Abstract
There are a number of process parameters which affect the characteristics of metal powders produced by free fall gas atomization. In the following work effects of various process parameters like apex angle of atomizer, focal length of atomizer, number of nozzles, diameter of nozzles, diameter of liquid metal delivery tube, superheat of liquid metal and type of metal etc. were studied on their surface morphology. It was observed that shape of powder particles depends on apex angle, superheat of liquid metal, type of metal and particle size range within a powder collective. Other parameters like focal length of atomizer, number of nozzles, diameter of nozzles and diameter of liquid metal delivery tube were found to have no effect on the shape of powder particles. However, Surface porosity and solidification shrinkage were observed on almost all types of metal powders.
Similar content being viewed by others
References
D. SINGH, S. C. KORIA and R. K. DUBE, Powder Metall. 42 (1) (1999) 79.
S. A. MOIR and H. JONES, Mater. Sci. Eng. A 173 (1993) 161.
S. A. MOIR, H. JONES and S. B. M. BECK, Powder Metall. 39 (4) (1996) 271.
D. SINGH, S. C. KORIA and R. K. DUBE, ISIJ Int. 43 (12) (2003) 2067.
G. HELMERSSON and KLAAS BURGDORF, Scandinavian, J. Met. 25 (1996) 51.
Y. LIU, K. MINAGAWA, H. KAKISAWA and K. HALADA, Int. J. Powder Metall. 39 (2) (2003) 29.
S. OZBILEN, A. UNAL and T. SHEPPARD, Powder Metall. 34 (1) (1991), 53.
G. HELMERSSON, A. HEDE, T. JOHANNESSON, B. BERGMAN and H. HALLEN, Scandinavian, J. Met. 26 (1997) 93.
A. UNAL, Metall. Trans.B. 20B (2) (1989) 61.
A. UNAL, Powder Metall. 33 (1) (1990) 53.
S. OZBILEN, A. UNAL and T. SHEPPARD, Powder Metall. 39 (1) (1996) 44.
J. B. SEE and G. H. JOHNSTON, Powder Technol. 21 (1978) 119.
A. LAWLEY, in “Atomization: The production of metal powders” (MPIF, Princeton, NJ, 1992) p. 83.
O. S. NICHIPORENKO and YU. NAIDA, Sov. Powder Metall. Met. Ceram. 7 (67) (1968) 509.
E. KLAR, in Metals Handbook, vol 7 (Powder Metallurgy, 1984) p. 75.
E.G. MIRAVETE and E. J. LAVERNIA, in Physical Chemistry of Powder Metals Production and Processing edited by W. MURRAY SMALL, (Minerals metals and Materials Society, 1989) p. 175.
D. CHENG, Q. XU, G. TRAPAGA and E. J. LAVERAIA, Metall. Mater. Trans. B. 32B (6) (2001) 525.
Z. LIU, Powder Metall. 45 (2) (2002) 134.
N. H. PRYDS and A. S. PEDERSEN, Metall. Mater. Trans. A. 33A (12) (2002) 3755.
D. SINGH, S. C. KORIA and R. K. DUBE, Powder Metall. 44, (2) (2001) 177.
S. OZBILEN, Powder Metall. 43 (2) (2000) 173.
S. OZBILEN, Powder Technol. 102 (1998) 109.
S. OZBISLEN, Powder Metall. 42 (1) (1999) 70.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Singh, D., Dangwal, S. Effects of process parameters on surface morphology of metal powders produced by free fall gas atomization. J Mater Sci 41, 3853–3860 (2006). https://doi.org/10.1007/s10853-006-6652-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-006-6652-2