What question did this study set out to answer?

To investigate the atomistic mechanisms responsible for the vanishing friction force and ultralow friction coefficient of molybdenum disulphide coatings in ultrahigh vacuum conditions.

October 1, 1993Physical review. B, Condensed matter

Superlubricity of molybdenum disulphide

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To investigate the atomistic mechanisms responsible for the vanishing friction force and ultralow friction coefficient of molybdenum disulphide coatings in ultrahigh vacuum conditions.
Measured friction coefficients of molybdenum disulphide (MoS2) solid lubricant coatings under ultrahigh vacuum conditions.
Imaged wear particles using high-resolution transmission electron microscopy (HRTEM) lattice fringe imaging to detect crystal orientation and structure.
Simulated [0001] MoS2 crystal TEM lattice fringe images and generated rotational Moiré patterns by superimposing rotated lattice images to compare with experimental wear data.
Demonstrated an ultralow friction coefficient in the 10⁻³ range under ultrahigh vacuum conditions.
Observed friction-induced alignment of easy-shear basal planes parallel to the sliding direction, paired with rotational disorder around the c-axis.
Demonstrated qualitative agreement between experimental and simulated rotational Moiré patterns, attributing ultralow friction to superlubricity caused by frictional anisotropy during intercrystallite slip.

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Implication

Experimental study reveals ultralow friction in vacuum-tested molybdenum disulphide coatings, indicating superlubricity arises from frictional anisotropy between misaligned basal planes.

Cite This Study

Martin et al. (1993) studied this question.

synapsesocial.com/papers/6a801db273f13514bdeead79 https://doi.org/10.1103/physrevb.48.10583

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Implication

Experimental study reveals ultralow friction in vacuum-tested molybdenum disulphide coatings, indicating superlubricity arises from frictional anisotropy between misaligned basal planes.

Superlubricity of molybdenum disulphide

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Discussion

Implication

Cite This Study

Superlubricity of molybdenum disulphide

Key Points

Discussion

Implication

Cite This Study

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