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Tribological studies on PVD/HVOF duplex coatings on Ti6Al4V substrate

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Title: Tribological studies on PVD/HVOF duplex coatings on Ti6Al4V substrate
Authors: Bemporad, E.1 e.bemporad@stm.uniroma3.it, Sebastiani, M.1, Staia, M.H.2, Puchi Cabrera, E.2
Source: Surface & Coatings Technology. Dec2008, Vol. 203 Issue 5-7, p566-571. 6p.
Subjects: Surface coatings, Physical vapor deposition, Tribology, Mechanical wear, Hardness, Simulation methods & models
Abstract: Abstract: In the present work, tribological performances of duplex coatings (Ti/TiN PVD and WC-Co HVOF) on Ti6Al4V substrates were investigated by analytical modelling and experimental assessment of mechanical/tribological properties. An analytical study of the contact stress distribution under a spherical indenter was performed, considering changes in stress distribution after adoption of the WC-Co intermediate coating as a load support layer. Experimental activities consisted of micro- and nanoindentation testing, HRC adhesion test and ball-on-disc sliding wear test (Alumina counterpart) under dry atmosphere. Morphology of the worn surface and layer failure mechanisms (i.e. wear mechanisms, coating surface and sub-surface delamination, crack propagation modes, role of interfaces) were then analysed by FIB-SEM techniques. Results showed that the use of a WC-Co interlayer with intermediate hardness and stiffness provides a more effective distribution of contact strain, with a significant increase of load carrying capacity and wear resistance of samples. A correlation between results of simulations, H/E and H 3/E 2 ratios and wear resistance of coatings is finally proposed. [Copyright &y& Elsevier]
Copyright of Surface & Coatings Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 35201347
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Tribological studies on PVD/HVOF duplex coatings on Ti6Al4V substrate
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  Data: <searchLink fieldCode="JN" term="%22Surface+%26+Coatings+Technology%22">Surface & Coatings Technology</searchLink>. Dec2008, Vol. 203 Issue 5-7, p566-571. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+vapor+deposition%22">Physical vapor deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Tribology%22">Tribology</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+wear%22">Mechanical wear</searchLink><br /><searchLink fieldCode="DE" term="%22Hardness%22">Hardness</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: In the present work, tribological performances of duplex coatings (Ti/TiN PVD and WC-Co HVOF) on Ti6Al4V substrates were investigated by analytical modelling and experimental assessment of mechanical/tribological properties. An analytical study of the contact stress distribution under a spherical indenter was performed, considering changes in stress distribution after adoption of the WC-Co intermediate coating as a load support layer. Experimental activities consisted of micro- and nanoindentation testing, HRC adhesion test and ball-on-disc sliding wear test (Alumina counterpart) under dry atmosphere. Morphology of the worn surface and layer failure mechanisms (i.e. wear mechanisms, coating surface and sub-surface delamination, crack propagation modes, role of interfaces) were then analysed by FIB-SEM techniques. Results showed that the use of a WC-Co interlayer with intermediate hardness and stiffness provides a more effective distribution of contact strain, with a significant increase of load carrying capacity and wear resistance of samples. A correlation between results of simulations, H/E and H 3/E 2 ratios and wear resistance of coatings is finally proposed. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Surface & Coatings Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.surfcoat.2008.06.055
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Physical vapor deposition
        Type: general
      – SubjectFull: Tribology
        Type: general
      – SubjectFull: Mechanical wear
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      – SubjectFull: Hardness
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      – SubjectFull: Simulation methods & models
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      – TitleFull: Tribological studies on PVD/HVOF duplex coatings on Ti6Al4V substrate
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            NameFull: Bemporad, E.
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            NameFull: Sebastiani, M.
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            NameFull: Staia, M.H.
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            NameFull: Puchi Cabrera, E.
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              Text: Dec2008
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              Y: 2008
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