gummfd Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi 1300-1884 1304-4915 Gazi Üniversitesi 10.17341/gazimmfd.1132419 Engineering Mühendislik Investigation of tribological performances of EP oil additive with gelatin and PVA coated nanoparticles Jelatin ve PVA kaplı nanopartiküller ile EP yağ katkısının tribolojik performanslarının araştırılması https://orcid.org/0000-0002-7068-268X Abushrenta Hamza Mohamed S KARABÜK ÜNİVERSİTESİ https://orcid.org/0000-0001-7302-4554 Kabave Kılınçarslan Sena KARABÜK ÜNİVERSİTESİ https://orcid.org/0000-0002-6871-980X Korkmaz Şeyma KIRŞEHİR AHİ EVRAN ÜNİVERSİTESİ https://orcid.org/0000-0001-5801-4294 Şirvan Onur Can KONYA TEKNİK ÜNİVERSİTESİ https://orcid.org/0000-0003-0429-5507 Çetin Muhammet Hüseyin KONYA TEKNİK ÜNİVERSİTESİ 04 12 2023 38 4 2213 2230 06 17 2022 10 13 2022 Copyright © 1986, Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi 1986 Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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.

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.

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