Department of Mechanical Engineering

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Material research by tailor-made(Materials Science Laboratory)
Kumiko Tanaka Shimamoto
Associate Professor, Dr. Eng.
E-mail : shimamoto@gifu-nct.ac.jp
Research Fields

Material Science, Mechanical materials, Metal, Ceramics, Polymer

Keywords

Powder Metallurgy, Additive Manufacturing, Cavitation Processing● Tailor-made materials research that matches your needs (Design, fabrication,processing, proposal, analysis, etc.)
1. A study of creation and mechanical properties of boride-based ceramics
We create the hard and strong boride-based ceramics, mainly titanium diboride, and characterize the fabricatedsamples. In the field of powder metallurgy, non-oxide ceramics are roughly classified into hard-to-sinter materials.
Therefore, it is difficult to obtain a high-density sintered body without the addition of a sintering agent or a bonding
metal. In order to obtain a high density sintered body, we investigate the effect of adding sintering agents and thepreparation method, and aim at the application to cutting tools, bearings, and bulletproof plates for the protection ofcivilians.

2. Research and development on high damping material and processing methods
Parts (materials) of aircraft, vehicles, and precision machinery are used in environments where they vibrate. The
dynamic Young's modulus (modulus of elasticity) is lower than the static Young's modulus when the material isused in a vibrating environment. This property depends on the inherent damping ability of the material. We areconduct research on crack growth and fracture of components, high attenuation materials for precision machinery,
dynamic vibration absorbers, etc.

3. Material creation and property evaluation using metal 3D additive manufacturing
technology
In recent years, metal 3D additive manufacturing technology has attracted attention as a new method for
producing materials, and has been widely studied in Japan. 3D additive manufacturing technology is a molding
method that enables complex shapes. Therefore, 3D additive manufacturing method is suitable for manufacturing awater pipe component having a complicated shape which cannot be manufactured by the conventional
manufacturing method. In our laboratory, high performance and high functionality of materials is being studied.

4. Study on recycling technology of fiber reinforced
plastics (FRPs)
Carbon fiber reinforced plastics have a specific strength and a specificelastic modulus about 10 times and about 7 times higher than that of steel,and are attracting attention as a lightweight material. According to thedata released by the Japanese Ministry of Economy, Trade and Industry,
the production of CFRP in 2020 is said to reach 140,000 tons, while theamount of waste wood is increasing. In our laboratory, research on
material recycling using a new method is being conducted.

5. Surface modification of materials using cavitation
processing technology
In our laboratory, a novel cavitation processing technique using
cavitation collapse pressure and heat from ultrasonic vibration is being
investigated. By using cavitation for surface modification of materials, we
aim to improve various properties such as improvement of fatigue
strength and corrosion resistance, refinement of powder, andimprovement of photocatalytic activity (Fig. 1).
Fig. 1 Improved crack resistance of metalmaterials by cavitation processing.
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