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Influence of morphology on friction anisotropy of GLAD Mo films.

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Title: Influence of morphology on friction anisotropy of GLAD Mo films.
Authors: Rodrigues, Guilherme B.1 (AUTHOR) guilherme.bernardes@femto-st.fr, Boulet, Pascal2 (AUTHOR), Martin, Nicolas1 (AUTHOR), Amiot, Fabien1 (AUTHOR), Colas, Guillaume1 (AUTHOR) guillaume.colas@femto-st.fr
Source: Tribology International. Jun2026, Vol. 218, pN.PAG-N.PAG. 1p.
Subjects: Morphology, Anisotropy, Glancing angle deposition, Porosity, Friction, Coulomb friction, Thin films, Columnar structure (Metallurgy)
Abstract: Frictional behavior of molybdenum thin films deposited by Glancing Angle Deposition (GLAD) was investigated at various deposition angles (α) using single-scratch tests under different loads and directions. Films deposited at α ≥ 5 0 ∘ developed elliptical columnar structures, resulting in orthotropic anisotropy due to direction-dependent plastic deformation. Increasing the deposition angle enhanced intercolumnar porosity, thereby reducing both friction and anisotropy. Conversely, the film deposited at α = 4 0 ∘ exhibited strong anisotropy and a non-Coulombic frictional response. Moreover, this film showed non-centrosymmetric behavior, requiring a non-linear model to accurately describe its frictional anisotropy. [Display omitted] • GLAD Mo films show orthotropic friction due to column chains at high deposition angles. • Increased porosity at grazing α reduces friction and anisotropy via lower column interaction. • For α = 40°, friction behavior is non-Coulombic and non-centrosymmetric. [ABSTRACT FROM AUTHOR]
Copyright of Tribology International 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: 191449324
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Influence of morphology on friction anisotropy of GLAD Mo films.
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  Data: <searchLink fieldCode="AR" term="%22Rodrigues%2C+Guilherme+B%2E%22">Rodrigues, Guilherme B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> guilherme.bernardes@femto-st.fr</i><br /><searchLink fieldCode="AR" term="%22Boulet%2C+Pascal%22">Boulet, Pascal</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Martin%2C+Nicolas%22">Martin, Nicolas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Amiot%2C+Fabien%22">Amiot, Fabien</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Colas%2C+Guillaume%22">Colas, Guillaume</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> guillaume.colas@femto-st.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Tribology+International%22">Tribology International</searchLink>. Jun2026, Vol. 218, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Morphology%22">Morphology</searchLink><br /><searchLink fieldCode="DE" term="%22Anisotropy%22">Anisotropy</searchLink><br /><searchLink fieldCode="DE" term="%22Glancing+angle+deposition%22">Glancing angle deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink><br /><searchLink fieldCode="DE" term="%22Friction%22">Friction</searchLink><br /><searchLink fieldCode="DE" term="%22Coulomb+friction%22">Coulomb friction</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink><br /><searchLink fieldCode="DE" term="%22Columnar+structure+%28Metallurgy%29%22">Columnar structure (Metallurgy)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Frictional behavior of molybdenum thin films deposited by Glancing Angle Deposition (GLAD) was investigated at various deposition angles (α) using single-scratch tests under different loads and directions. Films deposited at α ≥ 5 0 ∘ developed elliptical columnar structures, resulting in orthotropic anisotropy due to direction-dependent plastic deformation. Increasing the deposition angle enhanced intercolumnar porosity, thereby reducing both friction and anisotropy. Conversely, the film deposited at α = 4 0 ∘ exhibited strong anisotropy and a non-Coulombic frictional response. Moreover, this film showed non-centrosymmetric behavior, requiring a non-linear model to accurately describe its frictional anisotropy. [Display omitted] • GLAD Mo films show orthotropic friction due to column chains at high deposition angles. • Increased porosity at grazing α reduces friction and anisotropy via lower column interaction. • For α = 40°, friction behavior is non-Coulombic and non-centrosymmetric. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Tribology International 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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RecordInfo BibRecord:
  BibEntity:
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      – Type: doi
        Value: 10.1016/j.triboint.2026.111721
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Morphology
        Type: general
      – SubjectFull: Anisotropy
        Type: general
      – SubjectFull: Glancing angle deposition
        Type: general
      – SubjectFull: Porosity
        Type: general
      – SubjectFull: Friction
        Type: general
      – SubjectFull: Coulomb friction
        Type: general
      – SubjectFull: Thin films
        Type: general
      – SubjectFull: Columnar structure (Metallurgy)
        Type: general
    Titles:
      – TitleFull: Influence of morphology on friction anisotropy of GLAD Mo films.
        Type: main
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          Name:
            NameFull: Rodrigues, Guilherme B.
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            NameFull: Boulet, Pascal
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            NameFull: Martin, Nicolas
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            NameFull: Amiot, Fabien
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            NameFull: Colas, Guillaume
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 218
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