Patent ID: 11873724
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC F  B  C | IPC B  C  F

Claim 18:
19. A method of manufacturing a component of a compressor assembly, the method comprising:
providing an aluminum alloy body having an aerodynamic surface, wherein the aluminum alloy body comprises an alloy of aluminum and at least one alloying element;
heating the aluminum alloy body to a first temperature below a solidus temperature of the alloy for a duration sufficient to cause the at least one alloying element to enter into a homogenous solid solution with the aluminum;
quenching the aluminum alloy body to ambient temperature to hold the at least one alloying element in the form of a supersaturated solid solution with the aluminum, wherein the supersaturated solid solution includes an aluminum matrix phase;
applying a heat-curable precursor coating composition to at least a portion of the aerodynamic surface of the aluminum alloy body; and then
heating the aluminum alloy body to a second temperature below the first temperature for a duration sufficient to cause the at least one alloying element to precipitate from the aluminum alloy matrix phase and form a precipitate phase within the aluminum alloy matrix phase,
wherein, heating the aluminum alloy body to the second temperature cures the heat-curable precursor coating composition and transforms the heat-curable precursor coating composition into a nonstick coating on the aerodynamic surface of the aluminum alloy body, and
wherein the nonstick coating comprises a polysiloxane, zirconia, silica, alumina, titanium dioxide, polyvinylidene fluoride, a perfluoroalkoxy polymer, fluorinated ethylene-propylene, or a combination thereof.