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Experimental and First Principles Study of the Ni-Ti-W System

Nickel based superalloys are structural materials with a chemical composition and structure which has been developed to enable good high temperature performances leading to a wider range of applications. Their unique properties are due to their microstructure characterized by the coexistence of L12-ordered intermetallic precipitates like Ni3Al or Ni3Ti - γ’ phase - in a facecentered cubic nickel base...

First Principles calculations and experiments for Cu-Mg/Li hydrides negative el...

ANTI-PEROVSKITE SOLID ELECTROLYTE COMPOSITIONS / COMPOSITIONS D'ÉLECTROLYTE SO...

Hydrides of Cu and Mg Intermetallic Systems: Characterization, Catalytic Functi...

Study of the Cu–Li–Mg–H system by thermal analysis

New Promising Hydride Based on the Cu-Li-Mg System

We investigated the ternary Cu-Li-Mg system, in particular the CuLixMg2-x (x = 0.08) for hydrogen storage. Instead of crystallizing in an orthorhombic phase, as CuMg2, this phase presents a hexagonal structure very similar to that of NiMg2 and NiMg2H0.3. In this work we will discuss the structure of CuLixMg2-x by the analysis of the neutron scattering data and first principles calculations. The first results fo...

Neutron powder diffraction and first-principles computational studies of CuLi(x...

Phase transitions in the Cu-Sb-S system

The aim of this study is to determine the thermodynamic influence of the presence of Cu3SbS3, Cu2S and Sb2S3 in the formation of Cu12Sb4S13 - equivalent to mineral tetrahedrite. Thus, the Cu-Sb-S system is studied. Twenty three samples, with compositions that essentially lay along the vertical section Cu2S-Sb2S3, were prepared. The samples were analyzed by Electron Microprobe (EPMA) in order to determine the ro...

Simulation of the spinodal phase separation dynamics of the Bi–Zn system

In the phase separation occurring at the miscibility gap (at the spinodal region) of an alloy a discrete symmetry is spontaneously broken and a domain wall network is formed. Field theory simulations are often used to study the dynamics of topological defects networks appearing in different physical contexts. In this work, we focus on the dynamics of the two immiscible liquids appearing on the phase diagram of ...

Estudo de secções verticais do sistema Cu-Li-Mg por calorimetria diferencial de...