Thermal protection method

A method for thermally protecting a part chosen from:

• a drive shaft,
• an engine attachment harness,
• an element for isolating an engine,
• a cylinder,
• a pipe,
• a cable,
• a conveyor roller,
• a system for attaching and driving said rollers,
• an insulation mat used in the thermal protection of a nacelle of an engine,
• an insulation mat used in the thermal protection of an engine,
• a suspension structure of an engine,
• a thrust reverser,
• a fluid supply element of an engine, and
• a tube in which a fluid flows,
• said method comprising placing a protective screen in an in-use position, in which said protective screen physically isolates at least one portion of said part from a heat source, said heat source being configured to bring the temperature of said at least one portion of said part to a temperature of between 400° C. and 900° C. in the absence of said protective screen,
• the protective screen comprising a support of glass yarns, said yarns being at least partially coated with a coating having a mean thickness of greater than 0.05 μm and less than 2 μm and consisting of a dry binder and of protective particles of a crystalline material having a melting point above 1000° C. and consisting of one or more oxides in an amount of more than 95% of its mass,
• said coating covering more than 50% of the outer surfaces of more than 50% by number of the yarns of said support,
• corundum, zircon, zirconia, mullite, cordierite, eskolaite, spinel, steatite, enstatite, and mixtures thereof, representing more than 80% of the mass of the crystalline phases of the material of the protective particles.

A method for thermally protecting a part chosen from:

• a drive shaft,
• an engine attachment harness,
• an element for isolating an engine,
• a cylinder,
• a pipe,
• a cable,
• a conveyor roller,
• a system for attaching and driving said rollers,
• an insulation mat used in the thermal protection of a nacelle of an engine,
• an insulation mat used in the thermal protection of an engine,
• a suspension structure of an engine,
• a thrust reverser,
• a fluid supply element of an engine, and
• a tube in which a fluid flows,
• said method comprising:
• placing a protective screen in an in-use position, in which said protective screen physically isolates at least one portion of said part from a heat source, said heat source being configured to bring the temperature of said at least one portion of said part to a temperature of between 400° C. and 900° C. in the absence of said protective screen,
• the protective screen comprising a support of glass yarns at least partially coated with a coating consisting of a dry binder and of protective particles of a crystalline material having a melting point above 1000° C. and consisting of one or more oxides in an amount of more than 95% of its mass, said coating covering more than 50% of the outer surfaces of more than 50% by number of the yarns of said support,
• the coating having a mean thickness of greater than 0.05 μm and less than 2 μm;
• the mass of the coating, on the basis of the mass of the protective screen, being greater than 3% and less than 25%;
• corundum, zircon, zirconia, mullite, cordierite, eskolaite, spinel, steatite, enstatite, and mixtures thereof, representing more than 80% of the mass of the crystalline phases of the material of the protective particles;
• said method comprising a production of the protective screen, said production comprising the following steps 1) to 3):
• 1) preparing the support and a suspension comprising a liquid binder and the protective particles and/or precursors of protective particles;
• 2) applying said suspension to the yarns of the support so as to cover more than 50% of the outer surfaces of more than 50% by number of the yarns of the support;
• 3) drying so as to reduce the water content in order to convert the suspension into a coating which is in a solid form,
• the suspension comprising a film-forming agent.