Direct observation of supercooled liquid state in metallic glasses

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656400
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: HIRATA Akihiko 東北大学, 原子分子材料科学高等研究機構, 准教授 (90350488)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 金属ガラス / 過冷却液体 / 電子顕微鏡

Outline of Final Research Achievements

We have conducted an in-situ heating experiment of the supercooled liquid state to clarify a mechanism of the glass formation process. When the in-situ observation of a Pd-based metallic glass was carried out in a transmission electron microscope, it was found that striation contrasts appeared around the glass transition temperature (Tg) due to softening of the sample and crystallization occurred at the temperature 20K higher than Tg. In this study we could not gain the information of local atomic structures due to a large drift of the sample, but we indicated possibility of the experiment by using some advanced camera.

Free Research Field

材料科学