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Friction and wear properties of DLC-coated plasma nitrided steel in unidirectional and reciprocating sliding
Podgornik, Bojan (Author), Vižintin, Jože (Author), Ronkainen, Helena (Author), Holmberg, Kenneth (Author)

URLURL - Presentation file, Visit http://www.elsevier.nl/gej-ng/29/30/25/109/23/62/abstract.html This link opens in a new window

Abstract
In this study samples of AISI 4140 steel were surface treated by plasma nitriding and coated with a hydrogen-free hard carbon coating, also known as tetrahedral amorphous carbon coating (ta-C). The specimens were investigated with respect to their microhardness, residual stress, coating adhesion and dry sliding wear resistance. Wear tests in which duplex-treated specimens were mated to hardened ball bearing steel were performed under unidirectional and reciprocating sliding. To examine the influence of the nitriding conditions on the performance of duplex-treated steel, the coating was deposited on hardened as well as on plasma nitrided samples, nitrided under two different nitriding conditions. The results show greatly improved sliding wear resistance of plasma-nitrided hard-coated specimens compared with un-coated and pre-hardened ones, observed for both unidirectional and reciprocating sliding. Furthermore, the hydrogen-free hard carbon coating produced a reduction in the coefficient of friction of approximately one order of magnitude. Although previous investigations showed the negative effect of a compound layer, it was found that the compound layer may act as an intermediate hard layer, leading to superior tribological properties of the composite.

Language:English
Keywords:duplex treatment, DLC coating, plasma nitriding, unidirectional sliding, reciprocating sliding
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2000
Number of pages:str. 254-260
Numbering:Vol. 377/378, issue 1/2
UDC:620.1/.2:621.7
ISSN on article:0040-6090
COBISS.SI-ID:4362011 Link is opened in a new window
Views:337
Downloads:170
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Record is a part of a journal

Title:Thin Solid Films
Shortened title:Thin solid films
Publisher:Elsevier Sequoia
ISSN:0040-6090
COBISS.SI-ID:1119759 This link opens in a new window

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