Influence of elastohydrodynamic conditions in highly loaded lubricated contacts on the wear behaviour of TiN coatings prepared by R.F. Bias sputtering

Extremely hard Tin coatings were deposited onto steel substrates using reactive r.f. magnetron sputtering with an r.f. substrate bias. Their composition, morphology, crystal structure, hardness and wear resistance in lubricated ball-on-disc test were investigated. The nitrogen content varied between...

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Bibliographic Details
Published in:Surface & coatings technology 1988-12, Vol.36 (3-4), p.765-772
Main Authors: Roth, TH, Broszeit, E., Kloos, K.H.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Nonmetallic coatings
Physics
Production techniques
Specific materials
Surface treatment
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Summary:Extremely hard Tin coatings were deposited onto steel substrates using reactive r.f. magnetron sputtering with an r.f. substrate bias. Their composition, morphology, crystal structure, hardness and wear resistance in lubricated ball-on-disc test were investigated. The nitrogen content varied between 25 and 52 at.% depending on the N2 partial pressure. Coatings with a nitrogen deficit showed a considerable ε-Ti2N content. Stoichiometric TiN was strongly (111) oriented. The coatings with a high ε-Ti2N content showed hardness values of up to 4500 HV 0.015. Coated balls were tested in a lubricated ball-on-disc test with a high load and an initial hertzian pressure of 2800 N mm-2. The coatings showed good wear behaviour. The wear scars of the best coatings, which were not removed even after 20 h of running, showed excellent correlation to elastohydrodynamic theory.
ISSN:0257-8972
1879-3347
DOI:10.1016/0257-8972(88)90016-3