AUTHOR=Zhang Jianjun , Wang Zhaoxun , Chen Wei , Liao Huimin , Zeng Ming , Ma Sude 

TITLE=Wear in Silicon Nitride Sliding Against Titanium Alloy Pairs at Different Loads Under Artificial Seawater Lubrication

JOURNAL=Frontiers in Materials

VOLUME=6

YEAR=2019

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2019.00155

DOI=10.3389/fmats.2019.00155

ISSN=2296-8016

ABSTRACT=<p>Tribological behaviors of Si<sub>3</sub>N<sub>4</sub> ceramic sliding against titanium alloy at different normal loads under seawater lubricated conditions are investigated on a pin-on-disc tester. Generally, for Si<sub>3</sub>N<sub>4</sub>/titanium alloy pair, the friction coefficient increases from 0.43 to 0.67 with load increasing (from 10 to 30N). Correspondingly, the wear rate is in the consistent case. When Si<sub>3</sub>N<sub>4</sub> slides against titanium alloy, the wear mechanism is dominated by mechanical wear even though under seawater lubrication. With load increasing, the shear force of solid shear (τ<sub><italic>s</italic></sub> × <italic>A</italic><sub><italic>r</italic></sub>) and furrow drag (<italic>S</italic> × <italic>P</italic><sub><italic>e</italic></sub>)(<italic>S</italic> × <italic>P</italic><sub><italic>e</italic></sub>) aggravated, which should be responsible for the rising trend of friction coefficient and wear rate.</p>