【公開日：2024.07.25】【最終更新日：2024.05.17】

課題データ / Project Data

課題番号 / Project Issue Number

23TU0030

利用課題名 / Title

Crystallization of metallic glasses

利用した実施機関 / Support Institute

東北大学 / Tohoku Univ.

機関外・機関内の利用 / External or Internal Use

外部利用/External Use

技術領域 / Technology Area

【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-

【重要技術領域 / Important Technology Area】（主 / Main）次世代ナノスケールマテリアル/Next-generation nanoscale materials（副 / Sub）高度なデバイス機能の発現を可能とするマテリアル/Materials allowing high-level device functions to be performed

キーワード / Keywords

metallic glass,電子顕微鏡/ Electronic microscope,集束イオンビーム/ Focused ion beam

利用者と利用形態 / User and Support Type

利用者名（課題申請者）/ User Name (Project Applicant)

Louzguine Dmitri Valentinovich

所属名 / Affiliation

産業技術総合研究所 オープンイノベーションラボラトリ

共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes

ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes

伊藤俊,竹中佳生,兒玉裕美子

利用形態 / Support Type

（主 / Main）技術代行/Technology Substitution（副 / Sub）,機器利用/Equipment Utilization

利用した主な設備 / Equipment Used in This Project

TU-504：超高分解能透過電子顕微鏡
TU-517：透過電子顕微鏡
TU-508：集束イオンビーム加工装置
TU-507：集束イオンビーム加工装置

報告書データ / Report

概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)

As known, the bulk amorphous alloys constitute one of the most promising materials families for future society, where better and stronger materials are required for future sustainable society. Since amorphous alloys are in the metastable state, they are always prone to crystallization, which in fact proceeds via various paths depending on temperature and mechanical deformation. In this study, we examined the structural stability and crystallization behavior of mechanically scratched metallic glasses by using transmission electron microscopy.

実験 / Experimental

Bulk amorphous alloys have been prepared by the conventional method, and they were subject to the mixture of compressive and shear stress in an atomic force microscope with a diamond cantilever. In order to observe possible structural changes under the scratched area, we employed focused ion beam apparatus (FIB) for thin specimen preparation and transmission electron microscopy (TEM) for atomic level detailed observations.

結果と考察 / Results and Discussion

Fig. 1 shows a low magnification image of the Pd-Cu-Ni-P bulk amorphous specimen to see the overall quality of the material and the scratch (wear track) profile within the lamella coated by a protection layer.  No particular contrast from the body of the material indicates the amorphous state was retained under the mechanical deformation. Fig. 2 shows a high-resolution image near the wear track/scratch and a diffraction pattern, where a halo ring can be recognized. These observations confirm that the present characterization methods pave the way to future processing development.

図・表・数式 / Figures, Tables and Equations

Fig. 1. TEM image of a mechanically deformed bulk amorphous alloy prepared by FIB.

Fig. 2. A phase contrast image and diffraction pattern (inset) of the specimen under the wear track, showing the amorphous state.

その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)

成果発表・成果利用 / Publication and Patents

論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)

口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.

特許 / Patents

特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件