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

Jari Koskinen, Unto Tapper, Peter Andersson, Simo Varjus, Jukka Kolehmainen, Sanna Tervakangas, Wolfgang Buss

Research output: Contribution to conferenceConference articleScientific

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
Pages3794-3797
Publication statusPublished - 2009
MoE publication typeNot Eligible
EventAsian-European International Conference on Plasma Surface Engineering, AEPSE 2009 - Busan, Korea, Democratic People's Republic of
Duration: 20 Sep 200925 Sep 2009

Conference

ConferenceAsian-European International Conference on Plasma Surface Engineering, AEPSE 2009
Abbreviated titleAEPSE 2009
CountryKorea, Democratic People's Republic of
CityBusan
Period20/09/0925/09/09

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Texturing
Steel
Lubrication
Amorphous carbon
Oils
Friction
Coatings
Pore size
Lubricants
Wear of materials
Carbon films
Metal forming
Amorphous films
Powders
Carbon
Metals
Vacuum
Geometry
Substrates
Processing

Cite this

Koskinen, J., Tapper, U., Andersson, P., Varjus, S., Kolehmainen, J., Tervakangas, S., & Buss, W. (2009). Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. 3794-3797. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.
Koskinen, Jari ; Tapper, Unto ; Andersson, Peter ; Varjus, Simo ; Kolehmainen, Jukka ; Tervakangas, Sanna ; Buss, Wolfgang. / Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.
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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.",
author = "Jari Koskinen and Unto Tapper and Peter Andersson and Simo Varjus and Jukka Kolehmainen and Sanna Tervakangas and Wolfgang Buss",
note = "Project code: G3SU00165; Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, AEPSE 2009 ; Conference date: 20-09-2009 Through 25-09-2009",
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Koskinen, J, Tapper, U, Andersson, P, Varjus, S, Kolehmainen, J, Tervakangas, S & Buss, W 2009, 'Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication' Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of, 20/09/09 - 25/09/09, pp. 3794-3797.

Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. / Koskinen, Jari; Tapper, Unto; Andersson, Peter; Varjus, Simo; Kolehmainen, Jukka; Tervakangas, Sanna; Buss, Wolfgang.

2009. 3794-3797 Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

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

AU - Koskinen, Jari

AU - Tapper, Unto

AU - Andersson, Peter

AU - Varjus, Simo

AU - Kolehmainen, Jukka

AU - Tervakangas, Sanna

AU - Buss, Wolfgang

N1 - Project code: G3SU00165

PY - 2009

Y1 - 2009

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.

M3 - Conference article

SP - 3794

EP - 3797

ER -

Koskinen J, Tapper U, Andersson P, Varjus S, Kolehmainen J, Tervakangas S et al. Friction reduction by texturing of DLC coatings sliding against steel under oil lubrication. 2009. Paper presented at Asian-European International Conference on Plasma Surface Engineering, AEPSE 2009, Busan, Korea, Democratic People's Republic of.