NDLI: Effect of temperature on tribological performance of a silicon nitride ball material with a linear perfluoropolyalkylether

Content Provider	Springer Nature Link
Author	Trivedi, H.K. Saba, C.S.
Copyright Year	2001
Abstract	The effect of temperature in rolling contact performance of a hot isostatically pressed (HIP) silicon nitride ball material with a linear perfluoropolyalkylether (PFPAE) was studied using a ball-on-rod type rolling contact fatigue tester. The test temperature ranged from ambient to 343 °C for a period of 24 h at a stress of 5.5 GPa using thin dense chrome (TDC)-coated T-15 bearing races. The lubricant and its decomposition products, specifically acid fluoride and acids, attacked Si$_{3}$N$_{4}$ balls at all test temperatures resulting in corrosion pitting. The presence of metal fluoride on all the Si$_{3}$N$_{4}$, transferred from the races, was detected by X-ray photon spectroscopy (XPS). The thickness of the oxide layer formed on the balls, as determined by Auger electron spectroscopy (AES) increased with temperature. The changes in physical properties of post-test lubricant showed that the lubricant was stable at temperatures up to 288 °C. The change in viscosity was constant up to 288 °C and with a significant change above 288 °C. The FTIR analysis of 316 and 343 °C post-test lubricant showed the presence of carboxylic acid. The total acid number (TAN) increased linearly up to 288 °C and accelerated at 316 and 343 °C. The study indicates that the use of Si$_{3}$N$_{4}$ balls with a linear PFPAE results in an incompetent tribo system.
Starting Page	171
Ending Page	177
Page Count	7
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	10
Issue Number	3
e-ISSN	15732711
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Surfaces and Interfaces, Thin Films Mechanics
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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