PROCESS FOR MANUFACTURING A PART PROVIDED WITH A LUBRICATING SURFACE COATING, PART PROVIDED WITH SUCH A COATING AND TURBOMACHINE

摘要

A process for manufacturing a part provided with a lubricating surface coating (10), in which: a composition is prepared that includes at least one precursor having at least one organic group, the composition is deposited on the part, a heat treatment is carried out, wherein the heat treatment of the coating is carried out at a temperature above 220° C., so as to form a lubricating surface coating (10) formed of an at least partially inorganic solid network incorporating solid carbon in at least one lubricating allotropic form in the dispersed state and trapped within the solid network. A part, such as a foil of a foil bearing (1) obtained by the process, a turbomachine, such as a turbomachine for a fuel cell, including such a part, and an aircraft cabin air-conditioning system including at least one such turbomachine are also described.

主权项

1. A process for manufacturing a part provided with a lubricating surface coating, wherein:
a composition comprising at least one precursor of said lubricating surface coating having at least one organic group is prepared, said composition is deposited on at least a portion of a surface of said part, said portion of a surface of the part being formed of at least one metallic material, after said composition has been deposited on the surface of said part, at least one heat treatment is carried out at a temperature greater than 220° C. so as to form a lubricating surface coating,wherein said composition comprises at least one precursor of said lubricating surface coating chosen from the group formed of the alkoxides of the following general formula (I):
X(O—R1)n′-a(R2)a  (I)wherein:
X is chosen from silicon (Si) and the metallic elements, —R1 is chosen from the hydrocarbyl groups, n′ is a natural integer representing the valence of the element X, a is a natural integer of the interval [1; n′ [, R2 is chosen from the organic groups bonded to X by a carbon atom,so as to form, at the end of said heat treatment, a lubricating surface coating formed of an at least partially inorganic solid network incorporating solid carbon in at least one lubricating allotropic form in a dispersed state and trapped within said solid network.