Nanostructured self-lubricating CrN-Ag films deposited by PVD arc discharge and magnetron sputtering

被引：51
作者：
Incerti, L. [1 ,2 ]
Rota, A. [1 ,2 ]
Valeri, S. [1 ,2 ]
Miguel, A. [3 ]
Garcia, J. A. [3 ]
Rodriguez, R. J. [3 ]
Oses, J. [3 ]
机构：
[1] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41125 Modena, Italy
[2] CNR, Ist Nanosci, Ctr S3, I-41125 Modena, Italy
[3] AIN Surface Engn Ctr, Cordovilla Pamplona 31191, Spain
来源：
VACUUM | 2011年 / 85卷 / 12期
关键词：
CrN-Ag coating; PVD magnetron sputtering; PVD arc discharge; Tribology; Surface morphology; Temperature evolution; HARD COATINGS; TIN; TEMPERATURE; SILVER;
D O I：
10.1016/j.vacuum.2011.01.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CrN-Ag nanostructured coatings are deposited onto low-alloy steel substrates by means of Physical Vapour Deposition (PVD) reactive magnetron sputtering and PVD reactive arc discharge evaporation. The two different kinds of film have been characterized morphologically, chemically and tribologically. Depending on the used technique, as-deposited film shows different morphology, but in both cases. Ag nano-clusters are present on the surface. The annealing leads to coarsening of superficial Ag clusters and segregation out of the CrN matrix, depending on the temperature. After 600 degrees C annealing the surface is covered by an almost continuous layer of Ag, no matter which deposition technique is used. Tribological tests at different temperatures show that the lowest coefficient of friction appears at 600 degrees C for both coatings. The analysis of the wear tracks reveals that such a low friction is related to continuous Ag segregation out-of-CrN matrix, which enables self-lubrication. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1108 / 1113
页数：6
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