Influence of morphology on friction anisotropy of GLAD Mo films

Tribology International 2026 Open access

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Authors: Guilherme B. Rodrigues, Pascal Boulet, Nicolas Martin, Fabien Amiot, Guillaume Colas
DOI: 10.1016/j.triboint.2026.111721
Cited by: 2
References: 44

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.

Fields of Study & Subjects

Metal and Thin Film Mechanics Microstructure and mechanical properties Adhesion Friction and Surface Interactions

Publication details

Journal / source
Tribology International
Publisher
Elsevier BV
Volume
218
Pages
111721–111721
Publication date
23 January 2026
Language
EN