| CoF | Coefficient of friction |
| MoS2 | Molybdenum disulfide |
| WS2 | Tungsten disulfide |
| TMD | Transition metal dichalcogenide |
| h–BN | Hexagonal boron nitride |
| HT | High temperature |
| RT | Room temperature |
| SCF | Short carbon fibers |
| PI | Polyimide |
| PEEK | Polytheretherketone |
| PTFE | Polytetrafluoroethylene |
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