Resources, Volume 9, Issue 9 (September 2020) – 17 articles
Cover Story (view full-size image): Nickel-based superalloys allow higher combustion temperatures in the gas turbine and, thus, higher fuel efficiency and lower CO2 emissions of jet engines. A semi-quantitative assessment scheme is used to evaluate the relative supply risks associated with elements contained in various Ni-based superalloys. The supply risks for rhenium, molybdenum, and cobalt are found to be the highest. The introduction of rhenium as a component starting with second-generation single crystal alloys developed in the 1980s is the main reason for higher supply risks in the cost-share aggregation scheme. The resulting higher supply risk appears, however, to be acceptable for jet engine applications. View this paper
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