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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About Us - 研究室について

History - 歴史

Tohoku Univ.

Our research laboratory has a tradition of excellence and a history of more than half a century as the center of materials strength and high-temperature materials studies at Tohoku University after establishment by Seiichi Karashima (Professor Emeritus, Tohoku University) in 1960. Hiroshi Oikawa (Professor Emeritus, Tohoku University, 1982–1997) and Kouichi Maruyama (Professor Emeritus, Tohoku University, 1997–2013) became subsequent laboratory leaders. We have achieved spectacular results and continue to lead the world in the fields of materials strength and high-temperature materials, such as the high-temperature strengths of metals and intermetallic materials, creep deformation mechanisms, grain boundary engineering, fracture and fatigue, and deformation theory.


Academic and R&D Fields - 学問・研究分野

Tohoku Univ.

Our research laboratory has maintained its history and tradition of excellence while addressing the demands of a new era. Our main research field is materials strength and high-temperature materials studies that solve problems affecting the global environment and energy resources. Structural materials support the very foundation of our lives, from giant structures such as plant facilities, buildings, bridges, and tunnels to transportation equipment, including automobiles, Shinkansen trains, aircraft, rockets, and even portable electronic devices. Structural materials are used to stably retain the form of the structure for a long time; however, the properties of materials drastically change depending on their usage environment. Therefore, increasing the lifetime of materials in diverse usage environments must be considered, and thus we study the physical, chemical, and mechanical properties of materials to understand what determines the lifetime of materials. Furthermore, we propose materials design guidelines based on the obtained insight. Moreover, we will breathe new life into the field of high-temperature materials by creating new materials based on our materials design principles. We are currently focusing on heat-resistant steel, refractory metal-based super alloys, and heat-resistant ceramics.


Research and Education Philosophy - 研究教育理念

The research and educational philosophy of our research laboratory is to contribute to society through research activities and accomplishments that protect the Earth’s environment and form the foundation for global peace and the prosperity of humanity.
“Contributing to society through research activities and accomplishments” is nothing less than writing academic papers, which will be global common assets, and publishing in academic journals. Therefore, we routinely teach writing of academic papers and submission to academic journals to undergraduate and graduate students.
Our educational philosophy is “high-temperature materials research is like going a long way with a heavy load.” Excellent durability is required in structural materials.


Research Environment in Laboratory - 研究教育環境

Our research laboratory can handle all of the following in-house: materials creation (arc melting, high-frequency melting, plasma melting, spark plasma sintering, environmentally controlled heat treatment, etc.), materials evaluation (compression testing, tensile testing, bending testing, high-temperature creep testing, hardness testing, nanoindentation, thermal expansion testing, thermogravimetric testing, etc.), materials analysis (differential thermal analysis, ultrasonic vibration analysis, X-ray diffraction analysis, scanning electron microscopy, tunneling electron microscopy, etc.), and materials theory (first-principles calculations, molecular dynamics calculations, and finite element calculations). Therefore, we can flexibly support various requests over a wide area from researchers and industry. Undergraduate and graduate students can develop strong technical skills while carrying out daily research activities, gaining experience and practice using various types of experimental equipment for materials synthesis and processing, evaluation, analysis, and simulation. Our research laboratory is international, and thus communication skills could be enhanced by working with students from different countries, including South Korea, China, and France and through collaboration and academic interaction with research organizations and research groups worldwide.


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