Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy
Phase separation and crystallization behavior in melt-spun Al63Si25Ni12 amorphous alloy have been investigated in the present study. Although there is no atomic pair with positive enthalpy of mixing, nm scale phase separation occurs in the as-melt-spun amorphous alloy, exhibiting double-halo diffrac...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-07-01
|
| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520302537 |
| _version_ | 1818772864404291584 |
|---|---|
| author | J.I. Hyun C.I. Kim S.W. Nam W.T. Kim D.H. Kim |
| author_facet | J.I. Hyun C.I. Kim S.W. Nam W.T. Kim D.H. Kim |
| author_sort | J.I. Hyun |
| collection | DOAJ |
| description | Phase separation and crystallization behavior in melt-spun Al63Si25Ni12 amorphous alloy have been investigated in the present study. Although there is no atomic pair with positive enthalpy of mixing, nm scale phase separation occurs in the as-melt-spun amorphous alloy, exhibiting double-halo diffraction pattern. The amorphous matrix consisting of two different nm-scale Al-rich and Si-rich amorphous phases polymorphically crystallizes into a metastable hexagonal phase by an interface-controlled nucleation and growth mechanism in the first step of crystallization. The metastable hexagonal phase transforms into the mixture of α-Al, Si and Al3Ni phases possibly by a ternary eutectoid reaction in the second step of crystallization. |
| first_indexed | 2024-12-18T10:16:08Z |
| format | Article |
| id | doaj.art-8fade24540074a808ca80c73b665c019 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-18T10:16:08Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-8fade24540074a808ca80c73b665c0192022-12-21T21:11:17ZengElsevierMaterials & Design0264-12752020-07-01192108719Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloyJ.I. Hyun0C.I. Kim1S.W. Nam2W.T. Kim3D.H. Kim4Department of Materials Science & Engineering, Yonsei University, Seoul 03722, Republic of KoreaDepartment of Materials Science & Engineering, Yonsei University, Seoul 03722, Republic of KoreaDepartment of Materials Science & Engineering, Yonsei University, Seoul 03722, Republic of KoreaDepartment of Laser & Optical Information Engineering, Cheongju University, Cheongju 28503, Republic of KoreaDepartment of Materials Science & Engineering, Yonsei University, Seoul 03722, Republic of Korea; Corresponding author.Phase separation and crystallization behavior in melt-spun Al63Si25Ni12 amorphous alloy have been investigated in the present study. Although there is no atomic pair with positive enthalpy of mixing, nm scale phase separation occurs in the as-melt-spun amorphous alloy, exhibiting double-halo diffraction pattern. The amorphous matrix consisting of two different nm-scale Al-rich and Si-rich amorphous phases polymorphically crystallizes into a metastable hexagonal phase by an interface-controlled nucleation and growth mechanism in the first step of crystallization. The metastable hexagonal phase transforms into the mixture of α-Al, Si and Al3Ni phases possibly by a ternary eutectoid reaction in the second step of crystallization.http://www.sciencedirect.com/science/article/pii/S0264127520302537Amorphous alloyPhase separationCrystallization behaviorAtom probe |
| spellingShingle | J.I. Hyun C.I. Kim S.W. Nam W.T. Kim D.H. Kim Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy Materials & Design Amorphous alloy Phase separation Crystallization behavior Atom probe |
| title | Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy |
| title_full | Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy |
| title_fullStr | Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy |
| title_full_unstemmed | Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy |
| title_short | Nanoscale phase separation and microstructure evolution during crystallization in Al-Si-Ni amorphous alloy |
| title_sort | nanoscale phase separation and microstructure evolution during crystallization in al si ni amorphous alloy |
| topic | Amorphous alloy Phase separation Crystallization behavior Atom probe |
| url | http://www.sciencedirect.com/science/article/pii/S0264127520302537 |
| work_keys_str_mv | AT jihyun nanoscalephaseseparationandmicrostructureevolutionduringcrystallizationinalsiniamorphousalloy AT cikim nanoscalephaseseparationandmicrostructureevolutionduringcrystallizationinalsiniamorphousalloy AT swnam nanoscalephaseseparationandmicrostructureevolutionduringcrystallizationinalsiniamorphousalloy AT wtkim nanoscalephaseseparationandmicrostructureevolutionduringcrystallizationinalsiniamorphousalloy AT dhkim nanoscalephaseseparationandmicrostructureevolutionduringcrystallizationinalsiniamorphousalloy |