Evaluation of Wear Measurement with Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Zellhofer, Manuel; Jech, Martin; Badisch, E.; Ditrói, F.; Kübler, Andreas; Mayrhofer, Paul H.

doi:10.1007/s11249-022-01587-2

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…Successful engineering applications often rely on the tribological performance of materials within their systems [1][2][3]. From hip prostheses [4] and DLC coatings [5] to NASA's Mars rover wheels [6], wear is often the focus of attention because of its drastic consequences if not predicted accurately. In terms of capital, a loss of as high as 6% of the annual U.S. gross domestic product was attributed to mechanical wear a few decades ago [7].…”

Section: Introductionmentioning

confidence: 99%

A Closer Look at the Contact Conditions of a Block-on-Flat Wear Experiment

2022

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Specific wear rates of tribosystems always rely on the data obtained from wear experiments. Nonetheless, the events taking place during an experiment may often lead to wide variations and low repeatability of the results. In this work, the authors attempt to take a closer look into the dynamic contact conditions of a dry linearly reciprocating block-on-flat wear experiment. The finite element method and Archard’s wear model are used through COMSOL Multiphysics® 5.2a and LiveLink™ for MATLAB® software to model the wear and study the influence of different conditions of the block surface and alignment of the sample. Changes of the geometry of the block and the contact pressure are quantified for several back and forth motions, using an extrapolation scheme in the wear modelling methodology. The tracking of such changes allow a dynamic overview of how the block contact area and the contact pressure distribution change throughout time. The results show how the assumption of a constant contact area and use of a nominal contact pressure in calculating the wear rate in such experiments can be inappropriate, especially in the presence of roughness and misalignments of the block.

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Section: Introductionmentioning

confidence: 99%

A Closer Look at the Contact Conditions of a Block-on-Flat Wear Experiment

2022

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In-situ Verschleißmessung an DLC-Schichten unter anwendungsnahen Bedingungen

Zellhofer,

Jech,

Badisch

2024

Berg Huettenmaenn Monatsh

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Understanding DLC system failure influenced by progressed wear

Zellhofer,

Jech,

Badisch

et al. 2024

Surface Engineering

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Diamond-like carbon (DLC) coatings are among the toughest and most effective measures for preventing wear on critical surfaces. Due to its high wear resistance, the deterioration of the protective coating only occurs upon failure. Understanding the events leading to failure and identifying a mild-abrasive wear process is crucial for sustainable application. We implemented a ‘Wöhler-like’ test matrix on a tribometer with oscillating tribocontact, employing radioactive isotopes for continuous wear measurements. This method allows to analyse the relationship between load and cycling or test time. When combined with friction coefficient changes, it enables the distinction between mild and severe wear, ultimately pinpointing the point of DLC deterioration. This approach was employed to compare different diesel lubricants, and its effectiveness was demonstrated. The relationship between loading condition and remaining DLC thickness illustrates that mild-abrasive wear is the critical factor for DLC lifetime, ultimately leading to coating system failure.

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Evaluation of Wear Measurement with Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Cited by 3 publications

References 32 publications

A Closer Look at the Contact Conditions of a Block-on-Flat Wear Experiment

A Closer Look at the Contact Conditions of a Block-on-Flat Wear Experiment

In-situ Verschleißmessung an DLC-Schichten unter anwendungsnahen Bedingungen

Understanding DLC system failure influenced by progressed wear

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