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MOS Capacitor

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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Robust Low-friction And Low-wear Tinbmotacr High-entropy Film Enabled By Periodically Inserting Curved Mos2 Sheets.

Home
Research Domains
Engineering
Materials Engineering
Wearable Materials
Robust Low-friction And Low-wear Tinbmotacr High-entropy Film Enabled By Periodically Inserting Curved Mos2 Sheets.

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Robust Low-Friction and Low-Wear TiNbMoTaCr High-Entropy Film Enabled by Periodically Inserting Curved MoS₂ Sheets.

Xinru Li¹, Yu Zhang¹, Xingjia He¹

¹State Key Laboratory of Superhard Materials, School of Materials Science and Engineering and Key Laboratory of Automobile Materials, MOE, Jilin University, Changchun 130012, PR China.

ACS Applied Materials & Interfaces

|March 21, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Introducing curved MoS2 nanosheets into refractory high-entropy alloy (HEA) films creates self-assembling nanoscrolls, significantly improving wear resistance and reducing friction for enhanced mechanical durability.

Keywords:

high-entropy alloys mechanical property nanomultilayer nanoscroll

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Area of Science:

Materials Science
Tribology
Nanotechnology

Background:

Refractory high-entropy alloys (HEAs) offer versatile properties but suffer from brittleness and abrasive wear.
High coefficients of friction (COF) in HEAs exacerbate wear, limiting their mechanical durability.

Purpose of the Study:

To enhance the tribological properties and mechanical durability of refractory HEA films.
To investigate the self-assembly mechanism of mixed metal oxides @MoS2 nanoscrolls for improved wear resistance.

Main Methods:

Periodic incorporation of curved molybdenum disulfide (MoS2) nanosheets into TiNbMoTaCr HEA films.
Tribological testing in an air environment to evaluate friction and wear performance.
Microstructural analysis to understand the formation and role of nanoscrolls.

tribological property

Main Results:

The modified HEA films exhibited significantly reduced COF (∼0.08) and wear rates (∼9.561 × 10^-8 mm^3/Nm) compared to pure HEA films.
Self-assembled mixed metal oxides @MoS2 nanoscrolls formed at the friction interface, featuring hard oxide cores and lubricating MoS2 shells.
The HEA acted as an oxygen scavenger, protecting MoS2 from oxidation and maintaining film hardness.

Conclusions:

The synergistic effect between HEA and MoS2 nanosheets, forming protective nanoscrolls, leads to superior low-friction and low-wear behavior.
This approach offers a promising strategy for designing HEA films with enhanced tribological properties for demanding applications.
The developed HEA films demonstrate improved mechanical durability and broader application potential.