Abstract
Abstract The characteristic features of TiN interlayers were investigated in three different materials: firstly TiN-coated C-fibres of the high-tensile-strength type in pure Mg; secondly TiN-coated fibres in a Mg alloy containing 5wt% Al (AM50); thirdly, for comparison, the latter alloy reinforced with the uncoated fibres. The results were obtained using high-voltage electron microscopy, high-resolution electron microscopy, energy-filtered transmission electron microscopy and scanning transmission electron microscopy in combination with energy-dispersive X-ray spectroscopy and electron-energy-loss spectroscopy, including analyses of near-edge fine structures. The chemically vapour-deposited coating was proven to consist partly of a nanocrystalline titanium carbonitride (TiC x N y ) rather than of titanium nitride (TiN). It varies in thickness mainly between 10 and 30 nm. In the composite with the pure Mg matrix, the interfacial structure is characterized by an almost stringent separation of matrix and fib...
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