Abstract
Abstract: The high-temperature oxidation behaviour of Si-bearing cobalt-base superalloys has been investigated. Isothermal oxidation tests conducted at 900, 1000, and 1150 °C indicated that silicon addition can improve oxidation resistance. Furthermore, the alloy content of tungsten can have profound impact on the oxidation behaviour; low content of tungsten can promote the formation of protective alumina at temperatures at and above 1000 °C, while high tungsten content can slow down oxidation at 900 °C. Graphical Abstract: [Figure not available: see fulltext.]