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Relationship Between Crystalline Structure and Hardness of Ti-Si-N-O Coatings Fabricated by dc Sputtering

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Abstract

Ti-Si-N-O coatings were deposited on AISI D2 tool steel and silicon substrates by dc reactive magnetron co-sputtering using a target of Ti-Si with a constant area ratio of 0.2. The substrate temperature was 400 °C and reactive atmosphere of nitrogen and argon. For all samples, argon flow was maintained constant at 25 sccm, while the flow of the nitrogen was varied to analyze the structural changes related to chemical composition and resistivity. According to results obtained by x-ray diffraction and stoichiometry calculations by x-ray energy dispersive spectroscopy the Ti-Si-N-O coatings contain two solid solutions. The higher crystalline part corresponds to titanium oxynitrure. Hardness tests on the coatings were carried out using the indentation work model and the hardness value was determined. Finally, the values of hardness were corroborated by nanoindentation test, and values of Young’s modulus and elastic recovery were discussed. We concluded that F2TSN sample (FAr = 25 sccm, FN = 5 sccm, P = 200 W, and PW = 8.9 × 10−3 mbar) presented the greatest hardness and the lowest resistivity values, due to its preferential crystalline orientation.

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Acknowledgments

This work was supported by CONACYT by means of the project 58653. Authors gratefully acknowledge Pedro García Jiménez and José Eleazar Urbina Álvarez at CINVESTAV Unidad Querétaro, as well as, Marcela Guerrero and Ana B. Soto at Departamento de Física - CINVESTAV, for their technical assistance.

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Authors and Affiliations

  1. Centro de Investigación en Micro y Nanotecnología, Universidad Veracruzana, Boca del Rio, Veracruz, Mexico

    Leandro García-González, Claudia Mendoza-Barrera, Pedro J. García-Ramírez, Jaime Martínez-Castillo, Ángel Sauceda & Agustin L. Herrera-May

  2. Universidad del Papaloapan, Campus Loma Bonita, Loma Bonita, Oaxaca, Mexico

    Julián Hernández-Torres

  3. Departamento de Física, Centro de Investigación y de Estudios Avanzados del IPN, Mexico DF, Mexico

    Miguel Meléndez-Lira

  4. Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Queretaro, Mexico

    Juan Muñoz Saldaña & Francisco J. Espinoza-Beltrán

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  1. Leandro García-González
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  2. Julián Hernández-Torres
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  3. Claudia Mendoza-Barrera
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  4. Miguel Meléndez-Lira
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  5. Pedro J. García-Ramírez
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  6. Jaime Martínez-Castillo
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  7. Ángel Sauceda
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  8. Agustin L. Herrera-May
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  9. Juan Muñoz Saldaña
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  10. Francisco J. Espinoza-Beltrán
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Correspondence to Leandro García-González.

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García-González, L., Hernández-Torres, J., Mendoza-Barrera, C. et al. Relationship Between Crystalline Structure and Hardness of Ti-Si-N-O Coatings Fabricated by dc Sputtering. J. of Materi Eng and Perform 17, 580–585 (2008). https://doi.org/10.1007/s11665-007-9141-0

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  • DOI: https://doi.org/10.1007/s11665-007-9141-0

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