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).
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Patent number: 10865476Abstract: 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: GrantFiled: March 20, 2018Date of Patent: December 15, 2020Assignee: KENNAMETAL INC.Inventors: Chen Chen, Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper
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Publication number: 20200255941Abstract: In one aspect, carrier bodies and associated apparatus are described herein for supporting cutting tools during a CVD process. Carrier bodies and associated apparatus, in some embodiments, can facilitate proper placement and orientation of cutting tools on reactor trays while minimizing contact marks. Briefly, a carrier body comprises a base, a guide element opposite the base, and convex ridges for supporting one or more cutting tools during a chemical vapor deposition coating process.Type: ApplicationFiled: February 11, 2019Publication date: August 13, 2020Inventors: Debangshu BANERJEE, Peter Rudolf Leicht
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Patent number: 10570521Abstract: 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: GrantFiled: June 23, 2017Date of Patent: February 25, 2020Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
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Publication number: 20180274091Abstract: 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: ApplicationFiled: March 20, 2018Publication date: September 27, 2018Inventors: Chen Chen, Zhenyu LIU, Peter Rudolf LEICHT, Rodrigo Alejandro COOPER
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Patent number: 9890084Abstract: 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: GrantFiled: October 1, 2015Date of Patent: February 13, 2018Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
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Publication number: 20170356091Abstract: 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: ApplicationFiled: June 23, 2017Publication date: December 14, 2017Inventors: Zhenyu LIU, Peter Rudolf LEICHT, Yixiong LIU
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Patent number: 9764986Abstract: 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: GrantFiled: January 22, 2015Date of Patent: September 19, 2017Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
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Patent number: 9719175Abstract: 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: GrantFiled: September 30, 2014Date of Patent: August 1, 2017Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
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Patent number: 9650714Abstract: 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: GrantFiled: December 8, 2014Date of Patent: May 16, 2017Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Yixiong Liu
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Publication number: 20170096372Abstract: 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: ApplicationFiled: October 1, 2015Publication date: April 6, 2017Inventors: Zhenyu LIU, Peter Rudolf Leicht, Yixiong Liu
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Publication number: 20160215387Abstract: 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: ApplicationFiled: January 22, 2015Publication date: July 28, 2016Inventors: Zhenyu LIU, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
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Patent number: 9365925Abstract: 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: GrantFiled: March 27, 2014Date of Patent: June 14, 2016Assignee: KENNAMETAL INC.Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S Greenfield, Yixiong Liu
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Publication number: 20160160347Abstract: 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: ApplicationFiled: December 8, 2014Publication date: June 9, 2016Inventors: Zhenyu LIU, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Yixiong Liu
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Publication number: 20160090654Abstract: 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: ApplicationFiled: September 30, 2014Publication date: March 31, 2016Applicant: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Yixiong Liu
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Patent number: 9181620Abstract: 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: GrantFiled: March 20, 2014Date of Patent: November 10, 2015Assignee: KENNAMETAL INC.Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
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Patent number: 9181621Abstract: 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: GrantFiled: March 20, 2014Date of Patent: November 10, 2015Assignee: KENNAMETAL INC.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
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Patent number: 9028953Abstract: 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: GrantFiled: January 11, 2013Date of Patent: May 12, 2015Assignee: Kennametal Inc.Inventors: Frank Barry Battaglia, Crystal Jane Nestor, Peter Rudolf Leicht, Kent Lewis Reiner, Charles Graham McNerny
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Publication number: 20140291036Abstract: 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: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicant: Kennametal Inc.Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S. Greenfield, Yixiong Liu
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Publication number: 20140287229Abstract: 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: ApplicationFiled: March 20, 2014Publication date: September 25, 2014Applicant: Kennametal Inc.Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
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Publication number: 20140287199Abstract: 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: ApplicationFiled: March 20, 2014Publication date: September 25, 2014Applicant: Kennametal Inc.Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu