Patents by Inventor Peter Rudolf Leicht

Peter Rudolf Leicht has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180274091
    Abstract: CVD Alumina coating has been one of the most important materials for wear resistant application for many years. Recently, texture control in ?-Al2O3 has 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 H2S on the texture in CVD ?-Al2O3 coatings has been investigated. It has been shown that without the addition of H2S, the crystal orientation in the Al2O3 coatings 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 H2S 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 Al2O3 surface and the H2S.
    Type: Application
    Filed: March 20, 2018
    Publication date: September 27, 2018
    Inventors: Chen Chen, Zhenyu LIU, Peter Rudolf LEICHT, Rodrigo Alejandro COOPER
  • Patent number: 9890084
    Abstract: In one aspect, articles are described herein comprising refractory coatings employing alumina-based hybrid nanocomposite architectures. A coated article described herein comprises a substrate and a coating deposited by CVD adhered to the substrate, the coating including a composite refractory layer having a matrix phase comprising alumina and at least one particulate phase within the matrix phase, the particulate phase comprising nanoscale to submicron particles formed of at least one of an oxycarbide and oxycarbonitride of one or more metals selected from the group consisting of aluminum and Group IVB metals.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: February 13, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
  • Publication number: 20170356091
    Abstract: Cutting tools are described having coatings which can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein has a substrate and a coating with a plurality of alternating layers of a first layer of Al2O3 and a second layer of at least one of MeAl2O3 and MeAl2O3/MeO2 composite, wherein Me is Zr, Hf, Ti or a combination thereof. The coating has a superlattice-like structure.
    Type: Application
    Filed: June 23, 2017
    Publication date: December 14, 2017
    Inventors: Zhenyu LIU, Peter Rudolf LEICHT, Yixiong LIU
  • Patent number: 9764986
    Abstract: In one aspect, articles employing CVD coatings deposited at low temperatures are described herein. Briefly, a coated article described herein comprises a substrate and a refractory coating adhered to the substrate, the refractory coating including a layer of TiN deposited by thermal CVD, the layer of TiN having an average crystallite size of 0.05 ?m to 0.5 ?m and residual tensile stress of 100 MPa to 700 MPa.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 19, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
  • Patent number: 9719175
    Abstract: Cutting tools are described having coatings which can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein has a substrate and a coating with a plurality of alternating layers of a first layer of Al2O3 and a second layer of at least one of MeAl2O3 and MeAl2O3/MeO2 composite, wherein Me is Zr, Hf, Ti or a combination thereof. The coating has a superlattice-like structure.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 1, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
  • Patent number: 9650714
    Abstract: 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.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: May 16, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Yixiong Liu
  • Publication number: 20170096372
    Abstract: In one aspect, articles are described herein comprising refractory coatings employing alumina-based hybrid nanocomposite architectures. A coated article described herein comprises a substrate and a coating deposited by CVD adhered to the substrate, the coating including a composite refractory layer having a matrix phase comprising alumina and at least one particulate phase within the matrix phase, the particulate phase comprising nanoscale to submicron particles formed of at least one of an oxycarbide and oxycarbonitride of one or more metals selected from the group consisting of aluminum and Group IVB metals.
    Type: Application
    Filed: October 1, 2015
    Publication date: April 6, 2017
    Inventors: Zhenyu LIU, Peter Rudolf Leicht, Yixiong Liu
  • Publication number: 20160215387
    Abstract: In one aspect, articles employing CVD coatings deposited at low temperatures are described herein. Briefly, a coated article described herein comprises a substrate and a refractory coating adhered to the substrate, the refractory coating including a layer of TiN deposited by thermal CVD, the layer of TiN having an average crystallite size of 0.05 ?m to 0.5 ?m and residual tensile stress of 100 MPa to 700 MPa.
    Type: Application
    Filed: January 22, 2015
    Publication date: July 28, 2016
    Inventors: Zhenyu LIU, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
  • Patent number: 9365925
    Abstract: 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 described herein comprises a substrate and a coating adhered to the substrate, the coating having a multilayer structure including a plurality of structural units each comprising a bonding layer and an adjacent alumina layer, the alumina layer having a thickness of less than 0.5 ?m and the bonding layer having a thickness less than 1 ?m, the bonding layer comprising TiCN and TiAlOC.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: June 14, 2016
    Assignee: KENNAMETAL INC.
    Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S Greenfield, Yixiong Liu
  • Publication number: 20160160347
    Abstract: 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.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 9, 2016
    Inventors: Zhenyu LIU, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Yixiong Liu
  • Publication number: 20160090654
    Abstract: Cutting tools are described having coatings which can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein has a substrate and a coating with a plurality of alternating layers of a first layer of Al2O3 and a second layer of at least one of MeAl2O3 and MeAl2O3/MeO2 composite, wherein Me is Zr, Hf, Ti or a combination thereof. The coating has a superlattice-like structure.
    Type: Application
    Filed: September 30, 2014
    Publication date: March 31, 2016
    Applicant: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
  • Patent number: 9181620
    Abstract: 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 at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Patent number: 9181621
    Abstract: 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 TiZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9028953
    Abstract: CVD coated cutting tools are provided. A coated cutting tool described herein, in some embodiments, comprises a PcBN substrate and a polished coating adhered to the substrate including one or more layers of Al2O3 deposited by chemical vapor deposition, wherein the coating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a workpiece.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: May 12, 2015
    Assignee: Kennametal Inc.
    Inventors: Frank Barry Battaglia, Crystal Jane Nestor, Peter Rudolf Leicht, Kent Lewis Reiner, Charles Graham McNerny
  • Publication number: 20140291036
    Abstract: 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 described herein comprises a substrate and a coating adhered to the substrate, the coating having a multilayer structure including a plurality of structural units each comprising a bonding layer and an adjacent alumina layer, the alumina layer having a thickness of less than 0.5 ?m and the bonding layer having a thickness less than 1 ?m, the bonding layer comprising TiCN and TiAlOC.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: Kennametal Inc.
    Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140287229
    Abstract: 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 at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Publication number: 20140287199
    Abstract: 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 TiZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140199130
    Abstract: CVD coated cutting tools are provided. A coated cutting tool described herein, in some embodiments, comprises a PcBN substrate and a polished coating adhered to the substrate including one or more layers of Al2O3 deposited by chemical vapor deposition, wherein the coating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a workpiece.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 17, 2014
    Applicant: Kennametal Inc.
    Inventors: Frank Barry Battaglia, Crystal Jane Nestor, Peter Rudolf Leicht, Kent Lewis Reiner, Charles Graham McNerny