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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Tribological Characteristics of Si3N4-HBN Ceramic...

Tribological Characteristics of Si₃N₄-HBN Ceramic Materials for Dry Application

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Abstract:

Using air lubricants, wear tests of Si₃N₄-hBN composites with different hexagonal boron nitride (hBN) volume fraction sliding against Si₃N₄ ceramic were carried out on a MMU-5G type pin-on-disc tester. For comparison, Si₃N₄/Si₃N₄ pairs were also tested under the same conditions. The worn surfaces of specimens were observed under scanning electron microscope (SEM). Furthermore, the wear debris were analyzed by using X-ray diffraction (XRD). Wear debris layers are formed on the wearing surface when Si₃N₄-hBN composites slide against Si₃N₄ ceramic under air lubrication. In this situation, the friction coefficients are as high as 0.80-1.20 and the wear coefficients are above 10-5 mm³/Nm for all materials tested.

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

146-152

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.146

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Online since:

November 2012

Authors:

Wei Chen, Yi Min Gao

Keywords:

Air Lubrication, Composite Ceramic, Friction, Silicon Nitrides

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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