What is it about?

How boron forms borides with electropositive elements i.e., most metals

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Why is it important?

Bulk ZrB2: ultrahigh temperature applications, hypersonic airplane protective shields for hypersonic space vehicles, atmospheric reentry, rocket propulsion. Thin film ZrB2/TiB2: for machining of Al alloys in automobile, aerospace industry, telecommunications industries, hard coatings for cutting tool applications Thin film ZrB2 is a potential high-temperature electrical contact material with better ductility compared to ZrC and ZrN. Thin film ZrB2 2D boridene; compare to graphene and MXene

Perspectives

Thin films provide better means than bulk to study the composition dependent chemical bonding and hybridization as a function of boron content Thin film experimental electronic structure studies of the Zr-Zr, Zr-B chemical bonding has been lacking The local short-range order atomic coordination symmetry can be probed with XANES and EXAFS that are complementary tools to long-range order XRD XANES gives quantitative average oxidation state, information about coordination symmetry EXAFS gives quantitative average bond length, coordination number, mean-square disorder

Associate Prof. Martin Magnuson
Department of Physics, Chemistry and Biology (IFM)

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This page is a summary of: Chemical bonding in epitaxial ZrB 2 studied by X-ray spectroscopy, Thin Solid Films, March 2018, Elsevier, DOI: 10.1016/j.tsf.2018.01.021.
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