NDLI: Durability evaluation of selected solid lubricating films

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Durability evaluation of selected solid lubricating films

Content Provider	NASA Technical Reports Server (NTRS)
Author	Miyoshi, Kazuhisa
Copyright Year	2001
Description	An investigation was conducted to examine the coefficients of friction, wear rates, and durability of bonded molybdenum disulfide (MoS2), magnetron-sputtered MoS2, ion-plated silver, ion-plated lead, magnetron-sputtered diamondlike carbon (MS DLC), and plasma-assisted, chemical-vapor-deposited DLC (PACVD DLC) films in sliding contact with 6-mm-diameter AISI 440C stainless steel balls. Unidirectional ball-on-disk sliding friction experiments were conducted with a load of 5.9 N and a sliding velocity of 0.2 m/s at room temperature in three environments: ultrahigh vacuum (vacuum pressure, 7 x 10(exp -7) Pa), humid air (relative humidity, approx. 20 percent), and dry nitrogen (relative humidity, less than 1 percent). The main criteria for judging the performance of the solid lubricating films were coefficient of friction and wear rate, which had to be less than 0.3 and on the order of 10(exp -6) cu mm/N.m or less, respectively. The bonded MoS2 and magnetron-sputtered MoS2 films met the criteria in all three environments. The ion-plated lead and silver films met the criteria only in ultrahigh vacuum but failed in humid air and in dry nitrogen. The MS DLC and PACVD DLC films met the requirements in humid air and dry nitrogen but failed in ultrahigh vacuum.
File Size	810700
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20010068606
Archival Resource Key	ark:/13960/t5hb42v4r
Language	English
Publisher Date	2001-05-01
Access Restriction	Open
Subject Keyword	Nonmetallic Materials Evaluation Molybdenum Disulfides Lubricants Plasmas Physics Durability Nitrogen Carbon Silver Coefficient of Friction Vapor Deposition Magnetron Sputtering Metal Films Humidity Ultrahigh Vacuum Sliding Friction Drying Loads Forces Metal Ions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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