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Characterization of CoCrMo alloy fabricated by sintering for biomedical materials

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Abstract

The sintering kinetics of CoCrMo powders is investigated by dilatometry. Pre-alloyed spherical powders were pressed and then sintered between 1300 and 1375 °C. SEM images coupled to an EDS analysis are used to assess the microstructure of sintered samples. Microhardness of the sintered samples was also evaluated. Densification is carried out in both solid and semi-solid states. The final densification is dominated by the appearance of liquid which fills the remaining pores. The diffusion mechanism dominant are volume diffusion and viscous flux diffusion for the intermediate and last stage of sintering. Microhardness increased as the temperature did it too. Intermetallic compounds formed due to the liquid reaction was determined to be reach in molybdenum. The increment in hardness is attributed to the densification and stresses generated by the solidification of eutectic liquid. It is concluded that higher mechanical properties are obtained when sintering is performed at 1375 °C.

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The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

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Acknowledgments

The authors would like to thank to the Coordinación de la Investigación Científica (CIC) of the UMSNH.

Funding

This research was supported by [the National Council of Humanities, Science and Technology CONAHCYT via postdoctoral stage of J.L. Cabezas-Villa [CVU 511121] and the doctoral fellowship of A. M. Garcia-Carrillo [CVU 1008033].

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Authors and Affiliations

  1. Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico

    J. Lemus-Ruiz, A. M. Garcia-Carrillo & J. L. Cabezas-Villa

  2. Instituto de Investigaciones en Ciencias de la Tierra, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico

    L. Olmos

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  1. J. Lemus-Ruiz
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  2. A. M. Garcia-Carrillo
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  3. J. L. Cabezas-Villa
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Contributions

L-R: Writing—review & editing, Formal analysis. AMG-C: Investigation; Writing—original draft, Experimental set up. LO: Conceptualization; Project administration, Writing—original draft. JLC-V: Supervision; Experimental set up; Validation.

Corresponding author

Correspondence to A. M. Garcia-Carrillo.

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Lemus-Ruiz, J., Garcia-Carrillo, A.M., Cabezas-Villa, J.L. et al. Characterization of CoCrMo alloy fabricated by sintering for biomedical materials. MRS Advances 8, 1107–1111 (2023). https://doi.org/10.1557/s43580-023-00691-2

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