The Unexpected Formation of MB2 Layers (M = Refractory Metal) on Metal Surfaces
作者： Wibke Friedhoff , Edgar Milke , Michael Binnewies
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摘要: The reactions between refractory metals (Ti, Zr, V, Nb, Ta, Mo, W) and BCl3 vapour at high temperatures have been studied. For this purpose, the metal wires were heated up by an electrical current in a atmosphere for couple of hours. Optical X-ray diffraction methods used to analyze solid products, whereas mass spectrometry was study gas phase composition. In with Ti, Nb we observed formation MB2 layers on surfaces. Molybdenum reacted MoB, tungsten no reaction all. This is contrary thermodynamic expectations. mechanism coating process discussed from viewpoint.
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