Self-formation of compositionally complex surface oxides on high entropy alloys observed by accelerated atom probe tomography: a route to sustainable catalysts.

Sustainable catalysts rely on abundant elements which are prone to oxidation. A route to non-noble electrocatalysts is opened by directing the formation of unavoidable surface oxides towards creating a few atomic layers of an active and stable electrocatalyst, which is in direct contact with its metallic, conducting support. This is enabled by combining possibilities of compositionally complex solid solutions with accelerated atomic-scale surface characterization.

A modified technique to determine the tear energy of impression materials.

A modified method to determine tear energy of impression materials is described. Trousers-shaped specimens were prepared between two platens. They are different from those used before in that a V-shaped line is created so as to guide tear growth, and the thickness gradually increases, then remains constant and, ultimately, decreases instantaneously.

Phenomenological model of creep of dental amalgam.

Earlier work revealed that creep of a particular dental amalgam can be described by the model F(t) = F0 exp (t/t0)m. Here F(t) is the creep compliance at time t, whereas F0, t0 and m are constants of the model. In the previous study only three alloys were used.