Characterization of CoTi Intermetallic Materials Produced by Electric Current Activated Sintering

• Authors: N. Ergin , O. Ozdemir
• Languages of publication: EN

Abstracts

EN

In the present work, the characterization and production of CoTi intermetallic materials produced by electric current activated sintering under 300 MPa uniaxial pressure in open air at 2000 A for 6 min was investigated. Cobalt powder with 10 μm size and titanium powder < 40 μm size having 99.9% and 99.5% purity, respectively, were used. The elemental powders were mixed in the stoichiometric ratio corresponding to the CoTi intermetallic, in a molar proportion of 1:1. Scanning electron microscopy and X-ray diffraction analysis were used to characterize produced samples. In microstructural examinations it was found that the sample has multi-phase microstructure. X-ray diffraction studies revealed that the phases are CoTi, CoTi_2, TiCo_2, and CoTiO_3. The relative density of test materials measured according to Archimedes' principle was 87.6%, and the microhardness of materials was about 646.74 HV_{0.1}.

Keywords

EN

81.20.Ev; 81.40.Pq

Discipline

• 81.40.Pq: Friction, lubrication, and wear
• 81.20.Ev: Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 2
• Pages: 399-401

Dates

published

2014-02

Contributors

author

N. Ergin

• Sakarya University, Technology Faculty, Department of Metallurgy and Materials Engineering, Esentepe Campus, 54187, Sakarya, Turkey

author

O. Ozdemir

• Sakarya University, Technology Faculty, Department of Metallurgy and Materials Engineering, Esentepe Campus, 54187, Sakarya, Turkey

References

• 1. C. Sierra, A.J. Vazquez, doi: 10.1016/j.intermet.2005.12.005, Intermetallics 14, 848 (2006)
• 2. C.L. Yeh, C.C. Yeh, doi: 10.1016/j.jallcom.2005.01.013, J. Alloys Comp. 396, 228 (2005)
• 3. R.P. Mulay, S.R. Agnew, doi: 10.1016/j.actamat.2011.11.061, Acta Mater. 60, 1784 (2012)
• 4. M. Wittmann, I. Baker, doi: 10.1016/S0921-5093(01)01571-4, Mater. Sci. Eng. A 329-331, 206 (2002)
• 5. Y. Kaneno, T. Takasugi, doi: 10.1016/S0921-5093(00)01833-5, Mater. Sci. Eng. A 302, 215 (2001)
• 6. A. Molladavoudi, S. Amirkhanlou, M. Shamanian, F. Ashrafizadeh, doi: 10.1016/j.matlet.2012.04.104, Mater. Lett. 81, 254 (2012)
• 7. N. Ergin, G. Yoruk, O. Ozdemir, doi: 10.12693/APhysPolA.123.245, Acta Phys. Pol. A 123, 245 (2013)
• 8. J. Rodriguez, S.O. Moussa, J. Wall, K. Morsi, doi: 10.1016/S1359-6462(02)00553-5, Scr. Mater. 48, 707 (2003)
• 9. R. Orru, R. Licheri, A.M. Locci, A.G. Cincotti, doi: 10.1016/j.mser.2008.09.003, Mater. Sci. Eng. R 63, 127 (2009)
• 10. J. Liu, Y. Yang, K. Feng, D. Lu, doi: 10.1016/j.jallcom.2008.09.066, J. Alloys Comp. 476, 207 (2009)

Identifiers

DOI

10.12693/APhysPolA.125.399