In this research, the
effects of Cu addition which ranges from 0 % to 1 % to Fe-based Fe0.402Co0.201Ni0.067B0.227Si0.053Nb0.05 and Co-based Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05 glassy ribbons obtained by melt spinning method on
magnetocaloric and magnetoresistance properties were investigated. In this regard, structural analyzes of the
samples were evaluated by XRD, thermal properties were analyzed by DSC
measurements, Curie temperatures were obtained from dM/dT vs temperature curves, magnetic properties were determined by
using M-H and M-T measurements, magnetic entropy changes depending on temperature
were used to determine magnetocaloric properties of the samples. In addition to
these, the temperature dependent magnetoresistances were measured and the
effects of adding Cu element to the composition on magnetoresistance properties
were investigated. As a result, it has been concluded that the appropriate addition
of Cu (about 0.75 %) on Fe- or Co-based metallic glasses enhances
magnetocaloric properties and the proposed composition can probably be used for
magnetic refrigeration at high temperatures.
Bu çalışmada eriyik eğirme yöntemiyle üretilmiş
Fe-tabanlı Fe0,402Co0,201Ni0,067B0,227Si0,053Nb0,05
ve Co-tabanlı Co0,402Fe0,201Ni0,067B0,227Si0,053Nb0,05
amorf şeritlere % 0 ile % 1 arasında değişen oranlarda ilave edilen Cu elementinin
manyetokalorik özellikler ile manyetik direnç üzerine etkisi araştırılmıştır.
Bu çerçevede numunelerin yapısal analizleri XRD, ısıl analizleri DSC
ölçümleriyle, Curie sıcaklıkları dM/dT
- sıcaklık eğrileriyle, manyetik özellikler M-H
ve M-T ölçümleriyle belirlenmiş,
manyetik entropi değişimi ile sıcaklık arasındaki ilişki yardımıyla örneklerin
sahip oldukları manyetokalorik özellikler belirlenmiştir. Bunlara ilave olarak,
sıcaklığa bağlı manyetik direnç ölçümleri gerçekleştirilerek kompozisyona Cu
elementi eklenmesinin manyetik dirence olan etkileri araştırılmıştır. Bu
çalışmanın sonucunda, Fe- ve Co-tabanlı metalik cam şeritlerde tüm kompozisyona
uygun miktarda (yaklaşık % 0,75) Cu ilavesinin manyetokalorik özellikleri
önemli ölçüde geliştirdiği görülmüş ve teklif edilen kompozisyonun yüksek
sıcaklıklarda manyetik soğutma amacıyla kullanılabileceği değerlendirilmiştir.
Primary Language | Turkish |
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Subjects | Engineering |
Journal Section | Research Articles |
Authors | |
Publication Date | August 30, 2019 |
Submission Date | October 8, 2018 |
Acceptance Date | June 14, 2019 |
Published in Issue | Year 2019 Volume: 24 Issue: 2 |
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