Focusing on the serious volatilization of MoO3 in super austenitic stainless steel with a high Mo content, influence B formation oxide film and distribution Cr was investigated at 900 °C 1000 °C. Without addition B, tends to diffuse surface, forming porous Cr/Mo-rich oxides, causing Mo. The can inhibit diffusion facilitate surface combines O, providing conditions for nucleation Cr2O3. A large a...

We report on growth and electrical properties of α-Ga2O3 films prepared by halide vapor phase epitaxy (HVPE) at 500 °C α-Cr2O3 buffers predeposited sapphire magnetron sputtering. The showed a wide microcathodoluminescence (MCL) peak near 350 nm corresponding to the bandgap sharp MCL line 700 due Cr+ intracenter transition. Ohmic contacts Cr2O3 were made with both Ti/Au or Ni, producing linear c...

Abstract Studying cleavage properties of protective oxide scales is imperative to understand their fracture behaviour, since transgranular observed in many cases. The small thickness and polycrystalline structure such makes it difficult identify active planes directly from mechanical testing. To resolve this issue for Cr2O3, we present an approach experimentally through micro-cantilever bending...

B substituting O in antiferromagnetic Cr2O3 is known to increase the Néel temperature, whereas actual dopant site and corresponding functionality remains unclear due complicated local structure. Herein, A combination of electron energy loss spectroscopy first-principles calculations were used unveil structures doped thin films. was found form either magnetic active BCr4 tetrahedra or various in...

Owing to their combination of high hardness and increased fracture toughness, CrTaN coatings have recently gained increasing interest as suitable candidates for metal cutting applications. However, up now, the detailed mechanisms underlying oxidation this promising coating system are not thoroughly understood. Thus within work, evolution microstructure phase composition a cathodic arc evaporate...

First-principles calculations are used to explore the possibility of enhancing the Néel temperature T N of the magnetoelectric antiferromagnet Cr 2 O 3 by substitutional doping. We describe the electronic structure of transition metal (V, Ti, Mn, Fe, Co, and Ni) and anion (N and B) impurities and evaluate their effect on the exchange interaction. We find that, although transition-metal impuriti...

Magnetoelectric force microscopy (MeFM) is characterized as methodical tool for the investigation of antiferromagnetic domain states, in particular of the 180 ∘ variety. As reference compound for this investigation we use Cr 2 O 3 . Access to the antiferromagnetic order is provided by the linear magnetoelectric effect. We resolve the opposite antiferromagnetic 180 ∘ domain states of Cr 2 O 3 an...