Yoshimi Lab. - 吉見研究室

Tohoku University

Ultra-High Temperature Materials Group
Depertment of Materials Science, Tohoku University

吉見研究室東北大学 大学院工学研究科・工学部 知能デバイス材料学専攻 ナノ材料物性学講座 強度材料物性学分野

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For Students - 学生の皆さんへ

Tohoku Univ.

Structural materials are employed to stably retain the shape of a structure for a long time. However, materials could be damaged in some usage environments, and the apparent mechanical properties degrade every moment. Therefore, the lifetime of structural materials should be prolonged under wide ranges of temperatures, from very low temperatures to immediately below the melting point, environments (atmospheres), and heavy static and dynamic mechanical loads. The following three fundamental issues are the most important from a materials engineering viewpoint: elastic modulus, diffusion, and phase transformation (microstructure). These issues affect the lifetime of materials, sometimes independently and sometimes in conjunction with each other. Principles and theories about each issue have been discussed in depth for a long time and can be learned from many textbooks. However, from the viewpoint of materials development, these three fundamental issues remain a complex puzzle, and time-consuming trial and error is necessary to find a solution. Thus, our research laboratory not only analyzes and understands materials strength and high-temperature materials properties but also conducts research activities through daily trial and error to create new materials.

Our research laboratory can handle all of the following in-house: materials fabrication and synthesis (arc-melting, high-frequency melting, plasma melting, spark plasma sintering, environmentally-controlled ultrahigh-temperature heat treatment, etc.), materials evaluation (compression testing, tensile testing, bending testing, ultrahigh-temperature creep testing, hardness testing, nanoindentation, thermal expansion testing, thermo-gravimetric testing, etc.), materials analysis (differential thermal analysis, ultrasonic vibration analysis, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, etc.), and furthermore materials modeling and simulation (first-principle calculations and finite element calculations) (Refer to the equipment page). This gives undergraduate and graduate students the opportunity to polish the skills they are best at and to further accumulate new insight and experience, thus nurturing comprehensive capabilities in materials science and high-temperature materials studies. Furthermore, we focus on our mission, which is to develop structural materials that would be useful to society and to utilize structural materials in society. We collaborate closely with universities, public research organizations, government agencies, and private companies in Japan. We also collaborate with overseas universities and research organizations to promote social contribution while enhancing communication skills in an international environment.

We wish undergraduate and graduate students to understand the following. As outlined above, the fundamental philosophy of our research laboratory is to contribute to society through research activities and accomplishments that protect the environment and to be a foundation for global peace and the prosperity of humanity. We believe that writing academic papers, which will be global common assets, is as important as research activities and accomplishments. Therefore, we strongly recommend that undergraduate and graduate students author academic papers. Simply studying and researching in our lab are not enough; the research alone does not constitute an “accomplishment.” Take the initiative in writing an academic paper once you get research results! We think that this is a social responsibility, even for a student, for someone affiliated with the materials engineering-related divisions of Tohoku University, with its rich history and tradition of excellence. Of course, there is no need to increase the number of papers for no good reason. Why not publish research results, as suitable and appropriate, in the form of academic papers, thus advancing studies in materials science and contributing to the development of science and technology in general?

Linguistic skills, including Japanese, are indispensable in writing academic papers. Logic in the written text is also very important. Please have solid basic skills in Japanese, English, and mathematics, in addition to field-specific expertise.

Professor Kyosuke Yoshimi





教授 吉見 享祐

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