Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons
The nanocrystallization of Co67Fe4Cr7Si8B14 amorphous ribbons which prepared by planar flow melt spinning process (PFMS) was investigated. Crystallization of the ribbons was studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The DTA re...
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| Format: | Article |
| Language: | English |
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University of Tehran
2013-12-01
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| Series: | Journal of Ultrafine Grained and Nanostructured Materials |
| Subjects: | |
| Online Access: | http://jufgnsm.ut.ac.ir/article_35913_6403a04e5282d0a653736906f5b00a2c.pdf |
| _version_ | 1818671787158798336 |
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| author | Zahra Jamili-Shirvan Mohsen H. Sabzevar |
| author_facet | Zahra Jamili-Shirvan Mohsen H. Sabzevar |
| author_sort | Zahra Jamili-Shirvan |
| collection | DOAJ |
| description | The nanocrystallization of Co67Fe4Cr7Si8B14 amorphous ribbons which prepared by planar flow melt spinning process (PFMS) was investigated. Crystallization of the ribbons was studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The DTA result of amorphous ribbon at heating rate of 10˚C/min showedoccurrence of phase transitions in two stages. The ribbons were isothermally annealed for 30 minutes in argon atmosphere at different temperatures between 300 and 650ºC with 25ºC steps. The magnetic properties of annealed samples were measured using a vibrating sample magnetometer (VSM). The VSM results revealed that optimum soft magnetic properties occurred at 400ºC. XRD patterns showed that the samples isothermally annealed up to 450ºC were amorphous, while TEM results at 400ºC indicated 7-8 nm mean size nanocrytallites in amorphous matrix and size of the nanocrystallites increased by increasing temperature. Also by X-ray diffraction pattern, precipitation of different phases at higher temperatures confirmed. |
| first_indexed | 2024-12-17T07:29:33Z |
| format | Article |
| id | doaj.art-233d6114ea8f41d7baf4c5cda0c1bba1 |
| institution | Directory Open Access Journal |
| issn | 2423-6845 2423-6837 |
| language | English |
| last_indexed | 2024-12-17T07:29:33Z |
| publishDate | 2013-12-01 |
| publisher | University of Tehran |
| record_format | Article |
| series | Journal of Ultrafine Grained and Nanostructured Materials |
| spelling | doaj.art-233d6114ea8f41d7baf4c5cda0c1bba12022-12-21T21:58:32ZengUniversity of TehranJournal of Ultrafine Grained and Nanostructured Materials2423-68452423-68372013-12-01461555910.7508/jufgnsm.2013.01.00835913Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy RibbonsZahra Jamili-Shirvan0Mohsen H. Sabzevar1PhD Candidate in Material Engineering Dept of Materials Engineering and Metallurgy, Faculty of Engineering, Ferdowsi University of Mashhad.Department of Materials Engineering and Metallurgy, Faculty of Engineering, Ferdowsi University of Mashhad, Iran.The nanocrystallization of Co67Fe4Cr7Si8B14 amorphous ribbons which prepared by planar flow melt spinning process (PFMS) was investigated. Crystallization of the ribbons was studied by differential thermal analysis (DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The DTA result of amorphous ribbon at heating rate of 10˚C/min showedoccurrence of phase transitions in two stages. The ribbons were isothermally annealed for 30 minutes in argon atmosphere at different temperatures between 300 and 650ºC with 25ºC steps. The magnetic properties of annealed samples were measured using a vibrating sample magnetometer (VSM). The VSM results revealed that optimum soft magnetic properties occurred at 400ºC. XRD patterns showed that the samples isothermally annealed up to 450ºC were amorphous, while TEM results at 400ºC indicated 7-8 nm mean size nanocrytallites in amorphous matrix and size of the nanocrystallites increased by increasing temperature. Also by X-ray diffraction pattern, precipitation of different phases at higher temperatures confirmed.http://jufgnsm.ut.ac.ir/article_35913_6403a04e5282d0a653736906f5b00a2c.pdfAmorphous AlloyTransmission Electron MicroscopyNanocrystallization, Soft Magnetic PropertiesXRD |
| spellingShingle | Zahra Jamili-Shirvan Mohsen H. Sabzevar Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons Journal of Ultrafine Grained and Nanostructured Materials Amorphous Alloy Transmission Electron Microscopy Nanocrystallization, Soft Magnetic Properties XRD |
| title | Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons |
| title_full | Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons |
| title_fullStr | Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons |
| title_full_unstemmed | Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons |
| title_short | Nanocrystallization in Co67Cr7Fe4Si8B14 Amorphous Alloy Ribbons |
| title_sort | nanocrystallization in co67cr7fe4si8b14 amorphous alloy ribbons |
| topic | Amorphous Alloy Transmission Electron Microscopy Nanocrystallization, Soft Magnetic Properties XRD |
| url | http://jufgnsm.ut.ac.ir/article_35913_6403a04e5282d0a653736906f5b00a2c.pdf |
| work_keys_str_mv | AT zahrajamilishirvan nanocrystallizationinco67cr7fe4si8b14amorphousalloyribbons AT mohsenhsabzevar nanocrystallizationinco67cr7fe4si8b14amorphousalloyribbons |