Abstract
It is well known that carbonyl iron powders behave differently during sintering in comparison to commercially available electrolytic and reduced iron powders. This investigation of the sintering of carbonyl and other iron powders in the alpha and gamma range of iron has shown that the rate of densification and the sintered density of carbonyl iron powder is considerably greater than that of the two other types of iron powder. This is also true with respect to the actual values of strength and elongation. The changes in grain structure of carbonyl iron powder during sintering up to 2000°F are shown. Attempts have been made to explain the sintering behavior of carbonyl iron powder by the difference in the correlation between surface and volume diffusion and also between grain boundary and volume diffusion, which correlation differs from those for the larger electrolytic and reduced iron powders.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Libsch, J., R. Volterra, and John Wulff, “The Sintering of Iron Powder,” in: John Wulff (ed.), Powder Metallurgy, American Society for Metals, Novelty, Ohio.
Schlecht, L., W. Schubardt, and F. Duftschmid, “Sintering of Powdered Iron by Heat and Pressure Treatment,” Z. Elektrochem. 37: 485 (1931).
Forss, S. Lennart, “Raw Materials and Properties in Ferrous Powder Metallurgy,” ASM Technical Report No. 14.4.
Cizeron, G., “Influence of Grain Size on the Kinetics of Contraction of Agglomerates of Ex-Carbonyl Iron during Roasting in the Alpha Phase,” Compt. Rend. 245: 2051–2054 (1957).
Cizeron, G., “Influence of Double Compaction on the Kinetics of Sintering of Agglomerates of Carbonyl Iron,” Compt. Rend. 246: 3060–3063 (1958).
Cizeron, G., and P. Lacombe, “A Dilatometric Study of the Isothermal Sintering of Carbonyl Iron Powder,” Compt. Rend. 240: 427–429 (1955).
Cizeron, G., and P. Lacombe, “Einfluss der Erhitzung von Presslingen aus carbonyleisen Pulver auf Temperaturen unter und ueber der A-3-Temperatur auf den Sinter-Vorgang,” Rev. Met. 53: 819–830 (1956).
Cizeron, G., and P. Lacombe, “Role of Grain Boundaries and the α → γ Allotropic Transformation of Iron in the Elimination of Pores During Sintering of Carbonyl Iron,” Compt. Rend. 241(4): 409–411(1955).
Cizeron, G., and P. Lacombe, “Influence of Self Diffusion Effects in Powder Metallurgy Above and Below the Transformation Point A-3 of Pure Iron, Made from Carbonyl,” Rev. Met. 52: 771–784 (1955) [English summary].
Cizeron, G., and P. Lacombe, “Microscopic and X-Ray Examination of Shrinkage Caused by the Sintering Process,” Stahl Eisen 79: 1366–1370 (1959).
Fischmeister, H. F., “Densification and Grain Growth in the Later Stages of Sintering of Alpha Iron,” Jernkontoret Laboratory for Powder Metallurgy at the Swedish Institute for Metal Research, Stockholm Ö, Sweden. Private communication, 1965.
Jenkins, Ivor, “Some Aspects of Residual Porosity in Powder Metallurgy,” Powder Met. 7(13): 68–93 (1964).
Zapf, C., “The Pressing and Sintering Properties of Iron Powders,” Powder Met. 7: 218 (1961).
Kuczynski, G. C., “Self-Diffusion in Sintering of Metallic Particles,” Trans. AIME 185: 169–178 (1949).
Cizeron, G., and P. Lacombe, “Microscopic and X-Ray Examination of Shrinkage Caused by the Sintering Process,” Stahl Eisen 79: 1366–1370 (1959).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1966 Springer Science+Business Media New York
About this chapter
Cite this chapter
Poster, A.R., Hausner, H.H. (1966). Alpha and Gamma Phase Sintering of Carbonyl and Other Iron Powders. In: Hausner, H.H. (eds) Modern Developments in Powder Metallurgy. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7882-2_3
Download citation
DOI: https://doi.org/10.1007/978-1-4684-7882-2_3
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-7884-6
Online ISBN: 978-1-4684-7882-2
eBook Packages: Springer Book Archive