Photo Credit: University of Nottingham
A materials expert at the University of Nottingham (Nottingham, England) has secured over £2.1m to develop new coatings for use in aerospace that could cut jet plane CO
2 emissions and help spacecraft built for humans venture further into our solar system.
Dr. Tanvir Hussain, of the university, has received the five-year fellowship funded by the Engineering and Physical Sciences Research Council to find new modeling and processing techniques that will overhaul the design and manufacture of advanced ceramic materials for the next generation of air and space travel.
Dr. Hussain, from the Coatings and Surface Engineering Research group, explains, “Ceramics are an important group of materials and their processing into aerospace coatings and components requires specialist techniques. Current approaches for new materials discovery and production are wasteful, costly and energy inefficient.”
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SUMMARY
Electrolytic codeposition is a promising alternative low-cost process for fabricating MCrAlY coatings. In this process, CrAlY particles are codeposited with the (Ni,Co) to form an (Ni,Co)-CrAlY composite coating, which is subsequently heat treated at elevated temperatures to be transformed to the MCrAlY coating containing phases of β-NiAl, γ-(Ni,Co), etc. Two types of CrAlY-based particles (made by ball milling and gas atomization) were employed. The effects of several key processing parameters, such as current density, particle loading, and particle size/shape density, on the CrAlY particle incorporation in the electrodeposited (Ni,Co)-CrAlY coatings were studied. For the ball-milled CrAlY powder, an increase in current density led to a decrease in particle incorporation, whereas for the gas-atomized CrAlY powder the current density showed a negligible influence on particle incorporation. The relationship of particle incorporation and particle loading followed t