An engineering research team at the University of Alberta has identified a new material for coatings that offers promise for high-temperature applications like hydrogen combustion engines.
The coating is made from a new super alloy composed of metals such as aluminum and nickel. Known as a complex concentrated alloy, the new material is ideal for coating surfaces that must withstand high temperatures, such as in gas turbines, power stations, vehicle and airplane engines.
The newly developed alloy—AlCrTiVNi5—has superior thermomechanical properties that include high stability, low expansion, fracture tolerance, and a valuable combination of strength and ductility—which make it able to stand up in high-heat and high-pressure environments.
The study, "A novel entropy-stabilized oxide coating thermally grown from a valve metal-based complex concentrated alloy," is published in Materials Today.
When compared with existing commercially available alloys used as coatings in high-temperature applications, the new coating material stands up better than anything else, according to project supervisor Jing Liu, assistant professor in the Department of Chemical and Materials Engineering. It could prove important for use in hydrogen engines.
To read more, click here.