An optimal integration of modern computational tools and efficient experimentation is presented for the accelerated design of Nbbased superalloys. Integrated within a systems engineering framework, we have used ab initio methods along with alloy theory tools to predict phase stability of solid solutions and intermetallics to accelerate assessment of thermodynamic and kinetic databases enabling ...

We experimentally show that half-metallic Co2MnSi films can be grown on SrTiO3(001) at around 350 °C by molecular beam epitaxy. Despite relatively low-temperature films, L21-ordered structures, high saturation magnetic moments of ?5.0 ?B/f.u., and the negative sign anisotropic magnetoresistance (AMR) indicating nature are obtained. For 350°C-grown a low Gilbert damping constant ?0.0035, implyin...

In this study, exchange bias effect was investigated in boron added NiMnSb Heusler alloys. The samples were fabricated by arc melting method with Ni49Mn37,5Sb13,5+Bx, Ni49Mn37,7Sb13,3+Bx and Ni49Mn37,9Sb13,1+Bx nominal compositions. XRD analyzes showed that the L21 crystal structure at room temperature. While martensitic phase transition temperatures increased, magnetic moment value decreased i...

In the present study, polycrystalline Co50V34Ga16?xFex (1?x?2) quaternary Heusler alloys were fabricated by arc-melting method. It was found that they undergo a paramagnetic martensitic transformation (MT) from L21-type cubic austenitic structure to D022 tetragonal structure. With increase of Fe concentration, MT shifts towards higher temperature range, which is strongly related variation valen...

The hysteresis that occurs during superelasticity caused by the stress-induced first-order martensite transformation is sometimes detrimental to properties of superelastic materials. In this paper, first-principles calculations are performed systematically investigate effects chemical composition and crystal disorder on Ni50-xCoxM25Ga25 (M = Mn, Fe) Heusler alloys. Calculations stress-strain re...

Nitrogen (N2) fixation rates were determined on bulk water collected in the Gulf of Aqaba, Red Sea, during fall (stratified, oligotrophic) and spring (deep mixing, mesotrophic) seasons. N2 fixation rates were low yet consistently measurable in both seasons, and maximum rates of 1.0 6 0.1 nmol N L21 d21 and 1.9 6 0.2 nmol N L21 d21 occurred in the fall and spring, respectively. Amendment with in...