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公开(公告)号：US20230392688A1
公开(公告)日：2023-12-07
申请号：US18027777
申请日：2021-09-30
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Kiyoyuki Kawai , Haojie Fu
IPC: F16J9/26
CPC classification number: F16J9/26
Abstract: An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having, on the outer peripheral sliding surface thereof, a DLC coating in which the amount of plastic deformation work as measured by a nanoindentation test is within a specific range.
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Patent Agency Ranking
公开(公告)号：US11867294B2
公开(公告)日：2024-01-09
申请号：US18027702
申请日：2021-09-30
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Tetsuya Nango
CPC classification number: F16J9/26 , C23C14/0605 , C23C14/325
Abstract: An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having a DLC coating on the outer peripheral surface thereof, wherein an S band derived from sp3 bonding is observed in the DLC coating in addition to a G band derived from the graphite structure and a D band derived from the defects of the graphite structure, and these bands satisfy specific relationships.
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公开(公告)号：US11867295B2
公开(公告)日：2024-01-09
申请号：US18027777
申请日：2021-09-30
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Kiyoyuki Kawai , Haojie Fu
IPC: F16J9/26
CPC classification number: F16J9/26
Abstract: An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having, on the outer peripheral sliding surface thereof, a DLC coating in which the amount of plastic deformation work as measured by a nanoindentation test is within a specific range.
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公开(公告)号：US20230392687A1
公开(公告)日：2023-12-07
申请号：US18027702
申请日：2021-09-30
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Tetsuya Nango
CPC classification number: F16J9/26 , C23C14/325 , C23C14/0605
Abstract: An object of the present invention is to provide a sliding member coated with a DLC coating in which microfractures on the sliding surface thereof due to the progression of cracks are less likely to occur, and in which an increase in abrasive wear can be reduced. The present invention achieves the above-mentioned object by a sliding member having a DLC coating on the outer peripheral surface thereof, wherein an S band derived from sp3bonding is observed in the DLC coating in addition to a G band derived from the graphite structure and a D band derived from the defects of the graphite structure, and these bands satisfy specific relationships.
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公开(公告)号：US11242929B2
公开(公告)日：2022-02-08
申请号：US17254546
申请日：2019-06-13
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Takatsugu Iwashita
Abstract: The present invention addresses the problem of providing a piston ring covered with a DLC coating that has excellent wear resistance and shows a low attacking property on a cylinder bore sliding surface. The problem is solved by a piston ring which is used in the presence of an engine lubricating oil and includes a DLC coating on an outer peripheral sliding surface. The DLC coating has an sp2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
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公开(公告)号：US20210270370A1
公开(公告)日：2021-09-02
申请号：US17254546
申请日：2019-06-13
Applicant: TPR Co., Ltd.
Inventor： Tomoyuki Sato , Yutaka Kitazume , Takatsugu Iwashita
Abstract: The present invention addresses the problem of providing a piston ring covered with a DLC coating that has excellent wear resistance and shows a low attacking property on a cylinder bore sliding surface. The problem is solved by a piston ring which is used in the presence of an engine lubricating oil and includes a DLC coating on an outer peripheral sliding surface. The DLC coating has an sp2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
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