Patents by Inventor Yuanhu HU

Yuanhu HU 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).

  • COATING MATERIALS FOR DIFFUSING INTO MAGNET OF NdFeB AND A METHOD OF MAKING IT
    Publication number: 20240062954
    Abstract: The application discloses a coating material for fabricating rare earth magnets and a method using the coating material to prepare neodymium-iron-boron (NdFeB) magnets having high coercive force. The coating material includes alloy powder A and low-melting-point metal powder B. The alloy powder A is heavy rare earth element R powder, or rare earth-metal alloy (RM) powder, or rare earth-metal-hydrogen alloy (RMH) powder. The heavy rare earth elements are Dy and/or Tb, metal is Fe or Co, or an alloy of Fe and Co, and H is hydrogen element. The low-melting-point metal powder B is one or two of Zn, Al, and Ga. The preparation method includes the following steps: the coating material is mixed into a slurry, and the slurry is coated on the surface of NdFeB magnet, and then apply a two-stage diffusion heat treatment to the magnet, followed by an annealing process to obtain a high-coercivity NdFeB magnet.
    Type: Application
    Filed: November 1, 2023
    Publication date: February 22, 2024
    Inventors: Feng XU, Meng LONG, Shimao SHEN, Yuanhu HU
  • Coating materials for diffusing into magnet of NdFeB and a method of making it
    Patent number: 11848152
    Abstract: The application discloses a coating material for fabricating rare earth magnets and a method using the coating material to prepare neodymium-iron-boron (NdFeB) magnets having high coercive force. The coating material includes: alloy powder A and low-melting-point metal powder B. The alloy powder A is heavy rare earth element R powder, or rare earth-metal alloy (RM) powder, or rare earth-metal-hydrogen alloy (RMH) powder. The heavy rare earth elements are Dy and/or Tb, metal is Fe or Co, or an alloy of Fe and Co, and H is hydrogen element. The low-melting-point metal powder B is one or two of Zn, Al, and Ga. The preparation method includes the following steps: the coating material is mixed into a slurry, and the slurry is coated on the surface of NdFeB magnet, and then apply a two-stage diffusion heat treatment to the magnet, followed by an annealing process to obtain a high-coercivity NdFeB magnet.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: December 19, 2023
    Assignee: NINGBO JINJI STRONG MAGNETIC MATERIAL CO., LTD.
    Inventors: Feng Xu, Long Meng, Shimao Shen, Yuanhu Hu
  • COATING MATERIALS FOR DIFFUSING INTO MAGNET OF NdFeB AND A METHOD OF MAKING IT
    Publication number: 20210296049
    Abstract: The application discloses a coating material for fabricating rare earth magnets and a method using the coating material to prepare neodymium-iron-boron (NdFeB) magnets having high coercive force. The coating material includes: alloy powder A and low-melting-point metal powder B. The alloy powder A is heavy rare earth element R powder, or rare earth-metal alloy (RM) powder, or rare earth-metal-hydrogen alloy (RMH) powder. The heavy rare earth elements are Dy and/or Tb, metal is Fe or Co, or an alloy of Fe and Co, and H is hydrogen element. The low-melting-point metal powder B is one or two of Zn, Al, and Ga. The preparation method includes the following steps: the coating material is mixed into a slurry, and the slurry is coated on the surface of NdFeB magnet, and then apply a two-stage diffusion heat treatment to the magnet, followed by an annealing process to obtain a high-coercivity NdFeB magnet.
    Type: Application
    Filed: April 1, 2020
    Publication date: September 23, 2021
    Inventors: Feng XU, Long MENG, Shimao SHEN, Yuanhu HU