ITU Journal of Metallurgy and Materials Engineering 3062-0406 İstanbul Teknik Üniversitesi Material Characterization Malzeme Karekterizasyonu Thermal and Corrosion Properties of Binary Al-Ce alloys İkili Al-Ce Alaşımlarının Termal ve Korozyon Özellikleri Cengiz Sezgin GEBZE TEKNİK ÜNİVERSİTESİ Azaklı Yunus The University of Sheffield https://orcid.org/0000-0002-5463-2674 Coşan Kral Ali GEBZE TEKNİK ÜNİVERSİTESİ Ceylan Ebru NECMETTİN ERBAKAN ÜNİVERSİTESİ Uzunoğlu Aytekin İSTANBUL TEKNİK ÜNİVERSİTESİ https://orcid.org/0000-0002-0289-770X Tarakçı Mehmet GEBZE TEKNİK ÜNİVERSİTESİ Gencer Yücel GEBZE TEKNİK ÜNİVERSİTESİ 07 30 2025 2 2 31 36 07 07 2025 07 26 2025 Copyright © 2024, İTÜ Metalurji ve Malzeme Mühendisliği Dergisi 2024 İTÜ Metalurji ve Malzeme Mühendisliği Dergisi

In this study, binary Al-xCe (x = 1, 2, 4, 8, 12, and 18 wt.%) alloys were synthesized, and the effect of cerium (Ce) on microstructures, thermal, and corrosion properties was systematically investigated. XRD analyses revealed the presence of α-Al and Al₁₁Ce₃ phases in the alloys. The addition of Ce significantly reduced the coefficient of thermal expansion, decreasing from approximately 28.09 × 10⁻⁶ K⁻¹ to 26.50 × 10⁻⁶ K⁻¹. The addition of Ce, especially at low concentrations, adversely affected the corrosion resistance of Al by introducing structural defects into the matrix. The increase in Ce content in the alloys led to an enhancement in its hardness.

Bu çalışmada, ikili Al-xCe (x = 1, 2, 4, 8, 12 ve 18 ağırlıkça %) alaşımları sentezlenmiş ve seryumun (Ce) mikro yapı, termal ve korozyon özellikleri üzerindeki etkisi sistematik olarak incelenmiştir. XRD analizleri, alaşımlarda α-Al ve Al₁₁Ce₃ fazlarının varlığını ortaya koymuştur. Ce ilavesi, termal genleşme katsayısını önemli ölçüde azaltmış; bu değer yaklaşık 28,09 × 10⁻⁶ K⁻¹'den 26,50 × 10⁻⁶ K⁻¹'ye düşmüştür. Özellikle düşük konsantrasyonlardaki Ce ilavesi, matris içine yapısal kusurlar sokarak Al’nin korozyon direncini olumsuz yönde etkilemiştir. Alaşımlardaki Ce içeriğinin artması ise sertliğinde bir artışa neden olmuştur.

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