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Adachi-Kuriyagawa Lab
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A tribology lab that scientifically investigates and controls friction and wear at contact surfaces.
AboutAbout the lab
Building high-performance machines by designing surfaces and interfaces.
The Adachi-Kuriyagawa Lab, in the Nano-Interface Control Engineering field of the Department of Mechanical Functional Creation at the Graduate School of Engineering, studies friction and wear that occur at contact surfaces where machine parts rub against each other.
This field is called tribology, and it holds the key to the reliability, durability, and performance of machines.
The lab develops technologies to scientifically investigate and control friction and wear, and aims to build machine design methods based on them and to create high-performance machines.
In recent years, the lab has been investigating how the ultralow friction of hydrogen-containing carbon nitride films persists in high vacuum and in environments with different humidity.
The lab's website is published jointly with the Murashima Lab as "Adachi-Kuriyagawa/Murashima Lab."
Key terms
- Tribology
- The science and technology of surfaces and contact interfaces. It holds the key to the reliability, durability, and performance of machines
- Carbon nitride film
- A type of hard thin film. When nitrogen gas is adsorbed onto it, it shows low friction without lubricating oil
- Water lubrication
- A method that uses water instead of oil as a lubricant so that rubbing surfaces slide smoothly. Ceramics can achieve very low friction this way
ResearchResearch themes
Many causes of machine failure and limited lifetime arise at contact surfaces, so higher-performance machines require "surface and interface design" in addition to "design of shape and materials." The lab develops technologies to scientifically investigate and control friction and wear at contact surfaces, and aims to build machine design methods based on them.
*Illustrative imageAdsorbed-Gas Lubrication of Carbon Nitride Films
When nitrogen gas is adsorbed onto a carbon nitride film, friction as low as that with oil lubrication (friction coefficient 0.003) is obtained without lubricating oil. The lab aims to clarify how adsorbed gas lowers friction, to create carbon nitride films for practical use, and to establish design guidelines for tribosystems.
Water Lubrication of Ceramics
With water as a lubricant, ceramics can achieve very low friction, with a friction coefficient on the order of 0.001, and such water-lubricated systems are expected to serve as sliding elements in environmentally friendly machines. The lab aims to clarify how water lubrication lowers friction and studies the design of sliding surfaces and tribosystems for wide use.
MembersFaculty
- ProfessorKoshi Adachi
- Assistant ProfessorKazuya Kuriyagawa
VoicesStudent voices
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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: “Friction-driven Encoder Test (encoder 01-CC)” International Gemini Observatory/NOIRLab/NSF/AURA / CC BY 4.0 (cropped)
- Adsorbed-Gas Lubrication of Carbon Nitride Films: “Optical coating - Thin film coating - Stripe filters - CILAS” CILAS / CC BY-SA 3.0 (cropped)
- Related lab (Murashima Lab): “Diamond-like carbon coated cobalt ball” Drac2000 at English Wikipedia / CC BY-SA 3.0 (cropped)
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- Related lab (Shoji Lab): “150 deg water contact angle” Plasmatreat Khoren / CC BY 3.0 (cropped)
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