Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication

J. Koskinen (Corresponding Author), Unto Tapper, Peter Andersson, Simo Varjus, J. Kolehmainen, S. Tervakangas, W. Buss

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.
Original languageEnglish
Pages (from-to)3794-3797
Number of pages4
JournalSurface and Coatings Technology
Volume204
Issue number23
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

friction reduction
Texturing
Steel
lubrication
Lubrication
Amorphous carbon
sliding
Oils
oils
steels
Friction
porosity
coatings
Coatings
carbon
Pore size
friction
lubricants
masking
Lubricants

Keywords

  • Lubrication
  • Pulsed plasma deposition
  • Surface texturing
  • Tribology

Cite this

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title = "Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication",
abstract = "It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.",
keywords = "Lubrication, Pulsed plasma deposition, Surface texturing, Tribology",
author = "J. Koskinen and Unto Tapper and Peter Andersson and Simo Varjus and J. Kolehmainen and S. Tervakangas and W. Buss",
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Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. / Koskinen, J. (Corresponding Author); Tapper, Unto; Andersson, Peter; Varjus, Simo; Kolehmainen, J.; Tervakangas, S.; Buss, W.

In: Surface and Coatings Technology, Vol. 204, No. 23, 2010, p. 3794-3797.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication

AU - Koskinen, J.

AU - Tapper, Unto

AU - Andersson, Peter

AU - Varjus, Simo

AU - Kolehmainen, J.

AU - Tervakangas, S.

AU - Buss, W.

N1 - Project code: G3SU00165

PY - 2010

Y1 - 2010

N2 - It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.

AB - It has been demonstrated that tetrahedral amorphous carbon (ta-C) films provide excellent wear and friction properties in dry sliding. Recently the applications of ta-C coatings in lubricated conditions have become more important. The use of carbon coatings aims at reducing the wear and coefficient of friction under minimum lubrication and without hazardous lubricant additives. For optimum tribological performance, a modification of the ta-C coated surfaces is required. The present paper describes an innovative method of coated surface texturing, by which nanometer and micrometer size pores are processed by various methods. Particle masking was used for processing micrometer size pores and for controlling the coating growth conditions in order to produce nanometer size pores in the ta-C surface. The masking by particles yielded a pore geometry which varied from complex shaped channels to small individual pores. The texturing was performed by distributing metallic powder particles on the surface or by direct chemical deposition of metal particles on the substrate in prior to pulsed vacuum arc deposition. The tribological characterization was carried out by applying reciprocating friction tests with controlled lubricant replenishment, in order to simulate metal forming processes. The friction reducing effect, which was observed in the tribological tests, indicated a microlubrication effect of the textured coating surfaces.

KW - Lubrication

KW - Pulsed plasma deposition

KW - Surface texturing

KW - Tribology

U2 - 10.1016/j.surfcoat.2010.04.058

DO - 10.1016/j.surfcoat.2010.04.058

M3 - Article

VL - 204

SP - 3794

EP - 3797

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

IS - 23

ER -