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

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

2011-04-12

arxiv.org/abs/1104.2136v1

Appl. Phys. Lett. 98, 081901 (2011)

Physics

Condensed Matter

Materials Science

7 pages, 5 figures

Scientific paper

10.1063/1.3556564

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.

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