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Related Concept Videos

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

193
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
193

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Updated: Sep 16, 2025

Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures
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On the Wear Mechanism and Subsurface Deformation of Zr-Based Metallic Glass at Subzero Temperature.

Xin Li1,2,3, Jianan Fu4, Zhen Li4

  • 1School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China.

Materials (Basel, Switzerland)
|July 12, 2025
PubMed
Summary

Metallic glasses exhibit significantly reduced wear rates at subzero temperatures, showing a 60% improvement compared to room temperature. This enhanced wear resistance in cold environments makes them suitable for extreme applications.

Keywords:
metallic glassessubsurface deformationsubzero temperaturewear mechanismwear properties

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Area of Science:

  • Materials Science
  • Tribology
  • Mechanical Engineering

Background:

  • Metallic glasses (MGs) possess excellent mechanical properties, making them suitable for advanced technological applications.
  • Their disordered atomic structure suggests potential for subzero engineering applications.
  • Limited research exists on the mechanical properties and wear behavior of MGs at subzero temperatures.

Purpose of the Study:

  • To investigate the wear properties and mechanisms of a Zr-based metallic glass (MG) at a subzero temperature of -50 °C.
  • To compare the wear performance of MGs in subzero conditions versus room temperature.
  • To understand the underlying reasons for observed differences in wear behavior.

Main Methods:

  • Systematic evaluation of wear properties and mechanisms of Zr-based MG.
  • Testing conducted at a specific subzero temperature (-50 °C) and compared with room temperature data.
  • Analysis of wear mechanisms, including oxidation, adhesion, and abrasion.

Main Results:

  • MGs exhibited approximately a 60% reduction in wear rate at -50 °C compared to room temperature.
  • At room temperature, MGs formed a brittle oxide layer, leading to oxidation, adhesive, and abrasive wear.
  • At subzero temperatures, only abrasive wear was observed, with a higher elastic modulus contributing to improved wear resistance.

Conclusions:

  • Zr-based MGs demonstrate superior wear resistance in subzero environments.
  • The absence of oxide layer formation and increased elastic modulus are key factors for enhanced performance at low temperatures.
  • Findings offer valuable insights for utilizing MGs in subzero engineering applications like deep space and polar exploration.