Unveiling the influence of CeO₂ rare-earth oxide content on in-situ phase formation and properties of aluminium matrix composites

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Erol M., BAYRAK Y., ÖZBAY KISASÖZ B., Yılmaz M. A., Özkan D., KISASÖZ A.

CERAMICS INTERNATIONAL, cilt.51, sa.28, ss.57819-57831, 2025 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 51 Sayı: 28
• Basım Tarihi: 2025
• Doi Numarası: 10.1016/j.ceramint.2025.09.482
• Dergi Adı: CERAMICS INTERNATIONAL
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
• Sayfa Sayıları: ss.57819-57831
• Anahtar Kelimeler: CeO2(D), Composites (B), Corrosion (C), Hot pressing (A)
• Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this study, the hot pressing technique was used to produce Al-CeO2 composites. Furthermore, the effects of CeO2 content on in-situ phase formation and the properties of the composites were systematically investigated. The samples were fabricated at 600 degrees C at 1, 5 and 10 wt% CeO2 content. The in-situ phases could not be observed at 1 and 5 wt% CeO2 ratios. However, intermetallic phases and complex oxides like Al11Ce3 and Al11CeO18 were identified in the sample containing 10 wt% CeO2. It was revealed that 5 wt% CeO2 containing composite exhibited superior wear resistance and the wear rate of the aluminium was decreased from 9.851.10-4 mm3/Nm to 2.562.10-4 mm3/Nm. It was observed that the in-situ formed oxide deteriorated the wear properties of the composite, and the wear resistance of Al-CeO2-10 was reduced. Also, increasing CeO2 content provided the formation of in-situ oxides and stabilized the surface. Accordingly, the wear rate of the aluminium was improved up to 0.0548 mm/year owing to the existence of 10 wt% CeO2. The surface stability of the composite was enhanced with CeO2 particles, and the corrosion damage shifted the CeO2 and complex oxides containing regions.