APT와 TEM을 활용한 NbCoSn 비정질 합금의 결정화 거동 분석

• 영문명: Characterization of the Crystallization Behavior of NbCoSn Amorphous Alloy using APT and TEM
• 발행기관: 한국세라믹학회
• 저자명: 정찬원(Chanwon Jung)
• 간행물 정보: 『세라미스트』제28권 제2호, 271~280쪽, 전체 10쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2025.06.30

국문 초록

Nanostructured materials are conventionally synthesized by mechanically alloying bulk ingots via ball milling, followed by consolidation through powder sintering. However, the conventional approach is limited in its ability to precisely control the microstructure. On the other hand, nanocrystallization from an amorphous precursor offers a more versatile and controllable route for engineering nanostructures. This approach enables precise modulation of crystallization kinetics and microstructural evolution through careful adjustment of annealing parameters such as temperature and time. Advanced characterization techniques, such as atom probe tomography (APT) and transmission electron microscopy (TEM), facilitate the elucidation of fundamental crystallization behavior in amorphous alloys. In the present study, we employed a correlative analytical methodology combining APT and TEM to investigate the nanoscale structural evolution of amorphous NbCoSn alloys during thermal annealing. APT provided three-dimensional, atomic-scale mapping of compositional distributions and elemental segregation, while TEM offered complementary insights into crystallographic structure, grain morphology, and segregation behavior. This integrated approach provides a comprehensive understanding of crystallization behavior and establishes a foundation for the rational design of high-performance materials via controlled nanocrystallization of amorphous precursors.

목차

1. 서론

2. 실험방법

3. 결과 및 토의

4. 결론

REFERENCES

키워드

Atom probe tomography Correlative analysis Crystallization Half-Heusler compounds Transmission electron microscopy