Kennametal Inc.

Rodrigo Alejandro Cooper

Peter Rudolf Leicht

Yixiong Liu

Zhenyu Liu

Karl Heinz Wendt

Mark S Greenfield

Volkmar Sottke

Bhaskar Alok

Hartmut Westphal

Debangshu Banerjee

Chen Chen

In one aspect, articles are described comprising wear resistant coatings employing composite architectures including refractory layers of varying compositions and phases. Briefly, a coated article comprises a substrate and a coating deposited by chemical vapor deposition (CVD) adhered to the substrate, the coating comprising an inner refractory layer comprising MAlN wherein x&#x2265;0.7 and M is titanium, chromium or zirconium and an outer zirconia layer or outer multiphase refractory layer comprising an alumina phase and an oxide phase comprising at least one Group IVB metal, wherein the MAlN has less than 15 weight percent hexagonal phase.

CVD composite refractory coatings and applications thereof

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

In one aspect, articles are described comprising wear resistant coatings employing one or more composite refractory layers. For example, a coated article described herein comprises a substrate and a coating deposited by CVD adhered to the substrate, the coating including a multiphase refractory layer comprising an alumina phase and a zirconia phase, wherein the zirconia phase has a texture coefficient for the (200) growth direction, TC(200), greater than 4.

Composite refractory coatings and applications thereof

A coated cutting insert for a chipforming material removal operation wherein the coated insert has a substrate and a coating scheme on the substrate. The coating scheme includes a CVD transition coating layer. The coating scheme further includes a CVD multi-layered coating scheme having a plurality of coating sets. Each one of the coating sets has an aluminum oxide coating layer and a nitrogen-containing coating layer.

CVD coated cutting insert and method of making the same

A CVD-coated article has a substrate with a substrate surface and a CVD coating scheme on the substrate surface. The coating scheme includes a coating layer of TiMenitride wherein Me is selected from the group of zirconium or hafnium or a mixture of zirconium and hafnium, and x equals between about 0.1 and about 0.9. The coating layer of TiMenitride has a microhardness equal to between about 2300 HV0.05 and about 2600 HV0.05, a face centered cubic crystal structure, and a lattice constant equal to between about 0.427 nanometers and about 0.453 nanometers.

CVD-coated article and CVD process of making the same

A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAlOcoating layer wherein the TiAlOcoating layer is deposited using chemical vapor deposition from a gaseous composition including AiCl, H, TiCl, COand HCl.

[object Object]

In one aspect, articles are described comprising refractory coatings employing nanocomposite architectures. Articles having such refractory coatings, in some embodiments, are suitable for high wear and/or abrasion applications such as metal cutting operations. A coated article described herein comprises a substrate and a coating deposited by CVD adhered to the substrate, the coating including a refractory layer having a matrix phase comprising alumina and a nanoparticle phase contained within the matrix phase, the nanoparticles phase comprising crystalline nanoparticles formed of at least one of a carbide, nitride or carbonitride of a Group IVB metal.

Nanocomposite refractory coatings and applications thereof

A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAlOcoating layer wherein the TiAlOcoating layer is deposited using chemical vapor deposition from a gaseous composition including AlCl, H, TiCl, COand HCl.

In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising a polycrystalline layer of TiZrAlO.

Coatings for cutting tools

In one aspect, coated cutting tools are described herein. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating comprising at least one composite layer deposited by chemical vapor deposition, the composite layer comprising an aluminum oxynitride phase, a metal oxide phase including zirconium oxide, a zirconium sulfur nitride phase and a metal oxynitride phase in addition to the aluminum oxynitride phase, the metal oxynitride phase comprising zirconium oxynitride.

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Latrobe, PA, United States of America

Rodrigo Alejandro Cooper