Microstructural changes in DLC films due to tribological contact

Jari Koskinen; D. Schneider; Helena Ronkainen; Tatu Muukkonen; Simo Varjus; P. Burck; Kenneth Holmberg; Hans-Joachim Scheibe

doi:10.1016/S0257-8972(98)00656-2

Microstructural changes in DLC films due to tribological contact

Jari Koskinen (Corresponding Author), D. Schneider, Helena Ronkainen, Tatu Muukkonen, Simo Varjus, P. Burck, Kenneth Holmberg, Hans-Joachim Scheibe

Fraunhofer Institute for Mechanics of Materials (IWM)

Research output: Contribution to journal › Article › Scientific › peer-review

23 Citations (Scopus)

Abstract

The hydrogenated (a-C:H) and hydrogen free (ta-C) films were tested in sliding wear tests. The tests were carried out in air at room temperature (RH 15±5%). The coefficient of friction in the tests was in the range 0.03–0.12 for the a-C:H films and 0.17–0.28 for the ta-C films. The wear volume of the DLC films was sufficiently low to enable the direct comparison of the film properties of the worn film to the original film. The microstructure of the films after wear tests has been characterized by micro RAMAN, the mechanical properties were measured by nano indentation and the elastic modulus was measured with the laser-acoustic method. No change of the micro structure of the DLC films was observed. The observed reduction of the elastic modulus of the ta-C film is explained by the evolution of mechanical defects such as micro-cracks and cracking at the nodular defects typical in non filtered vacuum arc depositions

Original language	English
Pages (from-to)	385-390
Journal	Surface and Coatings Technology
Volume	108-109
DOIs	https://doi.org/10.1016/S0257-8972(98)00656-2
Publication status	Published - 1998
MoE publication type	A1 Journal article-refereed

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title = "Microstructural changes in DLC films due to tribological contact",

abstract = "The hydrogenated (a-C:H) and hydrogen free (ta-C) films were tested in sliding wear tests. The tests were carried out in air at room temperature (RH 15±5%). The coefficient of friction in the tests was in the range 0.03–0.12 for the a-C:H films and 0.17–0.28 for the ta-C films. The wear volume of the DLC films was sufficiently low to enable the direct comparison of the film properties of the worn film to the original film. The microstructure of the films after wear tests has been characterized by micro RAMAN, the mechanical properties were measured by nano indentation and the elastic modulus was measured with the laser-acoustic method. No change of the micro structure of the DLC films was observed. The observed reduction of the elastic modulus of the ta-C film is explained by the evolution of mechanical defects such as micro-cracks and cracking at the nodular defects typical in non filtered vacuum arc depositions",

author = "Jari Koskinen and D. Schneider and Helena Ronkainen and Tatu Muukkonen and Simo Varjus and P. Burck and Kenneth Holmberg and Hans-Joachim Scheibe",

year = "1998",

doi = "10.1016/S0257-8972(98)00656-2",

language = "English",

volume = "108-109",

pages = "385--390",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

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TY - JOUR

T1 - Microstructural changes in DLC films due to tribological contact

AU - Koskinen, Jari

AU - Schneider, D.

AU - Ronkainen, Helena

AU - Muukkonen, Tatu

AU - Varjus, Simo

AU - Burck, P.

AU - Holmberg, Kenneth

AU - Scheibe, Hans-Joachim

PY - 1998

Y1 - 1998

N2 - The hydrogenated (a-C:H) and hydrogen free (ta-C) films were tested in sliding wear tests. The tests were carried out in air at room temperature (RH 15±5%). The coefficient of friction in the tests was in the range 0.03–0.12 for the a-C:H films and 0.17–0.28 for the ta-C films. The wear volume of the DLC films was sufficiently low to enable the direct comparison of the film properties of the worn film to the original film. The microstructure of the films after wear tests has been characterized by micro RAMAN, the mechanical properties were measured by nano indentation and the elastic modulus was measured with the laser-acoustic method. No change of the micro structure of the DLC films was observed. The observed reduction of the elastic modulus of the ta-C film is explained by the evolution of mechanical defects such as micro-cracks and cracking at the nodular defects typical in non filtered vacuum arc depositions

AB - The hydrogenated (a-C:H) and hydrogen free (ta-C) films were tested in sliding wear tests. The tests were carried out in air at room temperature (RH 15±5%). The coefficient of friction in the tests was in the range 0.03–0.12 for the a-C:H films and 0.17–0.28 for the ta-C films. The wear volume of the DLC films was sufficiently low to enable the direct comparison of the film properties of the worn film to the original film. The microstructure of the films after wear tests has been characterized by micro RAMAN, the mechanical properties were measured by nano indentation and the elastic modulus was measured with the laser-acoustic method. No change of the micro structure of the DLC films was observed. The observed reduction of the elastic modulus of the ta-C film is explained by the evolution of mechanical defects such as micro-cracks and cracking at the nodular defects typical in non filtered vacuum arc depositions

U2 - 10.1016/S0257-8972(98)00656-2

DO - 10.1016/S0257-8972(98)00656-2

M3 - Article

SN - 0257-8972

VL - 108-109

SP - 385

EP - 390

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Microstructural changes in DLC films due to tribological contact

Abstract

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