저온 분사 코팅 공정에서 충돌속도에 따른 CuNiTiZr 벌크 비정질 소재의 활성화 에너지와 결정화 거동 분석
Effects of Impact Velocity on Crystallization and Activation Energy of Cu-based Bulk Metallic Glasses in Kinetic Spray Coating
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this paper, nanocrystallization of CuNiTiZr bulk metallic glass (BMG) subjecting to a kinetic spraying, dependent on impact velocity, was investigated by numerical and experimental approaches. The crystallization fraction and nucleation activation energy of initial feedstock and as-deposited coating were estimated by DSC and Kissinger method, respectively. The results of numerical modeling and experiment showed that the crystalline fraction and nucleation activation energy in BMG coatings were depended on kinetic energy of incident particle. Upon impact, the conversion of particle kinetic energy leads to not only decreasing free energy barrier but also increasing the driving force for an amorphous to crystalline phase transformation. The nanocrystallization of BMGs is associated with the strain energy delivered by a plastic deformation with a high strain rate.
참고문헌 (8)
- Thierry Gloriant, , J. Non-Crystalline Solids, 316, pp.96~103 (2003)
- A. L. Greer, , Materials Science and Engineering A, 304-306, pp.68~72 (2001)
- S. H. Yoon, , Materials Science & Engineering A, 415, pp.45~52 (2006)
- S. H. Yoon, , Surface and Coatings Technology, 200, pp.6022~6029 (2006)
- H. E. Kissinger, , J. Res. Natl. Bur. Stand, 57, pp.217~ (1956)
- J. Wu, , Appl. Surf. Sci, 252, pp.1368~ (2005)
- G. Bae, , Acta Mater, 56, pp.4858~ (2008)
- T. Schmidt, , Acta Mater, 54, pp.729~ (2006)