Nurcan ÇALIŞ AÇIKBAŞ, Gökhan AÇIKBAŞ, Bilge YAMAN

Porselen Atık Takviyeli Epoksi Kompozitlerinin Tribolojik Özelliklerine Vakum Uygulamasının Etkisi

Bu çalışma, vakum uygulamasının atık porselen katkılı epoksi matrisli kompozit malzemelerin mekanik ve tribolojik özelliklerine etkisini değerlendirmektedir. Tribolojik karakterizasyon; tungsten karbür aşındırıcı bilye kullanılarak oda sıcaklığında yağlayıcı olmadan bilye-disk (ball-on-disk) konfigürasyonunda triboloji testleri gerçekleştirilerek sürtünme, aşınma oranları ve aşınma davranışları belirlenmiştir. Vakum uygulamasının; aşınma mekanizmaları, aşınma yüzeylerinde tribo-kimyasal tabaka oluşumu, sürtünme özellikleri ve tribolojik performans üzerindeki rolü araştırılmıştır. Mikroyapı, mekanik ve fiziksel özellikler ile aşınma davranışı ilişkisi ayrıntılı incelenmiştir. Vakum uygulaması partiküllerin daha iyi ıslatılmasına, matris ve partikül arasında daha kuvvetli bağ mukavemeti oluşmasına sebebiyet vermiştir. Vakum uygulamasıyla üretilmiş kompozitler, vakumsuz üretilmiş kompozitlere göre daha düşük sürtünme katsayısı ve daha düzgün tribokimyasal tabakanın oluşmasına sebebiyet vererek daha iyi aşınma dayanımı sergilemişlerdir.

INFLUENCE OF VACUUM APPLICATION ON THE TRIBOLOGICAL PROPERTIES OF PORCELAIN WASTE REINFORCED EPOXY COMPOSITES

This study evaluates the effect of employment of vacuum application on the mechanical and tribological properties of porcelain waste added epoxy matrix composites. Tribological characterization was determined by friction, wear rate and mechanisms using ball-on-disk test by tungsten carbide counter-part without lubrication at room temperature. It is investigated the role of vacuum application on the wear mechanisms, tribo-chemical layer formation on the wear surfaces, frictional property and tribological performance. The microstructure, mechanical and physical properties and wear behavior correlation were discussed comprehensively. Vacuum application provided fully embedded and well wetted particles, and strong bonding strength between matrix and filler. It is demonstrated that well bonded particle reinforced composites have higher wear resistance, by resulting lower friction coefficient, and more smoother tribochemical layer than compared with the unvacuumed composites.

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