatitania (6040l m) have been prepared at dier-chemical composition of aluminatitania coatings, prepared at low input power, is signicantly dierent from that of the feed stockpowder. Coating composition progressively approaches that of the feedstock powder at higher power inputs. Experimental resultsare explained in terms of the in-ight behaviour of alumina and titania particles in the plasma jet using a one-dimensional model topredict the thermal state of the particles. In particular, the eect of particle size and input power are considered in this study.