Tribological Properties of Aluminum and Silicon Borides at High Temperatures

Takashi Murakami; Atsushi Korenaga; Tsuguyori Ohana; Haruyuki Inui

doi:10.4028/www.scientific.net/MSF.941.1984

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HomeMaterials Science ForumMaterials Science Forum Vol. 941Tribological Properties of Aluminum and Silicon...

Tribological Properties of Aluminum and Silicon Borides at High Temperatures

Abstract:

In our present study, AlB₁₂ and SiB₆ plate specimens prepared by spark plasma sintering AlB₁₂ and SiB₆ powders, respectively, and their tribological properties were investigated in the temperature range of 25°C to 1000°C in air. Also, the micro Vickers hardness of the AlB₁₂ and SiB₆ plate specimens were evaluated in the temperature range of 25°C to 1000°C in an Ar gas atmosphere. It was found that both the steady friction coefficients of the AlB₁₂ and SiB₆ plate specimens were as low as 0.07 to 0.08 at 1000°C. According to XPS analyses, it was found that Al₂O₃ and B₂O₃ films were observed on the worn surfaces of the AlB₁₂ plate specimens after sliding at 1000°C. On the other hand, SiO₂ and B₂O₃ films were observed on the worn surfaces of the SiB₆ plate specimens after sliding at the same temperature. It was also found that both the boride plate specimens exhibited micro Vickers hardness as high as 20 GPa in the temperature range of 25°C to 1000°C.

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Materials Science Forum (Volume 941)

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1984-1989

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https://doi.org/10.4028/www.scientific.net/MSF.941.1984

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December 2018

Authors:

Takashi Murakami*, Atsushi Korenaga, Tsuguyori Ohana, Haruyuki Inui

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AlB₁₂, High-Temperature, SiB₆, Spark Plasma Sintering, Tribology

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