A new analytical (i.e., without computer modeling) method for calculating the dependence of melting temperature T m a single-component crystal on pressure P is proposed. The based delocalization criterion and does not contain fitting constants. baric dependences (P) its derivative T' gold, platinum niobium in range: P=0-1000 GPa were calculated by this method. It was shown that gold agree bette...

In recent times there has been a growing interest in the development of quasi-two-dimensional niobium pentoxide (Nb2O5) as a semiconductor for the potential electronic applications such as capacitors, filtration, dye-sensitised solar cells and gas sensing platforms. Therefore once the purpose is established, Nb2O5 can be prepared in a number of nanoand sub-micron-structural morphologies that in...

We report a simple method for the fabrication of Niobium superconducting (SC) tips for scanning tunnelling microscopy which allow atomic resolution. The tips, formed in-situ by the mechanical breaking of a niobium wire, reveal a clear SC gap of 1.5 meV and a critical temperature Tc =9.2±0.3 K, as deduced from Superconductor Insulator Normal metal (NIS) and Superconductor Insulator Superconducto...

Austenite grain growth in microalloyed steels is governed by the coarsening of fine precipitates present at grain boundaries below the grain coarsening temperature. Zener model is widely used in metals to describe the pinning effect of second phase particles precipitated in the matrix. In this work it has been discussed whether grain boundary or volume diffusion is the rate controlling process ...

This study investigates the thermal conductivity Κ of polycrystalline niobium. We recall that superconducting cavities for particle accelerators are made of niobium. And, the thermal conductivity Κ is one of the factors which play an important role in the cooling of these cavities by the surrounding superfluid helium bath. Our experiments revealed a rather unexpected discrepancy in the thermal ...

Mo-Si-B intermetallics consisting of the phases Mo3Si and Mo5SiB2, and a molybdenum solid solution (“ -Mo”), have melting points on the order of 2000 °C. These alloys have potential as oxidationresistant ultra-high-temperature structural materials. They can be designed with microstructures containing either individual -Mo particles or a continuous -Mo phase. A compilation of existing data shows...

Recent progress in high-performance computing and data informatics has opened up numerous opportunities to aid the design of advanced materials. Herein, we demonstrate a computational workflow that includes rapid population of high-fidelity materials datasets via petascale computing and subsequent analyses with modern data science techniques. We use a first-principles approach based on density ...