Abstract
In this article, friction and wear characteristics of BaCr2O4 ceramics have been investigated using a high-temperature friction and wear tester from room temperature to 800 °C in dry sliding against sintered alumina ball. At room temperature, the friction coefficient and wear rate of BaCr2O4 ceramics are quite high. BaCr2O4 ceramics exhibit low friction coefficients and small wear rates with temperature increasing up to 400–600 °C. The oxidation reaction of BaCr2O4 during high-temperature wear tests is responsible for the tribological properties. The oxidized product of BaCr2O4 is BaCrO4, which forms a smooth self-lubricating film on the worn surface to effectively reduce friction and wear. However, at 800 °C, severe oxidation reduces the relative density of sintered BaCr2O4 ceramics, and further expedites the materials removal process.
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The authors would like to acknowledge with thanks the financial supports from the National 863 High-Tech Project (2006AA03Z537), the National Natural Science Foundation of China (NSFC-No. 50572020 and 51021002), the Program for New Century Excellent Talents in University (NCET-06-0339), and the Fundamental Research Funds for the Central Universities (Grant No. HIT. BRET1.2010006).
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Liang, XS., Ouyang, JH., Liu, ZG. et al. Friction and Wear Characteristics of BaCr2O4 Ceramics at Elevated Temperatures in Sliding Against Sintered Alumina Ball. Tribol Lett 47, 203–209 (2012). https://doi.org/10.1007/s11249-012-9984-x
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DOI: https://doi.org/10.1007/s11249-012-9984-x