Creation of thermo-sensing element acting in frictional interface by means of nanocompositing of diamond like carbon and soft metal with self-lubricating ability

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04161
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Ube National College of Technology
• Principal Investigator: GOTO Minoru 宇部工業高等専門学校, 機械工学科, 教授 (00435455)
• Co-Investigator(Kenkyū-buntansha): 仙波 伸也 宇部工業高等専門学校, 電気工学科, 教授 (40342555)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: トライボロジー / ナノ複合膜 / 金 / 銀 / 銅 / 複合ターゲット

Outline of Final Research Achievements

A deposition method that can prepare a soft metal/diamond-like carbon nanocomposite film (SMe-DLC) controlled over a wide range of the composition ratio of gold (Au), silver (Ag), and copper (Cu) has been demonstrated. We investigated the relationship between the concentration of SMe in the SMe-DLC and the structure, mechanical properties, and clarified the relationship with the friction and wear properties. As a result, it was demonstrated that the friction/wear properties and electrical properties in the atmosphere could be optimized by changing the SMe content in the film.
We also proposed a method to quantitatively evaluate the amount of wear due to SMe-DLC with a film thickness of less than 1 μm using a transmission electron microscope (TEM), and have developed a four-terminal probe type resistivity measurement apparatus for determining temperature dependency of electrical conductivity under various atmospheres.

Free Research Field

トライボロジー

Academic Significance and Societal Importance of the Research Achievements

SMe-DLCの組成・ナノ構造と抵抗率の温度依存性および摩擦・摩耗特性の関係を明らかにし、SMe-DLCの温度センサ機能と摩擦・摩耗特性を最適化すると共に、その評価法を確立する。トライボロジーとデバイス工学を融合した本研究課題の推進により、実働機械の複雑な運転状態における摩擦過程をリアルタイムで最適化し、機械摺動部の摩擦によるエネルギー損失を最小化するためのトライボロジーシステム設計技術の確立に資する。