High-entropy oxide nanoribbons suitable for extreme environments
High temperature and corrosion stability, as well as high wear resistance and stiffness, are displayed for oxides with five transition metals.
The paper claims this finding allows for the creation of low-dimensional, resilient high-entropy materials.
Researchers prevented phase segregation of the metals by oxidising metal sulphide precursors, explains the paper on Resiliency, morphology and entropic transformations in high-entropy oxide nanoribbons in Nanomaterials.
According to the paper's editor, Phil Szuromi, the resulting metal-oxide nanoribbons are stable in strong acids and bases, at temperatures up to 1,000°C, and pressures up to 12GPa.
Above 30GPa, they undergo a reversible amorphiation transition.
The paper reports that the nanoribbons exhibit ‘notable mechanical properties’, with a modulus of resilience reaching 40MJ/m3.
