Patents by Inventor Yixiong Liu

Yixiong Liu 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: 20190326120
    Abstract: The present disclosure relates to a method for forming a p-metal work function nitride film having a desired p-work function on a substrate, including: adjusting one or more of a temperature of a substrate, a duration of one or more temporally separated vapor phase pulses, a ratio of a tungsten precursor to a titanium precursor, or a pressure of a reaction to tune a work function of a p-metal work function nitride film to a desired p-work function, and contacting the substrate with temporally separated vapor phase pulses of the tungsten precursor, the titanium precursor, and a reactive gas to form a p-metal work function nitride film thereon having the desired p-work function.
    Type: Application
    Filed: April 11, 2019
    Publication date: October 24, 2019
    Inventors: Guoqiang JIAN, WEI TANG, CHI-CHOU LIN, PAUL MA, YIXIONG YANG, MEI CHANG, WENYI LIU
  • Publication number: 20190242013
    Abstract: 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.
    Type: Application
    Filed: April 17, 2019
    Publication date: August 8, 2019
    Inventors: Rodrigo Alejandro Cooper, Karl Heinz Wendt, Peter Leicht, Bhaskar Alok, Yixiong Liu
  • Patent number: 10273575
    Abstract: 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.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 30, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Rodrigo Alejandro Cooper, Karl Heinz Wendt, Peter Leicht, Bhaskar Alok, Yixiong Liu
  • Patent number: 10272497
    Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: April 30, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Yixiong Liu, James A. Faust, Danie J. De Wet, Sudharsan Subbaiyan, Piyamanee Komolwit, Mark J. Rowe
  • Publication number: 20190106795
    Abstract: In one aspect, coated cutting tools are described herein comprising a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising M1?xAlxN wherein x?0.68 and M is titanium, chromium or zirconium, the refractory layer including a cubic crystalline phase and having hardness of at least 25 GPa.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 11, 2019
    Inventors: Vineet KUMAR, Ronald PENICH, Yixiong LIU
  • Patent number: 10253410
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: April 9, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald M. Penich, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Patent number: 10202686
    Abstract: In one aspect, articles are described herein comprising refractory coatings employing an inter-anchored multilayer architecture. Articles having refractory coatings described herein, 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 comprising a plurality of sublayer groups, a sublayer group comprising a Group IVB metal nitride sublayer and an adjacent layer alumina sublayer, the Group IVB metal nitride sublayer comprising a plurality of nodules interfacing with the alumina sublayer.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: February 12, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Yixiong Liu
  • Patent number: 10184187
    Abstract: In one aspect, coated cutting tools are described herein comprising a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising M1-xAlxN wherein x?0.68 and M is titanium, chromium or zirconium, the refractory layer including a cubic crystalline phase and having hardness of at least 25 GPa.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 22, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald Penich, Yixiong Liu
  • Patent number: 10100405
    Abstract: 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.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: October 16, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Rodrigo A. Cooper, Zhenyu Liu, Peter R. Leicht, Yixiong Liu
  • Patent number: 9994717
    Abstract: 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 Ti1-xMex nitride 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 Ti1-xMex nitride 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.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 12, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Volkmar Sottke, Hartmut Westphal, Karl H. Wendt, Peter R. Leicht, Rodrigo A. Cooper, Yixiong Liu
  • Publication number: 20180057934
    Abstract: 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.
    Type: Application
    Filed: August 31, 2016
    Publication date: March 1, 2018
    Inventors: Rodrigo Alejandro Cooper, Karl Heinz Wendt, Peter Leicht, Bhaskar Alok, Yixiong Liu
  • Patent number: 9903018
    Abstract: 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 TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AiCl3, H2, TiCl4, CO2 and HCl.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 27, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9896767
    Abstract: In one aspect, coated cutting tools are described herein comprising a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising M1-xAlxN wherein x?0.68 and M is titanium, chromium or zirconium, the refractory layer including a cubic crystalline phase and having hardness of at least 25 GPa.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: February 20, 2018
    Assignee: KENNAMETAL INC
    Inventors: Vineet Kumar, Ronald Penich, Yixiong Liu
  • 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
  • Patent number: 9862029
    Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 9, 2018
    Assignee: KENNAMETAL INC
    Inventors: Qingjun Zheng, Yixiong Liu, James A Faust, Mark J Rowe, Danie J De Wet, Sudharsan Subbaiyan, Michael J Meyer
  • Patent number: 9849532
    Abstract: A composite wear pad includes a substrate that is selected from the group of iron based alloys, steel, nickel based alloys, and cobalt based alloys. A hard particle-matrix alloy layer is bonded at a surface to the substrate. The hard particle-matrix alloy layer has a plurality of hard particles dispersed in a matrix alloy. The hard particle-matrix alloy layer has a thickness ranging between greater than about 13 millimeters and about 20 millimeters.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: December 26, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Robert J. Vasinko, 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
  • Publication number: 20170226634
    Abstract: In one aspect, articles are described herein comprising refractory coatings employing an inter-anchored multilayer architecture. Articles having refractory coatings described herein, 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 comprising a plurality of sublayer groups, a sublayer group comprising a Group IVB metal nitride sublayer and an adjacent layer alumina sublayer, the Group IVB metal nitride sublayer comprising a plurality of nodules interfacing with the alumina sublayer.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Inventors: Zhenyu LIU, Yixiong LIU
  • Publication number: 20170218511
    Abstract: A coated cutting insert includes a substrate that is either a ceramic substrate or polycrystalline cubic boron nitride-containing substrate and has a substrate surface.
    Type: Application
    Filed: April 13, 2017
    Publication date: August 3, 2017
    Inventors: Vineet KUMAR, Ronald M. PENICH, Peter R. LEICHT, Mark S. GREENFIELD, Yixiong LIU