Abstract
A thin coating of 2D titanium carbide has proved to be the most wear-resistant solid lubricant yet identified, according to researchers who put the material through its paces ( ACS Nano 2021, DOI: 10.1021/acsnano.1c01555 ). The coating is part of a large family of materials known as MXenes , transition-metal carbides or nitrides containing layers just a few atoms thick that are being tested in applications such as sensing , catalysis , and energy storage . Low-friction coatings made of graphene and other 2D materials often wear off too quickly to be useful in practical applications. In contrast, MXenes could be robust enough to act as solid lubricants in high-temperature industrial processes or in space-based applications. Philipp G. Grützmacher of Vienna University of Technology and colleagues used an electrospraying process to coat a piece of stainless steel with a 100 nm thick layer of titanium carbide powder. The researchers then
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