STABILITY OF TWO–DIMENSIONAL SURFACE NITRIDES ON TRANSITION METAL ALLOY SURFACES

Elmarie C. Viljoen and Christian Uebing
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Elmarie C. Viljoen: Max-Planck-Institut für Eisenforschung, Postfach 140 444, D-40074 Düsseldorf, Germany
Christian Uebing: Max-Planck-Institut für Eisenforschung, Postfach 140 444, D-40074 Düsseldorf, Germany

Surface Review and Letters (SRL), 1997, vol. 04, issue 04, 601-606

Abstract: The thermal stability of the two-dimensional surface nitrides CrN, MoN and WN has been studied on transition metal alloy surfaces. The surface nitrides are obtained by means of cosegregation of the constituents on Fe–15%Cr–N(100), Fe–3.5%Mo–N(100) and Fe–9%W–N(100) single crystals. The stability of the surface nitrides decreases in the sequence Cr>Mo>W, similar to the well-known three-dimensional bulk nitrides. All compounds exhibit1×1LEED structures, indicating epitaxial stabilization on the corresponding substrate surface. In a narrow temperature rangeT≈550°C the Fe–9%W–N(100) surface showsc(2×2)ordering of the segregated nitrogen atoms.

Keywords: 68; 68.55.-a; 68.55.Nq; 68.65.+g (search for similar items in EconPapers)
Date: 1997
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DOI: 10.1142/S0218625X97000584

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