Search

JP-2026075394-A - Sliding device

JP2026075394AJP 2026075394 AJP2026075394 AJP 2026075394AJP-2026075394-A

Abstract

[Problem] To provide a technology that enables stable wear resistance in sliding devices used in a hydrogen atmosphere. [Solution] The sliding device (10) is configured such that a first sliding surface (110), which is the surface of a first sliding body (11), and a second sliding surface (120), which is the surface of a second sliding body (12), slide against each other in a hydrogen atmosphere. Specifically, the sliding device comprises a first solid lubricating film (112) and a second solid lubricating film (122). The first solid lubricating film constituting the first sliding surface is provided on the first sliding body and consists of a material having an amorphous structure. The second solid lubricating film constituting the second sliding surface is provided on the second sliding body and consists of a material having a layered structure. [Selection Diagram] Figure 1

Inventors

  • 小島 永児
  • 大竹 伸幸

Assignees

  • 株式会社デンソー
  • トヨタ自動車株式会社
  • 株式会社ミライズテクノロジーズ

Dates

Publication Date
20260508
Application Date
20241022

Claims (5)

  1. A sliding device (10) in which a first sliding surface (110), which is the surface of a first sliding body (11), and a second sliding surface (120), which is the surface of a second sliding body (12), slide against each other in a hydrogen atmosphere, A first solid lubricating film (112) is provided on the first sliding body, which constitutes the first sliding surface, A second solid lubricating film (122) is provided on the second sliding body, which constitutes the second sliding surface, Equipped with, The first solid lubricating film is made of a material having an amorphous structure. The aforementioned second solid lubricating film is made of a material having a layered structure. Sliding device.
  2. The aforementioned second solid lubricating film is made of a transition metal chalcogenide. The sliding device according to claim 1.
  3. The aforementioned second solid lubricating film consists of a transition metal chalcogenide containing additive elements. The sliding device according to claim 1.
  4. The second sliding body is, Base material (121) and An intermediate layer (123) is provided so as to cover the substrate, The second solid lubricating film is provided so as to cover the intermediate layer, Having a layered structure, A sliding device according to any one of claims 1 to 3.
  5. The aforementioned intermediate layer is made of a transition metal chalcogenide. The sliding device according to claim 4.

Description

This disclosure relates to a sliding device used in a hydrogen atmosphere. Patent Document 1 discloses a sliding member for use in a hydrogen environment, more specifically, in a state exposed to a hydrogen atmosphere, or more specifically, a hydrogen-containing gas. Such a sliding member for a hydrogen environment has at least a portion of its surface covered by a coating layer made of diamond-like carbon. This coating layer contains elements (e.g., nitrogen or fluorine) whose bond energy with carbon is greater than the bond energy between carbon and hydrogen. This makes it possible to suppress the penetration of hydrogen into the diamond-like carbon. Japanese Patent Publication No. 2017-202946 This is a cross-sectional view showing a schematic configuration of a sliding device according to the first embodiment of the present disclosure.This graph shows a comparison of the wear rates in the examples and comparative examples.This is a cross-sectional view showing a schematic configuration of a sliding device according to the second embodiment of the present disclosure. (Embodiment) The embodiments of this disclosure will be described below with reference to the drawings as appropriate. The following embodiments, their modifications, and the drawings relating thereto are schematic or simplified for the purpose of concisely explaining the contents of this disclosure, and do not in any way limit the contents of this disclosure. Therefore, it goes without saying that the descriptions in the drawings do not necessarily correspond to the specific device configurations actually manufactured and sold. In other words, unless explicitly limited by the applicant in the application history, this disclosure should not be interpreted restrictively by the descriptions in the drawings and the corresponding descriptions of the configurations, functions, or operations described below. (First embodiment: configuration) The configuration of a sliding device 10 according to one embodiment of the present disclosure will be described below with reference to Figure 1. As shown in Figure 1, the sliding device 10 according to this embodiment comprises a first sliding body 11 and a second sliding body 12, and is configured on the premise that the first sliding body 11 and the second sliding body 12 slide in a hydrogen atmosphere. "Hydrogen atmosphere" refers to an atmosphere containing hydrogen. Typically, a hydrogen atmosphere is a gaseous atmosphere containing hydrogen gas. For the sake of illustration and explanation, we will set up a right-handed XYZ coordinate system as shown in Figure 1. Here, the Z-axis direction is referred to as the "height direction," and any direction within the XY plane is referred to as the "in-plane direction." In this embodiment, the first sliding body 11 is formed in a plate shape extending in the in-plane direction. On the other hand, the second sliding body 12 is formed in a spherical shape or a cylindrical or cylindrical shape having a central axis parallel to the Y-axis in the figure. The sliding device 10 is configured such that the first sliding body 11 and the second sliding body 12, which are arranged in the height direction, slide along the in-plane direction. The first sliding body 11 has a first sliding surface 110, which is the surface facing the second sliding body 12, i.e., the sliding surface. In this embodiment, the first sliding surface 110 is formed in a planar shape extending in the in-plane direction. Specifically, the first sliding body 11 comprises a first base material 111 and a first solid lubricating film 112. The first base material 111 has a structure in which a base film made of titanium nitride is formed on the surface of a bearing steel such as SUJ2. The first solid lubricating film 112 is provided on the first sliding body 11 so as to cover the first base material 111. Specifically, the first solid lubricating film 112 is formed on the base film formed on the surface of the first base material 111. The first solid lubricating film 112 constitutes the outermost layer of the first sliding body 11, i.e., the first sliding surface 110, and is formed of a transition metal chalcogenide. In this embodiment, the first solid lubricating film 112 has a structure as a molybdenum disulfide film. The second sliding body 12 has a second sliding surface 120, which is the surface facing the first sliding body 11, i.e., the sliding surface. In this embodiment, the second sliding body 12 is formed in a spherical or cylindrical shape. Specifically, the second sliding body 12 comprises a second base material 121 and a second solid lubricating film 122. The second substrate 121 has a structure in which a titanium nitride undercoat is formed on the surface of a bearing steel such as SUJ2. The second solid lubricating film 122 is provided on the second sliding body 12 so as to cover the second substrate 121. Specifically, the second solid lubricating film 122 is formed on the undercoat created