Invited Speaker：Prof. Seiji Miura（三浦诚司 教授）

Time: 9:00-10:00 am, Oct. 30, 2018

Location: New MSE Building, No. 01 Meeting Room （新材料大楼材料学院第一会议室）

【Title】Brief Sketch of Hokkaido University and Research Activity in Division of Materials Science and Engineering

Abstract：Hokkaido University started out in 1876 as the Sapporo Agricultural College, and students have learned many subjects related to engineering such as civil engineering, mechanics and mathematics. In the former part of my presentation, I will talk on the history of the university and the Faculty of Engineering.

In the latter part of my presentation, I would like to talk on the research activities in our division, Materials Science and Engineering. There are11 research groups in our division, and various research topics,such as new reaction routes of materials as economical and ecological processes, the control of surface and inside microstructures of bulk materials for improved properties, and development of new class of high temperature materials for energy production,have been investigated.

The key words of my researches are as follows: phase diagram, phase stability, intermetallic compounds, microstructure, mechanical properties, and so on.I have been working on fundamental studies such as deformation behaviors of intermetallic compounds and Mg alloys single crystals, development of ternary and quaternary phase diagrams composed of Mg, transition metal elements (Zn, Al, Ni) and rare-earth elements (Y, Dy, Ho), and alloy designing of ultra-high temperature materials based on refractory metal silicides. We have also tried to develop new methods and techniques to accelerate our research activity. Recently we are trying to combine conventional phase diagram researches with 1st principles calculations to understand and expand traditional rules for alloy designing such as the atomic size rule for the stability of AB2-Laves phase. The Laves phase is one of the biggest groups of intermetallic compounds appearing in various alloy systems such as Mg, Fe and refractory metals. Alloys withLaves phases tend to show lower toughness. The stability of the Laves phase has been believed to be governed by the ratio of the diameter of component elements A and B, i.e., DA/DB. However, in ternary Laves phases such as Nb(Ni, Al)2 it is thought to be difficult to apply the rule. We found that the partial molar volumes of elementsin some Laves phase are not the same with that of pure elements, and it was confirmed by 1st principles calculations. We could successfully modify the old rule for designing of new multi-component alloys. This is a good example of the research strategy of Materials Science and Engineering; the coupling of old,empirical rules with modern physics shed light on alloy designing.

讲座人简介：SEIJI MIURA（三浦诚司）教授为北海道大学著名教授，在超高温材料力学性能、难熔金属合金与金属间化合物、镁合金单晶力学性能以及镁-过渡金属-稀土金属体系相图研究方面取得了大量研究成果，迄今发表学术论文与学术报告超过200篇/次。国际会议邀请报告35次。三浦教授与日本国内诸多院校与公司合作，如与日本东北大学、日本国立材料研究院合作开发难熔金属合金材料；与Mitsubishi 天然气化工公司合作开发Co-Cr基合金材料等。

曾获得学术奖励：

1.本田青年研究者奖

2.日本金属学会青年科学家奖

3.日本金属学会材料突出贡献奖等。

主要研究方向：

1. 超高温材料力学性能研究

2. 难熔合金及金属间化合物

3. 镁合金单晶的力学行为

4. 镁-过渡金属-稀土金属体系相图