High-Temperature Tribological Properties of ReB2-Based Ceramic/Si3N4 Sliding Pairs

Takashi Murakami; Tsuguyori Ohana

doi:10.4028/www.scientific.net/MSF.1016.978

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HomeMaterials Science ForumMaterials Science Forum Vol. 1016High-Temperature Tribological Properties of...

High-Temperature Tribological Properties of ReB₂-Based Ceramic/Si₃N₄ Sliding Pairs

Abstract:

Our group prepared an ReB₂-based ceramic with a composition of Re-74.5at% B to investigate its microstructure, high-temperature microvickers hardness, and high-temperature tribological properties in air. The microvickers hardness of the ReB₂-based ceramic was higher than 2600 at temperatures below 1073 K. The friction coefficients of ReB₂-based ceramic/Si₃N₄ sliding pairs were stable and low (≃ 0.15) at 1073 K. We concluded that the low friction coefficients of the sliding pairs resulted from the formation of low-friction hexagonal BN and B₂O₃ films. The friction coefficients of the ReB₂-based ceramic/Si₃N₄ sliding pairs were also low at 298 K (≃ 0.3 to 0.4) and 1273 K (≃ 0.1), but were unstable and high ( 0.6) at 673 K.

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Materials Science Forum (Volume 1016)

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978-983

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https://doi.org/10.4028/www.scientific.net/MSF.1016.978

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Online since:

January 2021

Authors:

Takashi Murakami*, Tsuguyori Ohana

Keywords:

Boride, Friction, High Temperature, ReB₂, Spark Plasma Sintering, Tribology, Wear

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References

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