Nano and atomic scale analysis laboratory

Categories of technology seeds


本間 智之

HOMMA Tomoyuki

Mechanical Engineering

Associate Professor



Condensed matter physics II/Metal
Physical properties of metals/Metal-base materials/First principle calculations/ Materials design simulations
Materials processing/Microstructural control engineering/ Crystal structure/Microstructure control

Research areas

In our laboratory, we have clarified the ”reasons why” found in companies with nanoscale such as high strength obtained in Al, Mg and Ti alloys and thermoelectric properties based on the nano and atomic scale analysis methods. We deal with Ti, Mg and Al alloys, Ni-base superalloys, themoelectric material and so on. So far, we are collaborating with Honda, Daido Steel, IHI, UACJ, SUS and other companies. Using X-ray, electrons and neutrons, materials properties in microscale are extracted.

Main facilities

Precision Ion polishing system
Tensile Testing machine
Vickers hardness tester
Electric furnaces
Arc melting furnace
First principle analysis software
Thermodynamical calculation software

Forte of this laboratory's study

1. Crystal structure analysis using TEM
2. Crystal structure and dislocation density analyses using X-ray
3. microstructural analysis using SEM
4. Sintering of metals and themoelectric materials
5. Fabrication of button ingot using Arc melting furnace
6. Mechanical property measurements using tensile test machine
7. Texture analysis of plastically deformed materials

Achivements/proposals via industry-academia collabolations

·Microstructural analysis of linear friction welded Ti alloys
·Elucidation of generation of surface defects on extruded Al alloy
·Texture analysis in Al alloys using electron backscattered diffraction
·Elucidation of effects of container made of Ti on taste of liquid
·Nanostructural analysis of reaction layer between electrode and matrix of thermoelectric materials
·Identification of role of fine g’ phase on high temperature strength in Ni base superalloy

Areas interesting to interact with

Ti alloys, development of aircraft parts, Development of high temperature resistant materials, development of structure components in transports, development of thermoelectric properties and improvement of plastic deformability

Intellectual properties

Development of light weight plates, Develoment of high strength and temperature resistant Mg alloys and Development of special container


Our aims of the collaborations with companies are involvements of developments of components used for broad societies. We also expect that we prepare collaborative budget applications together based on deep conversations with the related companies. We also accept any lectures and seminars related to basics of the light metals.

  • Fig. 1 Evaluations of texture and strains near the weld zone after welding two Ti-6Al-4V (wt. %) alloys using a linear friction welding technique.Fig. 1 Evaluations of texture and strains near the weld zone after welding two Ti-6Al-4V (wt. %) alloys using a linear friction welding technique.
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