Barış AVAR, Tuncay ŞİMŞEK, Musa GÖĞEBAKAN

Mekanik Alaşımlama ile Üretilen Nanokristal Fe60Al30Cu10 (at.%) Tozların Yapısal ve Mekanik Özellikleri

Bu çalışmada, nanoyapılı Fe (Al,Cu) katı çözeltisi, elementel tozların mekanik alaşımlama (MA) işlemi ile sentezlenmiştir. Toz karışımlar, 50 saatlik öğütme süresince çeşitli zaman aralıklarında gezegensel bilyeli değirmende öğütülmüştür. Numunelerin yapısal ve mekanik özellikleri X-ışını difraksiyonu (XRD), taramalı elektron mikroskobu/ enerji dağılımlı X-ışını spektroskopisi (SEM/ EDX) ve Vickers mikrosertlik (HV) testi ile incelenmiştir. 10 saatlik öğütme işleminden sonra bütün Al ve Cu atomları ymk-Fe (Al,Cu) katı çözeltisini oluşturmak üzere Fe kafesi içerinde çözünmüştür. Toz alaşımların parçacık morfolojisi öğütme süreleri boyunca soğuk kaynaklanma, kırılma ve kararlı durum aşamalarını göstermiştir. 50 saatlik öğütme işleminden sonra parçacık boyutu ve kristalit boyutu, sırasıyla ~ 500 nm ve ~ 6 nm’ ye düşmüştür. Bununla birlikte, mikrosertlik değerleri artan öğütme süresiyle birlikte artmıştır.

Anahtar Kelimeler:

Mekanik alaşımlama, Fe-Al-Cu alaşımı, XRD, SEM, Vickers sertlik

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