Abstract
AbstractNanostructured TiN coatings were prepared by reactive plasma spraying, and the microstructure and the grain morphology of the coatings were analyzed by XRD, SEM and TEM. The results show that the coatings were mainly composed of TiN and Ti3O phases (other phases were not detected), and they had the typical sprayed lamellar structures with few pores being visible. In the planar view, nanoscale grains with particle diameters ranging from 60 to 120 nm were observed in the coatings, and both fine equiaxial and columnar grains were found in some zones of the coatings. But in the cross‐sectional view, the TiN coatings were mainly composed of columnar grains, with no qualities of equiaxial grains being found. Thus, it can be concluded that the TiN coatings are composed of columnar grains, and the columnar grains are nanostructural, equiaxial grains in their cross‐section. Copyright © 2007 John Wiley & Sons, Ltd.
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