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Title: Comparison of fretting wear of Cr-rich CrN and TiN coatings in air of different relative humidities
Authors: Chen, H
Wu, PQ
Xu, KW
STALS, Lambert 
He, JW
Celis, JP
Issue Date: 2002
Source: WEAR, 253(5-6). p. 527-532
Abstract: The CrN and TiN coatings deposited on tool steel substrates by ion beam assisted deposition (IBAD) and triode ion-plating techniques, respectively, were investigated. The fretting wear of these coatings has been determined in air of different relative humidities (RHs). The results show that the coefficient of friction of the CrN coatings versus corundum at 50 and 85% RH is about 0.3, slightly higher than that of the TiN coatings. However, the TiN coatings exhibit a high coefficient of friction of about 0.8 at RH < 10%, while the CrN coatings present a much lower coefficient of friction of about the same level as at the high RH. In addition, the volumetric wear loss of the CrN coatings is small compared to the TiN coatings especially at the low RH. The wear rate expressed as wear volume per dissipated energy indicates that the CrN coatings possess better fretting wear resistance than the TiN coatings. Based on these properties, the CrN coatings should be preferred for fretting contacts against corundum, especially in very dry environments. (C) 2002 Elsevier Science B.V. All rights reserved.
Notes: Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Louvain, Belgium. Xian Jiaotong Univ, State Key Lab Mech Behav & Mat, Xian 710049, Peoples R China. Limburgs Univ Ctr, Mat Res Inst, B-3590 Diepenbeek, Belgium.Chen, H, Katholieke Univ Leuven, Dept Met & Mat Engn, Kasteelpk Arenberg 44, B-3001 Louvain, Belgium.
Keywords: CrN; TiN; fretting wear; humidity
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ISSN: 0043-1648
e-ISSN: 1873-2577
DOI: 10.1016/S0043-1648(02)00113-8
ISI #: 000178490600002
Category: A1
Type: Journal Contribution
Validations: ecoom 2003
Appears in Collections:Research publications

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