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Omori-Ito Lab
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The lab determines phase diagrams through experiments and calculations to design new alloys.
AboutAbout the lab
Mapping materials to design new alloys.
The Omori-Ito Lab determines phase diagrams, often called 'maps of materials,' through experiments, then analyzes them by computer and compiles them into databases.
With computational phase diagrams, materials development that once relied on trial and error can proceed much more efficiently.
Using thermodynamic databases the lab has built itself, it conducts research on shape memory alloys, medical materials, heat-resistant materials, magnetic materials, and steels.
The lab carries out the whole process in-house, from alloy fabrication to microstructure control, microstructure analysis, and property evaluation.
Key terms
- Phase diagram
- A diagram showing which phases appear at which temperatures and compositions. It serves as a map for materials development.
- CALPHAD method
- A method that analyzes experimentally obtained phase diagrams thermodynamically and then calculates phase diagrams for combinations that have not yet been investigated.
- First-principles calculation
- A method that predicts the properties of materials by calculation, starting only from the fundamental laws governing atoms and electrons.
NewsLab news
A student received an Outstanding Poster Award at the 45th Poster Session of the Japan Institute of Metals and Materials 2025 Autumn Meeting
Assistant Professor Sheng Xu received the 65th Harada Research Encouragement Award
A student received the Best Poster Presentation Award at ESOMAT 2024 (13th European Symposium on Martensitic Transformations)
ResearchResearch themes
The lab determines phase diagrams through both experiments and calculations, and aims to develop unprecedented new materials through microstructure control grounded in the thermodynamics of microstructures. For multicomponent systems with three or more elements, it uses thermodynamic analysis by the CALPHAD method and first-principles calculations, and connects them to simulations of diffusion and phase transformations.
*Illustrative imageTexture and abnormal grain growth
The lab studies the microstructure of iron and copper alloys, especially texture and grain growth. It discovered that cyclic heat treatment, alternating cooling and heating between a single-phase region and a two-phase region, induces abnormal grain growth, and demonstrated that large single crystals can be produced by heat treatment alone.
*Illustrative imageSolid-liquid reactions in hot-dip coated steel sheets
Hot-dip coating greatly improves corrosion resistance, so it is widely used for automobile body panels and building materials. The lab analyzes thermodynamically how the intermetallic compounds that govern coating adhesion form, using experiments on solid-liquid diffusion and phase equilibria.
*Illustrative imagePhase diagrams and new materials for heat-resistant alloys
Raising the maximum service temperature of heat-resistant materials improves the energy efficiency of combustion engines. The lab determines phase diagrams of refractory metals by experiment, builds thermodynamic databases, and uses them for materials design and microstructure control to develop new heat-resistant materials.
*Illustrative imageDevelopment of high-strength copper alloys
Copper alloys are indispensable to industry, for example in lead frames, connectors, and heat exchanger tubes. The lab develops copper alloys with excellent electrical and thermal conductivity as well as high strength, starting from the construction of phase diagrams and microstructure control.
MembersFaculty
The Omori-Ito Lab consists of faculty members, academic researchers, doctoral, master's, and undergraduate students, and research students. Faculty members of the Frontier Research Institute for Interdisciplinary Sciences also take part in supervision.As of 2025
- ProfessorToshihiro Omori
- Assistant ProfessorTatsuya Ito
- Assistant ProfessorSheng Xu
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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: “Aluminium etched” Alchemist-hp (talk) (www.pse-mendelejew.de) / CC BY-SA 2.0 de (cropped)
- Texture and abnormal grain growth: “Field of Grains 9x )” Savannah River Site / Public domain (cropped)
- Solid-liquid reactions in hot-dip coated steel sheets: “Galvanized surface” The original uploader was Splarka at English Wikipedia. / Public domain (cropped)
- Phase diagrams and new materials for heat-resistant alloys: “Gas turbine blade” Tetris L / Public domain (cropped)
- Development of high-strength copper alloys: “Copper alloy microstructure” Rsaage / CC BY 4.0 (cropped)
- Related lab (Xu Lab): “EBSD orientation map of ferrous lath martensite” Tiberio / CC BY-SA 4.0 (cropped)
- Related lab (Kubo Lab): “BalticServers data center” BalticServers.com / CC BY-SA 3.0 (cropped)
- Related lab (Nogami Lab): “Iron runners - Trumbull-Cliffs Blast Furnace” "New Trumbull-Cliffs 600-Ton Blast Furance", The Iron Age, September 15, 1921, p. 676 / Public domain (cropped)
- Related lab (Saito Lab): “Molybdenite-251617” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
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