Comparative tribological and adhesion studies of some titanium-based ceramic coatings

Helena Ronkainen, Kenneth Holmberg, Kevin Fancey, Allan Matthews, Bernd Matthes, Erhard Broszeit

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    In this work different evaluation methods for thin hard coatings were studied in three laboratories. Different coatings and test equipment were used. An agreement on the procedure for testing and data appraisal was made.
    The results obtained in the different laboratories varied depending on the test procedure used.
    Two test methods, ball crater and scratch test, yielded smaller variations in the results, whereas the hardness measurements and pin-on-disc tests had larger variations, although in the former case these were within the standard deviations of the readings.

    It is clear from this work that tests performed in different laboratories cannot be used for comparison purposes, unless strict agreement is reached on the exact test procedure and on the basis of interpretation of the results.
    Even tests carried out under nominally identical conditions in one laboratory can in some cases give a spread in performance, since many variables, such as friction coefficient, wear rate and hardness, are not intrinsic materials properties and can statistically vary.
    It is thus important to devise standardized test methods, and in all cases to quote the standard deviations on data.
    Original languageEnglish
    Pages (from-to)888-897
    JournalSurface and Coatings Technology
    Volume43-44
    Issue numberPart 2
    DOIs
    Publication statusPublished - 1990
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    ceramic coatings
    Ceramic coatings
    Titanium
    adhesion
    Adhesion
    titanium
    Hardness
    Hard coatings
    Materials properties
    standard deviation
    Wear of materials
    hardness
    Friction
    Coatings
    coatings
    Testing
    test equipment
    craters
    coefficient of friction
    balls

    Cite this

    Ronkainen, Helena ; Holmberg, Kenneth ; Fancey, Kevin ; Matthews, Allan ; Matthes, Bernd ; Broszeit, Erhard. / Comparative tribological and adhesion studies of some titanium-based ceramic coatings. In: Surface and Coatings Technology. 1990 ; Vol. 43-44, No. Part 2. pp. 888-897.
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    abstract = "In this work different evaluation methods for thin hard coatings were studied in three laboratories. Different coatings and test equipment were used. An agreement on the procedure for testing and data appraisal was made. The results obtained in the different laboratories varied depending on the test procedure used. Two test methods, ball crater and scratch test, yielded smaller variations in the results, whereas the hardness measurements and pin-on-disc tests had larger variations, although in the former case these were within the standard deviations of the readings.It is clear from this work that tests performed in different laboratories cannot be used for comparison purposes, unless strict agreement is reached on the exact test procedure and on the basis of interpretation of the results. Even tests carried out under nominally identical conditions in one laboratory can in some cases give a spread in performance, since many variables, such as friction coefficient, wear rate and hardness, are not intrinsic materials properties and can statistically vary. It is thus important to devise standardized test methods, and in all cases to quote the standard deviations on data.",
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    Comparative tribological and adhesion studies of some titanium-based ceramic coatings. / Ronkainen, Helena; Holmberg, Kenneth; Fancey, Kevin; Matthews, Allan; Matthes, Bernd; Broszeit, Erhard.

    In: Surface and Coatings Technology, Vol. 43-44, No. Part 2, 1990, p. 888-897.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Ronkainen, Helena

    AU - Holmberg, Kenneth

    AU - Fancey, Kevin

    AU - Matthews, Allan

    AU - Matthes, Bernd

    AU - Broszeit, Erhard

    N1 - Project code: KOT6045

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    AB - In this work different evaluation methods for thin hard coatings were studied in three laboratories. Different coatings and test equipment were used. An agreement on the procedure for testing and data appraisal was made. The results obtained in the different laboratories varied depending on the test procedure used. Two test methods, ball crater and scratch test, yielded smaller variations in the results, whereas the hardness measurements and pin-on-disc tests had larger variations, although in the former case these were within the standard deviations of the readings.It is clear from this work that tests performed in different laboratories cannot be used for comparison purposes, unless strict agreement is reached on the exact test procedure and on the basis of interpretation of the results. Even tests carried out under nominally identical conditions in one laboratory can in some cases give a spread in performance, since many variables, such as friction coefficient, wear rate and hardness, are not intrinsic materials properties and can statistically vary. It is thus important to devise standardized test methods, and in all cases to quote the standard deviations on data.

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    JO - Surface and Coatings Technology

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