Cu – ESASLI ŞEKİL HATIRLAMA ALAŞIMLARINDA OKSİDASYON ÖZELLİKLERİNE ALAŞIM ELEMENTLERİNİN ETKİSİ

Dört farklı kompozisyonlu Cu-esaslı şekil hatırlama alaşımlarının yüksek sıcaklık oksitlenme özellikleri hava atmosferi altında 150 °C - 900 °C sıcaklık aralıklarında thermogravimetrik analiz (TGA) ile incelendi. Isıtma hızı ve alaşımlama elementlerinin çeşidine bağlı olarak toz numuneler incelendi ve oxsitlenme hızları TGA ile belirlendi. Sonuçlar işaret edilen alaşımlarda artan Al içeriği ve artan ısıtma hızına bağlı olarak, oksidasyon hızının arttığını gösterdi.

Anahtar Kelimeler:

Alaşım, Oksitlenme, Thermogravimetrik Analiz (TGA)

THE EFFECT TO OXIDATION BEHAVIOUR OF ALLOY ELEMENTS IN THE Cu – BASED SHAPE MEMORY ALLOYS

High temperature oxidation behaviours of with four different composition Cu-based shape memory alloys have been investigated by thermogravimetric analysis (TGA) in the temperature range of 150 °C - 900 °C under air atmosphere. Depending on the heating rate and the alloying elements types, the weight gains of the powdered samples were investigated and the oxidation rates have been determined by TGA. The results indicate that increasing of Al content in the alloys and increasing the heating rate, increase the rate of oxidation.

Keywords:

Alloy, Oxidation, Thermogravimetry Analysis (TGA),

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