Boundary magnetization properties of epitaxial Cr2−xAlxO3 thin films" The magnetoelectric antiferromagnet α-Cr 2 O 3 (chromia) is known to possess a roughness insensitive net equilibrium magnetization at the (0001) surface, called boundary magnetization (BM), which is coupled to the bulk antiferromagnetic order parameter. In order to verify whether this symmetry sensitive BM persists in alloys,...

Two TaC-strengthened cobalt-based alloys, with compositions Co-10Cr-0.25C-4.4Ta and Co-10Cr-0.5C-8.7Ta (wt.%) underwent Cr-deposition by pack-cementation, followed by heat-treatment to allow Cr diffusing deeper in their sub-surface. Thereafter they were tested for 50 hours at 1200°C in a thermobalance. These alloys were successfully enriched in chromium, with a maximal content on surface of abo...

Abstract Coatings prepared from chromia-rich (Al,Cr) 2 O 3 solid solution (ss) feedstock powders are intended to improve the properties of Cr coatings, but rarely studied so far. In this work, processability a commercial powder containing 78 wt.% by atmospheric plasma spraying (APS), corresponding coating microstructures and were investigated. Possible further improvements expected blending wit...

The oxidation properties of a family novel polycrystalline Ni-based superalloys with varying Ti:Nb ratio have been studied, which has shown correlation between increasing titanium content and accelerated kinetics. High-resolution characterization microstructure chemistry was carried out on the resultant oxide layers using SEM/EDX Atom Probe Tomography to precisely locate Ti segregation within c...

Abstract Three FeCrAl alloys and two chromia-formers (a stainless steel, a Ni-base alloy) have been exposed in four environments (dry air, air + 20% H 2 O, O Ar 95% N 5% ) for 168 h at 800 °C. The corroded samples were investigated by SEM/EDS, XRD gravimetry, the formation of CrO (OH) (g) was measured as function time using denuder technique. Fe-base alloy formed Cr-rich protective oxide scale ...