Low friction coefficient coatings Ni-Cr by magnetron sputtering, DC

Authors

  • Jorge Morales-Hernández Centro de Investigación y Desarrollo Tecnológico en Electroquímica
  • Araceli Mandujano-Ruíz Centro de Investigación y Desarrollo Tecnológico en Electroquímica
  • Julieta Torres-González Centro de Investigación y Desarrollo Tecnológico en Electroquímica
  • Francisco J. Espinoza-Beltrán Centro de Investigación y de Estudios Avanzados del IPN (Unidad Querétaro)
  • Héctor Herrera-Hernández Universidad Autónoma del Estado de México

DOI:

https://doi.org/10.3989/revmetalm.047

Keywords:

Mechanical alloying (MA), Magnetron sputtering, Ni-Cr coatings

Abstract


Magnetron Sputter Deposition technique with DC was used for the deposition of Ni-Cr coatings on AISI 316 SS like substrate. The cathode with a nominal composition Ni-22 at% Cr was prepared by Mechanical Alloying (MA) technique, with a maximum milling time of 16 hours and, with a high energy SPEX 8000 mill. The coatings were made under Argon atmosphere at room temperature with a power of 100 W at different times of growth. Chemical composition, microstructure, topography, nanohardness and wear of the coatings were evaluated using the techniques of microanalysis by energy dispersive X-ray analyzer (EDAX), X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), Nano-indentation and pin-on-Disk, respectively. After milling, was not detected contamination in the mixtures. XRD analysis revealed that the microstructure of the Ni-Cr alloy was maintained in the coatings with respect to MA powders, with some degree of recrystallization. Nanohardness values were in the order of 8.8 GPa with a Young’s modulus of 195 GPa. The adhesion of the films was evaluated according to their resistance to fracture when these were indented at different loads using Vickers microhardness. The wear test results showed a decrease in the friction coefficient with respect to the increase of thickness’ films, getting a minimum value of 0.08 with a thickness of 1 μm and which correspond with the maximum growing time.

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Published

2015-09-30

How to Cite

Morales-Hernández, J., Mandujano-Ruíz, A., Torres-González, J., Espinoza-Beltrán, F. J., & Herrera-Hernández, H. (2015). Low friction coefficient coatings Ni-Cr by magnetron sputtering, DC. Revista De Metalurgia, 51(3), e047. https://doi.org/10.3989/revmetalm.047

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