TY - JOUR
T1 - DLC coated spur gears – Part II
T2 - coating properties and potential for industrial use
AU - Bobzin, Kirsten
AU - Brögelmann, Tobias
AU - Kalscheuer, Christian
AU - Thiex, Matthias
AU - Schwarz, Andreas
AU - Ebner, Martin
AU - Lohner, Thomas
AU - Stahl, Karsten
N1 - Publisher Copyright:
© 2021, Emerald Publishing Limited.
PY - 2021
Y1 - 2021
N2 - Purpose: This paper aims to address the coating and compound analysis of diamond-like carbon (DLC) on steel, to understand the frictional behavior in tribological gear systems presented in paper Part I. Here, the Ti and Zr modified DLC coating architectures are analyzed regarding their chemical, mechanical and thermophysical properties. The results represent a systematic analysis of the thermal insulating effect in tribological contact of DLC coated gears. Design/methodology/approach: The approach was to evaluate the effect of the substitution of Zr through Ti at the reference coating ZrCg to TiCg and the effect on thermophysical properties. Furthermore, the influence of different carbon and hydrogen contents on the coating and compound properties was analyzed. Therefore, different discrete Ti or Zr containing DLC coatings were deposited on an industrial coating machine. Thereby the understanding of the microstructure and chemical composition of the reference coatings is increased. Findings: Results prove comparable mechanical properties of metal modified DLC independent of differences in chemical compositions. Moreover, the compound adhesion between TiCg/16MnCr5E was improved compared to ZrCg/16MnCr5E. The effect of hydrogen content Ψ and carbon content xc on the thermophysical properties is limited by Ψ = 18 at.% and xc = 90 at.%. Practical implications: The findings of the combined papers Part I and II show a high potential for industrial application of DLC on gears. Based on the results DLC coatings and gears can be tailored to each other. Originality/value: Systematic analysis of DLC coatings were conducted to evaluate the effect of titanium, carbon and hydrogen on thermophysical properties.
AB - Purpose: This paper aims to address the coating and compound analysis of diamond-like carbon (DLC) on steel, to understand the frictional behavior in tribological gear systems presented in paper Part I. Here, the Ti and Zr modified DLC coating architectures are analyzed regarding their chemical, mechanical and thermophysical properties. The results represent a systematic analysis of the thermal insulating effect in tribological contact of DLC coated gears. Design/methodology/approach: The approach was to evaluate the effect of the substitution of Zr through Ti at the reference coating ZrCg to TiCg and the effect on thermophysical properties. Furthermore, the influence of different carbon and hydrogen contents on the coating and compound properties was analyzed. Therefore, different discrete Ti or Zr containing DLC coatings were deposited on an industrial coating machine. Thereby the understanding of the microstructure and chemical composition of the reference coatings is increased. Findings: Results prove comparable mechanical properties of metal modified DLC independent of differences in chemical compositions. Moreover, the compound adhesion between TiCg/16MnCr5E was improved compared to ZrCg/16MnCr5E. The effect of hydrogen content Ψ and carbon content xc on the thermophysical properties is limited by Ψ = 18 at.% and xc = 90 at.%. Practical implications: The findings of the combined papers Part I and II show a high potential for industrial application of DLC on gears. Based on the results DLC coatings and gears can be tailored to each other. Originality/value: Systematic analysis of DLC coatings were conducted to evaluate the effect of titanium, carbon and hydrogen on thermophysical properties.
KW - DLC coated gears
KW - Diamond-like carbon
KW - Thermophysical properties
UR - http://www.scopus.com/inward/record.url?scp=85106247855&partnerID=8YFLogxK
U2 - 10.1108/ILT-07-2020-0256
DO - 10.1108/ILT-07-2020-0256
M3 - Article
AN - SCOPUS:85106247855
SN - 0036-8792
VL - 73
SP - 621
EP - 634
JO - Industrial Lubrication and Tribology
JF - Industrial Lubrication and Tribology
IS - 4
ER -