Thermal Barriers

Thermal Barrier Coatings are designed to reduce the transfer of heat through a substrate material. By using thermal barrier coatings, we can effectively manage the transfer of heat and help guide it in the direction we want it to go. Being able to move and control heat is of tremendous importance. Excessive temperature can lead to metal fatigue, boiling fluids, damaging metal expansion, reduce electrical efficiency and a host of other problems. Traditionally dealing with heat has been handled either by expanding the radiating surface, constructing parts from materials that are more heat conductive and using the color black. With advances in thermal management methods additional ways of enhancing heat transfer now exist.

Individual types of thermal dispersant coatings can be utilized by themselves or in conjunction with other coatings to manage the flow of heat. Thermal dispersants are capable of transferring heat faster than the bare metal surface. While thermal dispersant coatings do make use of the color black, it is more than a simple “black body” heat emitting coating. They include ingredients that also contribute to increased heat flow. Combining these properties with increased corrosion protection and thin film application techniques help to maximizes thermal transfer capabilities.

In exhaust systems, for example, where ceramic metallic thermal barrier coatings are applied, we are better able to keep heat within the exaust system where it belongs.  In doing so, we increase the velocity at wich the exhaust gases travel through the system.  This reduces back pressure on the engine and results in an increase in horsepower, torque, and fuel economy.  Thermal dispersant coatings are also effective on brake system components, engine intake manifolds, cylinder Heads, oil pans, radiators, turbochargers, intercoolers and more.

Thermal barrier coatings are ususally made up of a combination of ceramic and aluminum powders, bound together in a liquid formulation.  A variety of ceramic metallic thermal barriers are available on the market and you should choose one that is designed for your specific application.  Check with a ceramic coatings applicatior near you, or contact the Ceramic Coatings Institute where you can speak to a Certified Applicator about your needs, and you can be directed to an applicator near you.