İleri Mühendislik Malzemelerinde Nadir Toprak Elementleri: Uygulamalar, Termodinamik Davranış, İşleme ve Mekanik Performans Üzerine Eleştirel Bir Derleme

Öz

Nadir toprak elementleri (NTE), lantanitler ile birlikte skandiyum ve itriyumdan oluşan, kimyasal olarak benzer ancak kullanım alanları açısından kritik öneme sahip 17 elementten oluşmaktadır. Hafif ve ağır nadir toprak elementleri olarak sınıflandırılan bu grup; manyetik, optik, katalitik, elektriksel ve mekanik özellikleri sayesinde günümüz yüksek teknoloji ürünlerinin vazgeçilmez bileşenleri haline gelmiştir. Her ne kadar bazı NTE’ler yerkabuğunda bol bulunsa da, saflaştırma zorlukları ve jeokimyasal davranışları nedeniyle “nadir” olarak tanımlanmaktadır. Küresel enerji dönüşümü, elektrikli araçlar, rüzgâr türbinleri ve yenilenebilir enerji teknolojilerinin yaygınlaşmasıyla birlikte NTE’lere olan talebi önemli ölçüde artırmıştır. Özellikle neodimyum, praseodimyum, disprozyum ve terbiyum gibi elementler kalıcı mıknatıs üretiminde kritik rol oynamaktadır. NdFeB ve Sm-Co esaslı mıknatıslar; elektrik motorları, jeneratörler, savunma sanayi, rüzgâr türbinleri ve elektronik cihazlarda yüksek verimlilik sağlamaktadır. Sonuç olarak, nadir toprak elementleri; enerji verimliliği, çevreci teknolojiler ve ileri mühendislik malzemelerinin geliştirilmesinde stratejik öneme sahiptir. Artan talep ve tedarik riskleri nedeniyle geri dönüşüm, alternatif malzeme geliştirme ve sürdürülebilir madencilik yaklaşımları gelecekte daha da önem kazanacaktır.

Anahtar Kelimeler

• Nadir toprak elementleri
• Kalıcı mıknatıslar
• Yenilenebilir enerji teknolojileri
• Elektrikli araçlar
• Metalurjik uygulamalar

Etik Beyan

Bu çalışmanın yayımlanmasına ilişkin herhangi bir etik sorun bulunmamaktadır. Bu çalışma bir derleme makalesi niteliğinde olup insan katılımcıları, deney hayvanları veya herhangi bir deneysel uygulama içermediğinden etik kurul onayı gerekmemektedir.

Rare Earth Elements in Advanced Engineering Materials: A Critical Review of Applications, Thermodynamic Behavior, Processing and Mechanical Performance

Öz

Rare earth elements (REEs) consist of a group of 17 elements, including the lanthanides together with scandium and yttrium, which are chemically similar yet critically important due to their wide range of applications. Classified as light and heavy rare earth elements, this group has become indispensable in modern high-technology products owing to their unique magnetic, optical, catalytic, electrical, and mechanical properties. Although some REEs are relatively abundant in the Earth’s crust, they are referred to as “rare” due to difficulties in extraction and separation as well as their distinctive geochemical behavior. The global energy transition has significantly increased the demand for rare earth elements, driven by the rapid expansion of electric vehicles, wind turbines, and renewable energy technologies. In particular, elements such as neodymium, praseodymium, dysprosium, and terbium play a critical role in the production of permanent magnets. NdFeB- and Sm–Co-based magnets provide high efficiency in electric motors, generators, defense systems, wind turbines, and electronic devices. In conclusion, rare earth elements hold strategic importance in improving energy efficiency, enabling environmentally friendly technologies, and advancing modern engineering materials. Due to increasing demand and supply risks, recycling, alternative material development, and sustainable mining approaches are expected to become increasingly important in the future.

Anahtar Kelimeler

• Rare earth elements
• Permanent magnets
• Renewable energy technologies
• Electric vehicles
• Metallurgical applications

Etik Beyan

There are no ethical issues regarding the publication of this study. Ethics committee approval was not required because this study is a review article and does not involve human participants, animals, or experimental procedures.

Kaynakça

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