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Related Experiment Video

Updated: Nov 7, 2025

Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel
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Macroscale Superlubricity Accomplished by Sb2O3-MSH/C Under High Temperature.

Kai Gao1,2, Bin Wang1, Asghar Shirani3

  • 1State Key Laboratory of Tribology, Tsinghua University, Beijing, China.

Frontiers in Chemistry
|May 3, 2021
PubMed
Summary

This study achieved high-temperature superlubricity in coatings using antimony trioxide (Sb2O3) and magnesium silicate hydroxide with carbon (MSH/C). These coatings reached a superlubricity coefficient of friction (COF) of 0.008 at 300°C.

Keywords:
Sb2O3burnishinghigh-temperaturemacroscale superlubricitymagnesium silicate hydroxidetribochemistrytribology

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Area of Science:

  • Materials Science
  • Tribology
  • Surface Engineering

Background:

  • Superlubricity is a state of extremely low friction, crucial for reducing wear and energy loss in mechanical systems.
  • Achieving superlubricity at high temperatures remains a significant challenge, limiting applications in demanding environments.
  • Nickel superalloys are vital in high-temperature applications but suffer from friction and wear issues.

Purpose of the Study:

  • To develop and investigate a novel coating for achieving high-temperature superlubricity on nickel superalloy substrates.
  • To elucidate the tribological mechanisms responsible for superlubricity under elevated temperatures.
  • To evaluate the protective and lubricating properties of the developed coating system.

Main Methods:

  • Coating deposition via burnishing antimony trioxide (Sb2O3) and carbon-coated magnesium silicate hydroxide (MSH/C) powders onto a nickel superalloy.
  • Tribological testing in an open-air environment across a range of temperatures.
  • Surface analysis using in-situ Raman spectroscopy, cross-sectional transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS).

Main Results:

  • The coating exhibited a decreasing coefficient of friction (COF) with increasing temperature, reaching superlubricity (COF = 0.008) at 300°C.
  • Synergistic effects between the Sb2O3 adhesion layer and the MSH/C top layer protected the substrate from sliding and oxidation.
  • Tribochemically activated formation of an amorphous carbon layer on the coating surface was observed via TEM and XPS.

Conclusions:

  • The developed Sb2O3/MSH/C coating enables macroscale superlubricity at high temperatures.
  • The synergistic action of the coating layers and the formation of a protective amorphous carbon film are key to achieving this phenomenon.
  • This research offers a promising solution for reducing friction and wear in high-temperature applications involving nickel superalloys.