Possible routes for synthesis of new boron-rich Fe-B and Fe(1-x)Cr(x)B4 compounds

Abstract

We use ab initio calculations to examine thermodynamic factors that could promote the formation of recently proposed unique oP10-FeB4 and oP12-FeB2 compounds. We demonstrate that these compact boron-rich phases are stabilized further under pressure. We also show that chromium tetraboride is more stable in the new oP10 rather than the reported oI10 structure which opens up the possibility of realizing an oP10-Fe(x)Cr(1-x)B4 pseudobinary material. In addition to exhibiting remarkable electronic features, oP10-FeB4 and oP12-FeB2 are expected to be harder than the known Fe-B compounds commonly used for hard coating applications.

arXiv comment7 pages, 5 figures

References in corpus (5)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Ionic high-pressure form of elemental boron
• New Superconducting and Semiconducting Fe-B Compounds Predicted with an Ab Initio Evolutionary Search
• Theoretical study of metal borides stability
• Possible routes for synthesis of new boron-rich Fe-B and Fe(1-x)Cr(x)B4 compounds

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