Sintering Studies and Microstructural Evolution of Fe-MoS₂ Mixtures

Abstract:

The development of dry self-lubricating materials is directly linked to the rising requirements of performance. Iron and steel are the most used metals around the world and molybdenum disulfide (MoS₂) one of the most used solid lubricant. Therefore it is expected that one might try to develop self-lubricating steels containing MoS₂, however MoS₂ reacts with steel matrices during sintering. This work has focused on the study of these reactions; temperatures at which this occurs; the influence of particle sizes and MoS₂ content and also MoS₂ influence during processing and in the parts properties. The results showed that the reaction occurs at lower temperatures than the predicted and the products are iron-molybdenum and iron sulfides. The sintering studies revealed that MoS₂ enhances sintering and the particle size and MoS₂ content directly influenced the morphology and chemical composition of the resulting phases.

• Periodical: Materials Science Forum (Volume 802)
• Pages: 415-420
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.802.415
• Online since: December 2014
• Authors: Kaline Pagnan Furlan, Julia Zimmermann de Assunção, Gustavo Paz, Cristiano Binder, Aloisio Nelmo Klein
• Keywords: MoS₂, Powder metallurgy, Self-Lubricating Materials, Sintering, Solid Lubricants

References

[1] C. Busch: Solid Lubrication. In: Lubricants and Lubrication. (Ed. 2nd. Weinheim: Wiley-Vch, 2007).

[2] B. Sustarsic, L. Kosec, S. Dolinsek and B. Podgornik: J. Mater. Process. Technol. (2003), p.98.

[3] S. Raadnui, S. Mahathanabodee and R. Tongsri: Wear Vol. 265 (3-4) (2008), pp.546-553.

DOI: 10.1016/j.wear.2007.11.014

[4] S. Dhanasekaran and R. Gnanamoorthy: Journal of Materials Science Vol. 42 (12) (2007), p.4659.

[5] M. Chandrasekaran and P. Singh: Wear Vol. 206 (1-2) (1997), p.1.

[6] S. Dhanasekaran and R. Gnanamoorthy: Materials & Design Vol. 28 (4) (2007), p.1135.

[7] ASM I.H.C. Alloy Phase Diagrams. (3rd ed. Materials Park OH: American Society for Metals 1992).

[8] S. Howard: Ellingham Diagrams. Disponível em: http: /showard. sdsmt. edu/MET320/. Acesso em: 27/10/(2012).

[9] V.S. Ageeva, L.I. Pugina and V.N. Paderno: Soviet Powder Metallurgy and Metal Ceramics Vol. 23 (1) (1984), p.30.

DOI: 10.1007/bf00792484

[10] I.F. Kononyuk. Diffusion of sulfur in iron (k voprosu o diffuzii sery v zheleze). Fiz. Metal. I Metalloved. (USSR, Translated version at NASA library). Vol. 19 (1965), p.311.

[11] V.V. Mural and A.P. Fokin: Metal Science and Heat Treatment Vol. 20 (6) (1978), p.501.

[12] S. Mrowec and K. Przybylski: Oxidation of Metals. Vol. 23 (3-4) (1985), pp.107-139.

[13] A.R. Lansdown. Molybdenum Disulphide Lubrication. (In: Tribology Series 35. Ed. UK: Elsevier, 1999).

[14] R.M. German. Sintering Theory and Practice. (John Wiley & Sons New York, 1996).

[15] R.F. Decker: Metallurgical Transactions Vol. 4 (11) (1973), p.2495.