Case 15106

Production of PVD Coatings Based on Nb(CN)

Keywords:

Physical vapor deposition (PVD), Coatings, Niobium Carbide, Niobium Carbonitrides, Nanocomposites, Nickel, Grain Refining

Applications:

Industrial cutting or forming tools, as well as other wear-resistant mechanical components.

Problem:

Need for harder, tougher, and coatings with properties that can be tailored according a given application, considering the wear mechanism, aiming at a better performance in tool applications.

Technology:

This invention uses the traditional Physical Vapor Deposition method to create coatings with pure niobium carbide (NbC), niobium carbonitride (NbCN) and NbC particles distributed in a ductile nickel matrix. Hard coatings were produced by optimizing the PVD variables on sputtering NbC, as well as by creating a nanocomposite with grains of a few nanometer size when NbC and Ni were co-sputtered. Additions of N were used to control the hardness and the physical properties of NbC coatings.

Advantages:
  • New combinations of hardness, toughness, and physical properties to enable coatings with better performance in industrial tooling applications.
  • PVD is an established technique, suitable to a variety of substrates and industrial applications.

Inventors:
  • Professor Christopher Schuh (Department of Material Sciences and Engineering, MIT)
  • Dr. Rafael Mesquita (Department of Material Science and Engineering, MIT)

Intellectual Property:

US Patent Application 61/581438 filed on 12/29/2011

Publications:

Rafael A Mesquita and Christopher A. Schuh, Niobium Carbide and Carbonitride Coatings Produced by Physical Vapor Deposition. To be submitted.

Rafael A Mesquita and Christopher A. Schuh, Nanocomposite PVD Coatings based on Niobium Carbide and Nickel. To be submitted.

Last revised: February 4, 2012

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