Method for preparing ammonium thiomolybdate-porous amorphous carbon composite superlubricity film
US11613806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2021 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Jul 14, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/584
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for preparing an ammonium thiomolybdate-porous amorphous carbon composite superlubricity film is disclosed. First, a porous amorphous carbon film is prepared by an anode layer ion source assisted plasma chemical vapor deposition method and a reactive magnetron sputtering method on a substrate. The porous amorphous carbon film is then impregnated in an ammonium thiomolybdate solution, so that the ammonium thiomolybdate is adsorbed on the porous amorphous carbon film, and the impregnated porous amorphous carbon film is air dried. During the friction process, the composited porous amorphous carbon superlubricity film prepared in the present disclosure promotes the in-situ decomposition of ammonium thiomolybdate to generate molybdenum disulfide by utilizing the friction heat at the initial stage of running-in, further to generate a graphene-like structure under the function of a catalyst, thus realizing a macroscopic super lubricity through a heterogeneous incommensurate contact between graphene and molybdenum disulfide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.