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Miracle is concentrating on a cluster of elements in the centre of the periodic table known as the refractory metals. These elements, including molybdenum and niobium, have unusually high melting points around 2500°C, compared with 1455°C for nickel, on which jet engine alloys are now based. […] So far he has shown that high-entropy refractory metal alloys do indeed remain strong at temperatures beyond the wilting point of existing nickel superalloys.

dcterms:bibliographicCitation

2016 October 15, James Mitchell Crow, “Forging Ahead”, in New Scientist‎[1], number 3095, page 37: