Functional thin films preparing anti-stick and anti-seizure functions

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K21078
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 26:Materials engineering and related fields
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Ohtake Naoto 東京工業大学, 科学技術創成研究院, 教授 (40213756)
• Project Period (FY): 2020-07-30 – 2023-03-31
• Keywords: コーティング / ダイヤモンド状炭素 / 耐摩耗性 / 耐焼付き性 / 積層膜 / グラファイト化

Outline of Final Research Achievements

In resign molding, mold release agent is generally used to reduce the mold release resistance, but it has large environmental burden. To solve this problem, we developed Onion-Like Diamond-Like Carbon (DLC) coating with stacking structure of DLC film and graphite-like film. Since synthesis of graphite-like film onto DLC film directly is known to be difficult, in this study, DLC film was laminated with copper film as the metal catalyst by plasma CVD method and magnetron sputtering method aiming to transform a part of DLC film at the vicinity of the copper into graphite-like film. As a result, the stacking sample of DLC and copper film obtained anti-stickiness. In order to achieve peeling from the upper layer, we investigated mechanism of peeling and evaluate the peeling property with changing the copper layer's thickness and with or without heat treatment. Finally, we succeeded to fabricate Onion-Like DLC coating with anti-stickiness and wear resistance.

Free Research Field

機械材料・材料加工

Academic Significance and Societal Importance of the Research Achievements

これまで数多ある表面コーティングの研究成果では実現不可能である「耐摩耗性と耐付着性を両立させた表面」の形成に挑戦することが，本研究最大の意義であり、広く焼付きを防止する手法を提案する点で産業に貢献する点で社会的意義は大きい。そして，表面コーティングとして，二次元構造で，高い弾性率と剥離性を有するグラフェンと，ダイヤモンドの50%以上の硬さをもち，極めて高い耐摩耗性を有するDLCからなる炭素系積層薄膜によって耐摩耗性と耐付着性を両立することを提案している点で，炭素系材料の諸特性を学術的に理解・活用するブレークスルーとなる。