NANO SERAMİK TAKVİYELİ ÜRETİLEN POLİMER KOMPOZİTLERİN KURU VE ALKİL BAZLI YAĞLI KOŞULLAR ALTINDAKİ TRİBOLOJİK ÖZELLİKLERİNİN ARAŞTIRILMASI

Yıl 2025, Cilt: 33 Sayı: 3, 1947 - 1954, 19.12.2025

Gökçe Mehmet Ay , Esad Kaya

https://doi.org/10.31796/ogummf.1672479

Öz

Bu çalışma, kuru ve polyalphaolefin (PAO) yağlanmış koşullar altında ultra yüksek moleküler ağırlıklı polietilen (UHMWPE) kompozitlerinin tribolojik performansı üzerindeki Al₂O₃ nanopartiküllerin etkisini araştırmaktadır. Deneysel değerlendirmeler, sürtünme katsayısı, aşınma oranı ve sertlik ölçümlerini içerirken, aşınma izlerinin optik mikroskopisi ile desteklenmiştir. Sonuçlar, Al₂O₃ nanopartiküllerin eklenmesinin kuru koşullar altında sürtünme ve aşınma oranlarını önemli ölçüde azalttığını, özellikle daha yüksek dolgu oranlarında (4 wt%) gösterdiğini ortaya koymuştur. PAO ile yağlama sürtünmeyi daha da azaltırken, yüksek dolgu içeriği (4 wt%) ise hafif bir şekilde sürtünmeyi artırmış ve partikül aglomerasyonu nedeniyle periyodik osilasyonlara yol açmıştır. Sertlik, Al₂O₃ içeriği arttıkça düzenli bir şekilde artarak nanopartiküllerin güçlendirici etkisini göstermiştir. Optik mikroskopi, aşınma mekanizmalarını doğrulamış ve yüksek dolgu yüklemelerinde partikül ayrışması sorunlarını vurgulamıştır. UHMWPE-Al₂O₃ kompozitlerinin tribolojik avantajlarını maksimize etmek için dolgu dağılımının optimize edilmesi ve uygun nanoparçacık konsantrasyonlarının korunması gerekmektedir. Potansiyel uygulamalar arasında rulman bileşenleri, biyomedikal implantlar ve endüstriyel sürtünmeli arayüzler yer almakta olup, nanopartikül aglomerasyonunun yönetilmesinde zorluklar devam etmektedir.

Anahtar Kelimeler

UHMWPE , Triboloji , Kompozit

INVESTIGATION OF TRIBOLOGICAL PROPERTIES OF POLYMER COMPOSITES PRODUCED WITH NANO CERAMIC REINFORCEMENT UNDER DRY AND ALKYL BASED OIL CONDITIONS

Öz

This study investigates the influence of Al₂O₃ nanoparticles on the tribological performance of ultra-high molecular weight polyethylene (UHMWPE) composites under dry and polyalphaolefin (PAO)-lubricated conditions. Experimental evaluations included measurements of friction coefficient, wear rate, and hardness, complemented by optical microscopy of wear tracks. Results indicated that incorporating Al₂O₃ cut μ from 0.12 to 0.07 and V̇ from 4.3 × 10⁻⁶ to 1.6 × 10⁻⁶ mm³ N⁻¹ m⁻¹ under dry sliding (4 wt % filler). With PAO, an optimum 2 wt % loading yielded μ ≈ 0.05 and V̇ ≈ 1.1 × 10⁻⁶ mm³ N⁻¹ m⁻¹. Hardness rose by ≈ 22 %,confirming the reinforcing effect of the nanoparticles. Optical microscopy confirmed ploughing wear mechanisms and highlighted issues of particle segregation at elevated filler loadings. Optimizing filler dispersion and maintaining appropriate nanoparticle concentrations are essential for maximizing the tribological advantages of UHMWPE-Al₂O₃ composites. Potential applications include bearing components, biomedical implants, and industrial sliding interfaces, while challenges remain in managing nanoparticle agglomeration.

Anahtar Kelimeler

UHMWPE , Tribology , Composite

Kaynakça

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