Conclusions
The experimental results show that, starting from 800°C, friction of the boron carbide is characterized by high ductility associated with the formation of planar defects. The results show that the depth of the deformed layer to temperatures of 800–1000°C is determined by the grain size and in the regions of the coarse-grained material the layer is 10–15 μm deep which is 3–5 times greater than in the areas of the fine-grained material. The products of wear do not form a continuous layer on the friction surface of the Bi4C-B4C pair and are distributed in the form of individual clusters. Friction of this pair in air at temperatures above 600°C is accompanied by the formation of quasiamorphous oxide films.
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Translated from Poroshkovaya Metallurgiya, No. 8(284), pp. 93–97, August, 1986.
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Pilyankevich, A.N., Britun, V.F., Tkachenko, Y.G. et al. Structure of surface layers of boron carbide after friction in the temperature range 20–1400°C. Powder Metall Met Ceram 25, 690–694 (1986). https://doi.org/10.1007/BF00796744
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DOI: https://doi.org/10.1007/BF00796744