Kennametal Inc.

Chen Chen

Zhenyu Liu

Ronald Penich

Vineet Kumar

Nicholas F Waggle, Jr

Peter Rudolf Leicht

Rodrigo Alejandro Cooper

In one aspect, coatings are described herein employing composite architectures providing high aluminum content and high hardness for various cutting applications. For example, a coated cutting tool comprises a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising a plurality of sublayer groups, a sublayer group comprising a titanium aluminum nitride sublayer and an adjacent composite sublayer comprising alternating nanolayers of titanium silicon nitride and titanium aluminum nitride.

Multilayer nitride hard coatings

CVD Alumina coating has been one of the most important materials for wear resistant application for many years. Recently, texture control in &#x3b1;-AlOhas attracted increasing attention due to the possibility to further improve the anisotropic properties such as thermal conductivity and mechanical properties. The influence of process parameters on textures is complex. In the present application, the influence of nucleation surface condition and HS on the texture in CVD &#x3b1;-AlOcoatings has been investigated. It has been shown that without the addition of HS, the crystal orientation in the AlOcoatings is primarily dominated by the nucleation surface condition, whereas the effect of reactant composition on texture is minimal. On the other hand, in the presence of HS during growth, reactant composition also plays an important role in affecting the crystal orientation. This effect is likely due to the strong interaction between the AlOsurface and the HS.

Control and characterization of texture in CVD &#x3b1;-AlOcoatings

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Latrobe, PA, United States of America

Chen Chen