2016 Fiscal Year Final Research Report
Multi-dimensional single crystal formation by pulsed laser melting in liquid
| Project/Area Number |
15K14141
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Composite materials/Surface and interface engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | パルスレーザー溶融法 / 電子後方散乱回折 / サブミクロン球状粒子 / バルク金属ガラス / 再結晶化 |
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| Outline of Final Research Achievements |
Pulsed laser melting in liquid (PLML) is a novel technique to produce submicron spherical particles (SSPs) of various materials. In the process, SSPs is formed by irradiation of laser pulses into a colloidal dispersion. Inner structure of Ag SSPs was evaluated by electron backscattering diffraction (EBSD) using a bulk metallic glass with no EBSD as a substrate for the measurement. Local structure of silver SSPs is crystalline although the feature of SSPs is totally spherical. It is considered that this fascinating materials are produced through nonlinear melting and cooling processes. It was assumed that multidimensional single crystal bulk materials could be formed from those of polycrystal by applying PLML. However no effects were confirmed in the process. Accordingly, it is considered that small crystalline size of raw materials is important for the recrystallization through PLML.
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| Free Research Field |
レーザープロセッシング
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