Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying
Nanomagnetic materials have been widely employed in the industry as they possess special magnetic properties. Nickel based soft magnetic materials which have low coercivity and high permeability have been used on recording heads, transformers and magnetic shielding materials. The aim of this final y...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2009
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| Online Access: | http://hdl.handle.net/10356/15439 |
| _version_ | 1826110814821548032 |
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| author | Sim, Wenchao. |
| author2 | Oh Joo Tien |
| author_facet | Oh Joo Tien Sim, Wenchao. |
| author_sort | Sim, Wenchao. |
| collection | NTU |
| description | Nanomagnetic materials have been widely employed in the industry as they possess special magnetic properties. Nickel based soft magnetic materials which have low coercivity and high permeability have been used on recording heads, transformers and magnetic shielding materials. The aim of this final year project is to investigate the effects of mechanical alloying of Ni0.77Fe0.16Cu0.05Cr0.02 (mumetal) on its magnetic properties. The mumetal powders are synthesized by planetary high energy ball milling under argon atmosphere for milling ranging from 0 hr to 96 hr. Subsequently, investigation and evaluation on the crystallite size, composition and morphology by the use of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The magnetic properties were examined by vibrating sample magnetometer (VSM). Results shown that with increasing milling time, the particle size decreases and after 12 hrs, crystallite size of 12nm mumetal was formed. The lattice parameter increases due to the binding of different elements of different lattice parameters. Saturation magnetization increases with milling time whereas the coercivity and retentivity have an opposite effect. |
| first_indexed | 2024-10-01T02:40:39Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/15439 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:40:39Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/154392023-03-04T15:38:45Z Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying Sim, Wenchao. Oh Joo Tien School of Materials Science and Engineering DRNTU::Engineering Nanomagnetic materials have been widely employed in the industry as they possess special magnetic properties. Nickel based soft magnetic materials which have low coercivity and high permeability have been used on recording heads, transformers and magnetic shielding materials. The aim of this final year project is to investigate the effects of mechanical alloying of Ni0.77Fe0.16Cu0.05Cr0.02 (mumetal) on its magnetic properties. The mumetal powders are synthesized by planetary high energy ball milling under argon atmosphere for milling ranging from 0 hr to 96 hr. Subsequently, investigation and evaluation on the crystallite size, composition and morphology by the use of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The magnetic properties were examined by vibrating sample magnetometer (VSM). Results shown that with increasing milling time, the particle size decreases and after 12 hrs, crystallite size of 12nm mumetal was formed. The lattice parameter increases due to the binding of different elements of different lattice parameters. Saturation magnetization increases with milling time whereas the coercivity and retentivity have an opposite effect. Bachelor of Engineering (Materials Engineering) 2009-04-30T01:34:50Z 2009-04-30T01:34:50Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/15439 en Nanyang Technological University 52 p. application/pdf |
| spellingShingle | DRNTU::Engineering Sim, Wenchao. Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title | Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title_full | Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title_fullStr | Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title_full_unstemmed | Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title_short | Understanding the structural and magnetic properties of Ni0.77Fe0.16Cu0.05Cr0.02 by mechanical alloying |
| title_sort | understanding the structural and magnetic properties of ni0 77fe0 16cu0 05cr0 02 by mechanical alloying |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/15439 |
| work_keys_str_mv | AT simwenchao understandingthestructuralandmagneticpropertiesofni077fe016cu005cr002bymechanicalalloying |