Molybdenum APS-Coatings: A Self-regenerative Solution for Wear Resistance in Dry-lubrication Applications

Ricardo Crespo Martins; Dennis Konopka; Mareike Dukat; Florian Pape; Martin Nicolaus; Kai Möhwald; Gerhard Poll; Max Marian

doi:10.24053/TuS-2025-0020

Molybdenum APS-Coatings: A Self-regenerative Solution for Wear Resistance in Dry-lubrication Applications

Ricardo Crespo Martins, Dennis Konopka, Mareike Dukat, Florian Pape, Martin Nicolaus, Kai Möhwald, Gerhard Poll, Max Marian

Research output: Contribution to journal › Article › Research

Abstract

Molybdenum coatings and their oxides are a promising technology to protect bearing surfaces from wear due to their good wear-resistance and their capability to regenerate by forming new protective and lubricious oxide layers. However, until recently, their applicability against higher hardness materials has not yet been studied. This study aims to explore Atmospheric Plasma Spraying (APS) to produce a molybdenum layer on bearing steel and compare the tribological behavior of coated and uncoated surfaces using a reciprocating pin-on-plate apparatus under dry-lubrication. The counter-body material was chosen to be alumina, given its inertness and high hardness. The tests were conducted at various distances and loads, comparing the friction and wear volumes of coated and uncoated specimens.

Original language	English
Pages (from-to)	54-58
Number of pages	5
Journal	Tribologie und Schmierungstechnik
Volume	72
Issue number	3-4
DOIs	https://doi.org/10.24053/TuS-2025-0020
Publication status	Published - Dec 2025

Keywords

Coatings
Wear-Resistant
Thermal Spraying
Solid Lubrication
DFG SPP 2074

Access to Document

10.24053/TuS-2025-0020

Cite this

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title = "Molybdenum APS-Coatings: A Self-regenerative Solution for Wear Resistance in Dry-lubrication Applications",

abstract = "Molybdenum coatings and their oxides are a promising technology to protect bearing surfaces from wear due to their good wear-resistance and their capability to regenerate by forming new protective and lubricious oxide layers. However, until recently, their applicability against higher hardness materials has not yet been studied. This study aims to explore Atmospheric Plasma Spraying (APS) to produce a molybdenum layer on bearing steel and compare the tribological behavior of coated and uncoated surfaces using a reciprocating pin-on-plate apparatus under dry-lubrication. The counter-body material was chosen to be alumina, given its inertness and high hardness. The tests were conducted at various distances and loads, comparing the friction and wear volumes of coated and uncoated specimens.",

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author = "{Crespo Martins}, Ricardo and Dennis Konopka and Mareike Dukat and Florian Pape and Martin Nicolaus and Kai M{\"o}hwald and Gerhard Poll and Max Marian",

year = "2025",

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doi = "10.24053/TuS-2025-0020",

language = "English",

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pages = "54--58",

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T1 - Molybdenum APS-Coatings

T2 - A Self-regenerative Solution for Wear Resistance in Dry-lubrication Applications

AU - Crespo Martins, Ricardo

AU - Konopka, Dennis

AU - Dukat, Mareike

AU - Pape, Florian

AU - Nicolaus, Martin

AU - Möhwald, Kai

AU - Poll, Gerhard

AU - Marian, Max

PY - 2025/12

Y1 - 2025/12

N2 - Molybdenum coatings and their oxides are a promising technology to protect bearing surfaces from wear due to their good wear-resistance and their capability to regenerate by forming new protective and lubricious oxide layers. However, until recently, their applicability against higher hardness materials has not yet been studied. This study aims to explore Atmospheric Plasma Spraying (APS) to produce a molybdenum layer on bearing steel and compare the tribological behavior of coated and uncoated surfaces using a reciprocating pin-on-plate apparatus under dry-lubrication. The counter-body material was chosen to be alumina, given its inertness and high hardness. The tests were conducted at various distances and loads, comparing the friction and wear volumes of coated and uncoated specimens.

AB - Molybdenum coatings and their oxides are a promising technology to protect bearing surfaces from wear due to their good wear-resistance and their capability to regenerate by forming new protective and lubricious oxide layers. However, until recently, their applicability against higher hardness materials has not yet been studied. This study aims to explore Atmospheric Plasma Spraying (APS) to produce a molybdenum layer on bearing steel and compare the tribological behavior of coated and uncoated surfaces using a reciprocating pin-on-plate apparatus under dry-lubrication. The counter-body material was chosen to be alumina, given its inertness and high hardness. The tests were conducted at various distances and loads, comparing the friction and wear volumes of coated and uncoated specimens.

KW - Coatings

KW - Wear-Resistant

KW - Thermal Spraying

KW - Solid Lubrication

KW - DFG SPP 2074

U2 - 10.24053/TuS-2025-0020

DO - 10.24053/TuS-2025-0020

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SN - 0724-3472

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EP - 58

JO - Tribologie und Schmierungstechnik

JF - Tribologie und Schmierungstechnik

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