Mekanik Alaşımlama ile Sentezlenen Eş-molar Fe-Si-Cu/Nb (at.%) Nanokristallerinin Yapısal, Morfolojik ve Manyetik Özelliklerinin Araştırılması

Yıl 2023, , 871 - 882, 29.12.2023

Seval Hale Güler , Doç.dr. Tuncay Şimşek

https://doi.org/10.53433/yyufbed.1240484

Öz

Bu çalışmada mekanik alaşımlama yöntemi ile Argon atmosferi altında eş molar nanokristal Fe-Si-Cu (at.%) ve Fe-Si-Nb (at.%) alaşımları sentezlenmiştir. Deney parametreleri 350 rpm, 10:1 BPR, 120 saat olarak belirlenmiştir. Sentezlenen alaşımların faz yapıları X-Işınları difraktometresi ile, morfoloji ve elementel analizleri SEM-EDS ile, manyetik özellikleri ise oda sıcaklığında titreşimli örnek manyetometresi (VSM) tekniği ile araştırılmıştır. Fe-Si-Cu alaşımının kristalit boyutu öğütme başlangıcı, 30, 60 ve 120 saat öğütme sonrası sırasıyla 102.3, 22.5, 15.9 ve 8.6 nm, örgü gerinimleri ise % 0.164, % 0.510, %0.672 ve %1.165 olarak bulunurken, Fe-Si-Nb alaşımı için ise kristalit boyutlar 140.8, 42.9, 16.8 ve 7.8 nm, örgü gerinimleri ise % 0.134, % 0.301, % 0.639 ve % 1.271 olarak hesaplanmıştır. Manyetizma sonuçlarına göre, Fe-Si-Cu (at.%) alaşımının doyum manyetizasyonu (Ms) 3146 emu/g olarak bulunurken, Fe-Si-Nb (at.%) alaşımının doyum manyetizasyonu 8.91 emu/g olarak bulunmuştur. Fe-Si alaşım sistemine Nb katkısının kuarzivite değerlerinde artışa sebep olduğu belirlenmiştir.

Anahtar Kelimeler

Fe-Si alaşımları, Manyetik malzemeler, Mekanik alaşımlama, Nano malzemeler, SEM, XRD

Teşekkür

Yazarlar, manyetizma analizleri için, Hacettepe Fizik Mühendisliği, Süperiletkenlik ve NanoTeknoloji Grubu (SNTG) labaratuvarına teşekkür etmektedir.

Investigation of Structural, Morphological and Magnetic Properties of Equi-molar Fe-Si-Cu/Nb (at.%) Nanocrystals Synthesized by Mechanical Alloying

Öz

In this study, equimolar nanocrystalline Fe-Si-Cu (at.%) and Fe-Si-Nb (at.%) alloys were synthesized under an Argon atmosphere by a mechanical alloying method. Experimental parameters were determined as 350 rpm, 10:1 BPR, 120 hours. Phase structures of the synthesized alloys were investigated by X-Ray diffractometry, morphology and elemental analyzes were investigated by SEM-EDS, and magnetic properties were investigated by vibrating sample magnetometer (VSM) technique at room temperature. The crystallite size of the Fe-Si-Cu alloy was found to be 102.3, 22.5, 15.9 and 8.6 nm at the beginning of grinding, after 30, 60 and 120 hours grinding, respectively, and the lattice strains were 0.164%, 0.510%, 0.672% and 1.165%, while the Fe-Si-Cu alloy For the Nb alloy, the crystallite sizes were calculated as 140.8, 42.9, 16.8 and 7.8 nm, and the lattice strains were calculated as 0.134%, 0.301%, 0.639% and 1.271%. According to the magnetism results, the saturation magnetization (Ms) of the Fe-Si-Cu (at.%) alloy was found to be 3146 emu/g, while the saturation magnetization of the Fe-Si-Nb (at.%) alloy was found to be 8.91 emu/g. It was determined that Nb addition to the Fe-Si alloy system caused an increase in the coercivity values.

Anahtar Kelimeler

Fe-Si alloys, Magnetic materials, Mechanical alloying, Nanomaterials, SEM, XRD

Kaynakça

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