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Hydrogen Equipment Tribology Lab (Hiroyoshi Tanaka)
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A tribology lab that studies friction, wear, and lubrication, from fundamentals to applications.
AboutAbout the lab
Uncovering the phenomena of friction, wear, and lubrication.
The Tribology Lab studies tribology, the field that deals with problems of friction, wear, and lubrication.
The lab works with universities, research institutes, and companies in Japan and abroad on challenges ranging from fundamental ones, such as exploring and clarifying phenomena at friction surfaces, to applied ones, such as solving practical problems.
Its research themes include friction and wear in hydrogen, rolling contact fatigue of bearings, and DLC coatings.
The lab holds the "Tribology Discussion Meeting," inviting speakers from outside the university to give talks.
Key terms
- Tribology
- The field that deals with problems of friction, wear, and lubrication.
- Rolling contact fatigue
- Fatigue that occurs in rolling contact, such as in bearings. It is a factor that determines the durability of machines.
- DLC
- Diamond-like carbon. A carbon film applied to modify the surfaces of machine parts.
NewsLab news
View More ↗ResearchResearch themes
The Tribology Lab studies challenges ranging from fundamental ones, such as exploring and clarifying phenomena at friction surfaces, to applied ones, such as solving practical problems. Assistant Professor Hiroyoshi Tanaka aims to improve the performance of machine elements, focusing on rolling contact fatigue of bearings and DLC coatings, and also works on evaluating the compatibility of components such as fittings used in hydrogen infrastructure with hydrogen environments.
*Illustrative imageFriction and Wear in Hydrogen
The lab investigates how materials rub against each other and wear away in a hydrogen atmosphere. It also covers the durability and environmental compatibility of rubber materials and ultra-high-pressure fittings used in equipment that handles hydrogen.
*Illustrative imageRolling Contact Fatigue of Bearings and Lubricants
The lab investigates rolling contact fatigue of bearings, regarded as a factor governing the durability of machines, while varying the type of lubricant and the surrounding gas. It also analyzes the amount of hydrogen entering the steel and the chemical changes on the rolling surfaces.
*Illustrative imageFriction and Wear of DLC Coatings
DLC coatings are used in a variety of applications as a technology for modifying the surfaces of machines. The lab investigates the friction and wear of DLC films in hydrogen.
MembersFaculty
The Tribology Lab consists of faculty members, technical officers, project professors, academic researchers, technical staff, administrative assistants, and doctoral, master's, and undergraduate students.As of 2025
- ProfessorKazuyuki Yagi
- Associate ProfessorShohei Kawada
- Assistant ProfessorHiroyoshi Tanaka
- Project ProfessorJoichi Sugimura
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Silicon nitride Si3N4 bearing ball 10 mm G10” Lucasbosch / CC BY-SA 3.0 (cropped)
- Friction and Wear in Hydrogen: “High-Pressure-Technology T-Fitting-01” CEphoto, Uwe Aranas / CC BY-SA 3.0 (cropped)
- Rolling Contact Fatigue of Bearings and Lubricants: “Rolling contact fatigue” M.E. Curd et al. / CC BY-SA 4.0 (cropped)
- Friction and Wear of DLC Coatings: “Optical coating - Thin film coating - Stripe filters - CILAS” CILAS / CC BY-SA 3.0 (cropped)
- Related lab (Hydrogen Equipment Tribology Lab): “Rolling-element bearing (numbered)” Niabot / CC BY-SA 3.0 (cropped)
- Related lab (Polymer Materials Tribology Lab): “Friction between surfaces” CaoHao / CC BY-SA 4.0 (cropped)
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