Theme
Development of evaluation method for load carrying capacity of DLC films
- An example of delamination due to gradual wear of DLC film
- An example of delamination due to embedment of wear debris on DLC film
Research Keywords
Evaluation of tribological properties / Standardization / DLC films / Load carrying capacity / Anti-adhesion characteristics / Friction and wear test
Research Objectives
Load carrying capacity is one of the important properties on the hard thin film. In this study, a method is being developed to evaluate the load carrying capacity of diamond-like carbon (DLC) films with low friction characteristics and excellent wear durability, by causing partial damage (delamination) of the film in a stress range close to that of practical use, from a viewpoint intermediate between scratch tests and friction and wear tests.
Research Results
An evaluation method has been developed for load carrying capacity from the viewpoint of anti-adhesion characteristics by conducting reciprocating sliding tests under step loading conditions. The method is intended to be proposed as an international standard. In parallel, we are also proposing a statistical method to analysis variations in data, investigating influencing factors on the load carrying capacity, monitoring the delamination process using acoustic emission technique.
Links(external publications, patents, related news, etc.)
- H. Mano, T. Ohana, Evaluation of anti-adhesion characteristics of diamond-like carbon film using high-frequency, linear-oscillation tribometer, Wear, 386‒387 (2017) 188‒194.
- H. Mano and T. Ohana, Evaluation of anti-adhesion characteristics of diamond-like carbon film by combining friction and wear test with step loading and Weibull analysis, Materials, 14, 11 (2021) 2746.
Contact
- Tribology Group
- Email:tribo-collabo-ml@aist.go.jp
