Hamza Mohamed S ABUSHRENTA, Sena KABAVE KILINÇARSLAN, Şeyma KORKMAZ, Onur Can ŞİRVAN, Muhammet Hüseyin ÇETİN

Jelatin ve PVA kaplı nanopartiküller ile EP yağ katkısının tribolojik performanslarının araştırılması

Bu çalışmada etilen glikol (EG) sıvısına EP ve farklı ligandlarla kaplanmış gümüş nano partikülleri (AgNP) takviye edilerek hazırlanmış yağlayıcının, CuSn10Zn kalay bronzundan imal edilmiş yatak malzemesinin tribolojik performansına etkisi araştırılmıştır. EP takviyesinin tribolojik analizi için kuru ortam, saf EG ve EG sıvısına %5, %10, %15 oranlarında EP takviye edilerek hazırlanan yağlayıcı ortamlarında aşınma deneyleri gerçekleştirilerek optimum EP oranı belirlenmiştir. Belirlenen optimum EP ile birlikte %2, %5 ve %8 oranlarında ve farklı ligandlar ile kaplanmış AgNP kullanılarak optimum AgNP konsantrasyonu ve ligand malzemesi belirlenmiştir. Optimum EP ve AgNP konsantrasyonlarının belirlendiği her iki aşamada da deneyler ball-on-plate tipi tribometre ile 20 N yük ve 40 dev/dk hız parametrelerinde gerçekleştirilmiştir. Deney sonuçları sürtünme katsayısı, aşınma hacmi değerleri ile SEM ve 3D topoğrafya görüntüleri kıyaslanarak analiz edilmiştir. Analiz sonuçlarına göre EG + %5 EP ortamında elde edilen sürtünme katsayısı ve aşınma hacmi değerlerinin %10 ve %15 konsantrasyonlarına kıyasla daha düşük olduğu belirlenmiştir. EG + %5 EP ile AgNP etkileşiminden elde edilen sonuçlara göre optimum AgNP konsantrasyonu %2, optimum ligand malzemesi de jelatin (Jel) olarak belirlenmiştir. EG + %5 EP + %2 AgNP_Jel koşullarında EG’ye kıyasla sürtünme katsayısı %18,70, hacim kaybı ise %16,94 oranında azaltılmıştır.

Anahtar Kelimeler:

Kaymalı yatak, yağ katışkısı, nano-gümüş, EP, ligandlar

Investigation of tribological performances of EP oil additive with gelatin and PVA coated nanoparticles

In this study, the effect of the lubricant prepared by adding EP and silver nanoparticles (AgNP) coated with different ligands to the ethylene glycol (EG) liquid on the tribological performance of the bearing material made of CuSn10Zn tin bronze was investigated. For the tribological analysis of EP additive, the optimum EP ratio was determined by carrying out wear tests in dry medium, pure EG and lubricant media prepared by adding 5%, 10%, 15% EP to EG liquid. Optimum AgNP concentration and ligand material were determined by using 2%, 5% and 8% AgNP coated with different ligands together with the determined optimum EP. Experiments were carried out with a ball-on-plate type tribometer at 20 N load and 40 rpm speed parameters in both stages where the optimum EP and AgNP concentrations were determined. Experiment results were analyzed by comparing friction coefficient, wear volume values with SEM and 3D topography images. According to the analysis results, it was determined that the friction coefficient and wear volume values obtained in EG + 5% EP environment were lower than 10% and 15% concentrations. According to the results obtained from the interaction of EG + 5% EP with AgNP, the optimum AgNP concentration was determined as 2%, and the optimum ligand material was determined as gelatin (Gel). In EG + 5% EP + 2% AgNP_Gel conditions, the friction coefficient was reduced by 18.70% and the volume loss by 16.94% compared to EG.

Keywords:

Sliding bearing, lubricant additive, nano-silver, EP, ligands,

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