Genesis of Superlow Friction in Strengthening Si-DLC/PLC Nanostructured Multilayer Films for Robust Superlubricity at Ultrahigh Contact Stress

• DOI: 10.1021/acsami.2c16286
• Publication Date: 2022-11-02T15:10:50Z
• Authors: Wenli Deng; Yinhui Wang; Qingyuan Yu; Xinchun Chen; Peng Huang; Xi Yu; Wei Qi; Xuewu Li; Chenhui Zhang; Jianbin Luo
• Keywords: Lubricity; Reciprocating motion; Nanotribology; Diamond-like carbon

Diamond-like carbon (DLC) films have significant potential to provide solutions for the friction reduction and lubricity problem of mechanical moving pairs. However, realization excellent lubrication or even superlubricity long lifetime under heavy loading conditions is still a great challenge, which crucial applications DLC in harsh environments. Here, we construct group property-strengthening Si-DLC/PLC multilayer that could withstand ultrahigh contact stresses achieve robust superlubricity. Under peak Hertz stress up 2.37 GPa, setup bilayer thickness 324 nm enables multilayered film (an overall 1.53 μm) superlow coefficient toward 0.001 an ultralow wear rate 3.13 × 10-9 mm3/Nm. An alternating load reciprocating test emphasizes this strengthening nanostructured possesses kind self-adaptation because its situ nanoclustering transformation local ordering sp2-C phases at sliding interface. The genesis applied evaluated comprehensively reveal toughening structural characteristics robustness near-zero features. findings design criterion carbon-based solid lubricants applicable