Graduate School of Science and Technology
Kumamoto University
2-39-1 Kurokami, Chuo-ku,
Kumamoto 860-8555, Japan
Phone:+81-96-342-3513,
Fax:+81-96-342-3510
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Master's Course

Materials Science and Engineering

In light of the fact that materials development is crucial for industrial promotion, Materials Science and Engineering seeks to achieve production of new materials and to contribute to the prosperity of the world community. Therefore, students must be eager to become materials engineers with global visions of modern technology and the environment including natural resources. The education assumes that students have sufficient knowledge of materials science and engineering from the undergraduate course.

Educational Goals
Materials Science and Engineering is dedicated to education and research in the wide field of materials science and engineering, including metals, ceramics, electronic materials and composites. The educational objective of the Materials Science and Engineering Graduate Course at Kumamoto University is to foster well-skilled and broadly educated professional engineers who may investigate the physical and chemical properties of materials needed for constructing new material systems supporting the continuous development of human welfare.

Educational Characteristics
Materials Science and Engineering involves 8 laboratories conducting advanced research from materials synthesis, physical and metallurgical properties through recycling processes. All research deals with materials at the atomic and/or electronic level.

Process Metallurgy Laboratory

Almost all materials processing treat electrical conducting materials, where electromagnetic force is effective in order to improve the performance of the products and the efficiency of the material processes. Our group is exploring the possibilities of application of intense magnetic field and electromagnetic force to materials processing.

  • Innovative crystal orientation of electro-deposited film by means of strong magnetic field
  • Control of the morphology of metal anodized film by applying magnetic or electric field
  • Evaluation of solidified structure with electromagnetic stirring
  • Beneficial recycling of coal ash with strong electric field
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Crystal oriented Cd deposited film under strong magnetic field imposition.

Physical Properties of Materials Laboratory

Plastic deformation and fracture behavior are key physical properties in metals. Main target in our group is to clarify the dislocation theory and fracture mechanism in hexagonal close-packed (hcp) single crystals. In contrast to single crystals, we also focus on metals with nano- or submicron-sized grains. Our group studies physical properties in such metals through experiments and atomistic simulations.

  • Plastic deformation of single- and poly-crystalline hcp metals: Ti, Mg and its alloys
  • Molecular dynamics (MD) simulation of deformation and crack propagation behavior
  • Fatigue properties of metals with nano- or submicron-sized grains
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Deformation by a spherical indentation testing on a low index plane in single crystalline Mg. The deformation behavior can be analyzed by the MD simulation.

Laboratory of Microstructure and Interface Control and Engineering

Grain boundaries have different properties according to their structure. The properties of grain boundaries often control the physical properties of the entire polycrystalline material. Thus, it is vitally important to make the best use of the individual characteristics of grain boundaries to design and control materials properties. The research in our group takes as its basis grain boundary and interface science and engineering with the aim of developing advanced materials with excellent function and performance.

  • Grain boundary structure and properties
  • Microstructural design of advanced engineering materials
  • Development of a novel surface modification technique using iron powder
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EBSD micrograph showing propagation of a creep crack along the prior austenite grain boundary in 12 wt% Cr ferritic steel

Advanced Materials Laboratory

Mechanical characterization of micro/nano materials for micro-devices including MEMS (Micro-Electro-Mechanical Systems) and hierarchical-structured materials has been developed. The results obtained provide fundamental information for developing MEMS devices and designing advanced structural materials.

  • Micro-mechanical characterization of thin films for MEMS/NEMS applications
  • Development of machines for micro-mechanical testing
  • Microstructural characterization of shape memory alloy by transmission electron microscopy
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Micro-sized cantilever beam specimen with notch for fracture testing. This specimen size is much smaller than the diameter of a human hair. We have successfully measured fracture toughness values for this type of specimen.

Laboratory of Harmonic Materials for Environment

We offer excellent research environment including opportunities of discussing with the leading scientists and of using advanced facilities, through development of advanced alloy and processing design. Our research interests include the development of new magnesium alloys with high strength, good ductility, and high corrosion-resistance, based on new multimodal microstructure design concept. We are currently engaged in the research and development of Mg alloys with a long period stacking ordered (LPSO) phase.

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Atomic-resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images of the long-period stacking/order structure of a high-strength Mg alloy.

Functional Materials Design Laboratory

The objective of this laboratory is to develop advanced functional ceramic-based materials using cost-effective wet processes including electrophoretic deposition and innovative materials design techniques with extreme conditions such as high magnetic field for the following applications: environmental conservation, energy conversion, and nanotechnology.

  • Development of functional ceramic materials for solid oxide fuel cell (SOFC)
  • Fabrication of gas separation membrane for environmental conservation
  • Development of novel nano-carbon materials
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Microstructure of high performance solid oxide fuel cell with bilayered electrolyte consisting of ca. 4 μm-thick YSZ and ca. 1 μm-thick SDC films fabricated by electrophoretic deposition. YSZ : Y2O3-stabilized ZrO2, SDC: Sm2O3-doped CeO2, LSCF: (La, Sr)(Co, Fe)O3.

Carbon Nanomaterials Laboratory

We instruct students in expertise on materials science through the development and the application of carbon related nanomaterials. Carbon, one of the most familiar elements, has potential for forming novel nanostructures, which could lead to the creation of new materials with revolutionary properties. We aim to solve problems in a wide area of our life including resource, environment, energy, medicals, and so on.

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TEM image and schematic of the structure of a new material developed and named ‘carbon nanopot’ by our research group.

Solid Mechanics Laboratory

Mechanics is one of the oldest research fields in natural science. Recent significant progress of numerical ability of computers makes it possible to explore non-linear mechanics of solid materials. We investigate deformation behavior of solid materials with the aim of further development of mechanics.

  • Development of constitutive models for metallic materials based on experimental observation.
  • Prediction and evaluation of macroscopic deformation behavior and/or microstructure development by finite element methods with the developed constitutive models.
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Numerical results of deformation process of a HCP metal with strong crystallographic anisotropy

Materials Structure Control Science Laboratory

Research in this laboratory focuses on development of the morphological and structural control of carbon or oxides, and evaluation of their properties, based on the specific research field of inorganic and electronic materials. The morphology and structure of carbon or oxides have been controlled by three methods: chemical vapor deposition (CVD), anodization of metal sheet, and hydrothermal synthesis. As one of functional devices, the microdevice with multi-walled carbon nanotubes (MWCNTs) array on the interdigitated Au electrodes fabricated by UV photolithography technique showed excellent selectivity to 1 ppm sulfur gases by the effect of p-n junction on the tip of MWCNT.

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Microdevice with MWCNTs array on the Au interdigitated electrodes.

Classes

Plasticity of Crystalline Materials
Computer Simulation for Material Science
Material Interface Science
Interfacial Electrochemistry
Non-Equilibrium Materials
Electronic Properties of Materials
Functional Ceramics Materials Engineering
Thermodynamics for Material Processing
Solidification Theory
Strength of Materials in Several Environments
Fracture of Materials
Structure Control of Materials
Microstructural Characterization
Continuum Solid Mechanics
Introduction to Advanced Materials
Nano and Biomaterials
Special Seminar for Materials Science 1
Special Seminar for Materials Science 2
Introduction to Materials Science
Basic Seminar for Materials Science