Abstract:
Ceramic coatings are made from nanoparticles to improve heat resistance and bonding to a substrate. Composite materials made by coating a substrate with the nanoparticle ceramic coatings are less susceptible to delamination as compared to existing coatings. The nanoparticle ceramic coatings include metal nanoparticles. The metal nanoparticles absorb heat and migrate to the surface of the ceramic coating during exposure to extreme heat, thereby removing heat from the ceramic coating. The inventive coatings are particularly heat resistant and can withstand extreme temperatures such as 4000 °F. The nanoparticle ceramic coatings are particularly useful for coating ceramic tiles used to protect spacecraft on reentry to the earth's atmosphere. The coatings can also be applied underneath the tiles of a spacecraft as a safety measure in case a tile is damaged or lost during a flight.
Abstract:
Fiber-reinforced, heat resistant ceramic composites are made from a fiber material and a ceramic matrix. The ceramic matrix includes nanoparticles to improve heat resistance and strength of the composite material. The nanoparticles in the matrix composition disperse more evenly through the fiber material and penetrate into small pores on the surface of the fibers. Once cured, the dispersed nanoparticles improve bonding between the ceramic matrix and the fiber, thereby improving the overall strength of the composite material. In addition, the ceramic nanoparticles improve the density of the ceramic matrix and render the composite material exceptionally heat resistant. The strength and heat resistance of the ceramic composites of the present invention are particularly advantageous when used to make exhaust pipes for helicopters. The light weight, strength, and heat resistance can improve the performance of the helicopter.
Abstract:
An inlet valve is partially coated with a protective coating to resist corrosion and gas impingement when used in an internal combustion engine. The inlet valve has a hard cladding that is shaped to function as a valve seat. The hard cladding forms an interface with the valve head body, which is typically made of a softer metallic material than the hard cladding. The protective coating is bonded to the inlet valve and covers the cladding-body interface. The protective coating is resistant to corrosion, wear from gas impingement, and can withstand the high temperatures reached in internal combustion engines. A method for making the inlet valves generally includes masking a portion of the valve stem and the valve seat, applying a protective coating to cladding-body interface, and curing the protective coating or otherwise bonding the protective coating to the inlet valve. An apparatus for coating the valves includes a movable track, a plurality of attachment apparatus for holding a plurality of valves on the track, a spraying device for applying the coating, and an infrared lamp for curing the coating.
Abstract:
An inlet valve is partially coated with a protective coating to resist corrosion and gas impingement when used in an internal combustion engine. The inlet valve has a hard cladding that is shaped to function as a valve seat. The hard cladding forms an interface with the valve head body, which is typically made of a softer metallic mierial than the hard cladding. The protective coating is bonded to the inlet valve and covers the cladding-body interface. The protective coating is resistant to corrosion, wear from gas impingement, and can withstand the high temperatures reached in internal combustion engines. A method for making the inlet valves generally includes masking a portion of the valve stem and the valve seat, applying a protective coating to cladding-body interface, and curing the protective coating or otherwise bonding the protective coating to the inlet valve.
Abstract:
Fiber-reinforced, heat resistant ceramic composites are made from a fiber material and a ceramic matrix. The ceramic matrix includes nanoparticles to improve heat resistance and strength of the composite material. The nanoparticles in the matrix composition disperse more evenly through the fiber material and penetrate into small pores on the surface of the fibers. Once cured, the dispersed nanoparticles improve bonding between the ceramic matrix and the fiber, thereby improving the overall strength of the composite material. In addition, the ceramic nanoparticles improve the density of the ceramic matrix and render the composite material exceptionally heat resistant. The strength and heat resistance of the ceramic composites of the present invention are particularly advantageous when used to make exhaust pipes for helicopters. The light weight, strength, and heat resistance can improve the performance of the helicopter.
Abstract:
Ceramic coatings are made from nanoparticles to improve heat resistance and bonding to a substrate. Composite materials made by coating a substrate with the nanoparticle ceramic coatings are less susceptible to delamination as compared to existing coatings. The nanoparticle ceramic coatings include metal nanoparticles. The metal nanoparticles absorb heat and migrate to the surface of the ceramic coating during exposure to extreme heat, thereby removing heat from the ceramic coating. The inventive coatings are particularly heat resistant and can withstand extreme temperatures such as 4000 °F. The nanoparticle ceramic coatings are particularly useful for coating ceramic tiles used to protect spacecraft on reentry to the earth's atmosphere. The coatings can also be applied underneath the tiles of a spacecraft as a safety measure in case a tile is damaged or lost during a flight.
Abstract:
An inlet valve is partially coated with a protective coating to resist corrosion and gas impingement when used in an internal combustion engine. The inlet valve has a hard cladding that is shaped to function as a valve seat. The hard cladding forms an interface with the valve head body, which is typically made of a softer metallic material than the hard cladding. The protective coating is bonded to the inlet valve and covers the cladding-body interface. The protective coating is resistant to corrosion, wear from gas impingement, and can withstand the high temperatures reached in internal combustion engines. A method for making the inlet valves generally includes masking a portion of the valve stem and the valve seat, applying a protective coating to cladding-body interface, and curing the protective coating or otherwise bonding the protective coating to the inlet valve. An apparatus for coating the valves includes a movable track, a plurality of attachment apparatus for holding a plurality of valves on the track, a spraying device for applying the coating, and an infrared lamp for curing the coating.