Akımsız Ni-P-W Kompozit Kaplamalarda PTFE Konsantrasyonunun Sertlik ve Aşınma Üzerinde Etkisi

Year 2021, Issue: 28, 1356 - 1359, 30.11.2021

Serdar Aslan , Erhan Duru

https://doi.org/10.31590/ejosat.1016986

Abstract

Bu çalışmada politetrafloroetilen (PTFE) takviyeli Ni-P-W kompozit kaplamalar alkalin bir banyoda akımsız yöntemle üretilmiştir. Kompozit kaplamalar için PTFE konsantrasyonu sırası ile 5, 10 ve 20 g/L seçilmiştir. Üretilen kaplamaların yüzey mikroyapısı Taramalı Elektron Mikroskobu (SEM) ile kimyasal analizi ise X-Işınları Kırınımı (XRD) yöntemiyle yapılmıştır. Farklı PTFE konsantrasyonları ile üretilen kompozit kaplamaların ortalama mikro sertlik değerleri sırasıyla 513±22 HV, 494±17 HV ve 392±25 HV olarak ölçülmüştür. Oda sıcaklığında kuru ortamda yapılan aşınmalarda en düşük sürtünme katsayısı 0.232 µ ile PTFE konsantrasyonun 10 g/L olduğu kaplamada görülmüştür. Konsantrasyonun 20 g/L çıkarılmasıyla ortalama sürtünme katsayısında yaklaşık % 60 oranında bir artışla 0.375 µ olmuştur.

Keywords

Akımsız Kaplama, PTFE, Tungsten, Aşınma, Sertlik

Thanks

Sakarya Üniversitesi Araştırma Geliştirme Merkezine (SARGEM) bize laboratuvar imkanlarını açtığı için teşekkür ederiz.

Effect of PTFE Concentration on Microhardness and Wear Behavior in Ni-P-W-PTFE Composite Coatings by Electroless Deposition

Abstract

In this study, polytetrafluoroethylene (PTFE) reinforced Ni-P-W composite coatings were produced by electroless method in an alkaline bath. For the composite coatings, the PTFE concentration was chosen as 5, 10 and 20 g/L, respectively. The surface microstructure of the produced coatings was made by Scanning Electron Microscope (SEM) and chemical analysis was done by X-Ray Diffraction (XRD) method. The mean microhardness values of the composite coatings produced with different PTFE concentrations were measured as 513±22 HV, 494±17 HV and 392±25 HV, respectively. The lowest coefficient of friction in wear at room temperature was found to be 0.232 µ in the coating with a PTFE concentration of 10 g/L. By increasing the concentration by 20 g/L, the average friction coefficient increased by approximately 60% to 0.375 µ.

Keywords

Electroless Coating, PTFE, Tungsten, Wear, Hardness

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