[Kovove materialy - Metallic materials]
    Mon - April 22, 2024 - 06:43 No. of hits : 1743034 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 57 (2019), Issue 6

Mechanical and tribological properties of TiB2-Ti composites prepared by spark plasma sintering
PUCHY, V., KOVÁČIK, J., KOVALČÍKOVÁ, A., SEDLÁK, R., DŽUNDA, R., DUSZA, J., FALAT, L., PODOBOVÁ, M., BESTERCI, M., HVIZDOŠ, P.
vol. 57 (2019), no. 6, pp. 435 - 442
DOI: 10.4149/km_2019_6_435

Abstract
The TiB2-Ti composites with different concentrations of the Ti metallic second phase were prepared by the spark plasma sintering. We investigated the tribological properties of TiB2 and TiB2-Ti materials by ball-on-disc technique on the HTT CSM tribometer under loads of 1, 5, and 10 N. The wear tracks morphology was investigated by scanning electron and confocal microscopy. The microstructures of the TiB2 + Ti materials consist of a small-grained matrix with relatively well dispersed TiB2 particulate grains. The wear test results show that the wear rate of composites is gradually reduced over the sliding speed range for all normal loads. The composite wear rates are lower than the monolith ones. The Ti phase played a dual role in improving the tribological properties of the TiB2-Ti composites by acting as a lubricant and in increasing the fracture toughness by influencing the microstructure and mechanical properties.

Key words
TiB2-Ti composites, spark plasma sintering, coefficient of friction, wear

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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