TiBC coatings with different phase compositions (nanocrystalline TiBxCy or TiB2 phases mixed or not with amorphous carbon, a-C) were prepared by magnetron sputtering. These coatings were comparatively studied in terms of phase stability after thermal annealing at 250, 500, 750, and 1000 °C in argon using Raman and x-ray absorption near-edge spectroscopy techniques. The main differences were observed at temperatures above 500 °C when oxidation processes occur and the mechanical properties deteriorate. At 1000 °C, the samples were fully oxidized forming a-C, TiO2, and B2O3 as final products. Higher hardness and reduced indentation modulus values and better tribological properties were observed at 750 °C for nanocomposite structures including amorphous carbon and ternary TiBxCy phases. This behavior is attributed to a protective effect associated with the a-C phase which is achieved by the encapsulation of the nanocrystals in the coating and the better hard/lubricant phase ratio associated with this type of coating.
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March 2014
Research Article|
January 15 2014
Mechanical and phase stability of TiBC coatings up to 1000 °C
Manuel D. Abad;
Manuel D. Abad
a)
Department of Mechanical Engineering, McMaster University
, 1280 Main Street West, Hamilton, L8S 4L7 Ontario, Canada
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Stephen C. Veldhuis;
Stephen C. Veldhuis
Department of Mechanical Engineering, McMaster University
, 1280 Main Street West, Hamilton, L8S 4L7 Ontario, Canada
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Jose L. Endrino;
Jose L. Endrino
Abengoa Research S. L., Abengoa, Campus Palmas Altas
, C/ Energía Solar 1, 41014 Seville, Spain
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Ben D. Beake;
Ben D. Beake
Micro Materials Ltd.
, Willow House, Yale Business Village, Ellice Way, Wrexham LL13 7YL, United Kingdom
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Alberto García-Luis;
Alberto García-Luis
TECNALIA
, Mikeletegui Pasealekua 2, 20009 Donostia-San Sebastián, Spain
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Marta Brizuela;
Marta Brizuela
TECNALIA
, Mikeletegui Pasealekua 2, 20009 Donostia-San Sebastián, Spain
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Juan C. Sánchez-López
Juan C. Sánchez-López
b)
Instituto de Ciencia de Materiales de Sevilla (CSIC-US)
, Avda. Américo Vespucio 49, 41092-Sevilla, Spain
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Manuel D. Abad
a)
Stephen C. Veldhuis
Jose L. Endrino
Ben D. Beake
Alberto García-Luis
Marta Brizuela
Juan C. Sánchez-López
b)
Department of Mechanical Engineering, McMaster University
, 1280 Main Street West, Hamilton, L8S 4L7 Ontario, Canada
a)
Current address: Department of Nuclear Engineering. University of California – Berkeley, Etcheverry Hall, 2521 Hearst Avenue, Berkeley, California 94720-1731. Electronic address: [email protected]
b)
Electronic address: [email protected]
J. Vac. Sci. Technol. A 32, 021508 (2014)
Article history
Received:
October 17 2013
Accepted:
December 23 2013
Citation
Manuel D. Abad, Stephen C. Veldhuis, Jose L. Endrino, Ben D. Beake, Alberto García-Luis, Marta Brizuela, Juan C. Sánchez-López; Mechanical and phase stability of TiBC coatings up to 1000 °C. J. Vac. Sci. Technol. A 1 March 2014; 32 (2): 021508. https://doi.org/10.1116/1.4861365
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