Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/659
Title: Characteristics and high temperature wear behavior of chrome vanadium carbide composite coatings produced by thermo-reactive diffusion
Authors: Günen, Ali
Kalkandelen, Müge
Gök, Mustafa Sabri
Kanca, Erdoğan
Kurt, Bülent
Karakaş, Mustafa Serdar
Çetin, Melik
Keywords: Ductile Iron
Trd Treatment
Composite Coating
Friction
Wear
Ductile Cast-Iron
Dry Sliding Wear
Tribological Behavior
Corrosion Behavior
Growth-Behavior
Surface
Steel
Layer
Kinetics
Microstructure
Issue Date: 2020
Publisher: ELSEVIER SCIENCE SA
Abstract: In this study, Cr-V-C composite carbide layers were grown on the surface of a GGG-80 ductile iron using thermoreactive diffusion (TRD). The TRD process was carried out at temperatures of 900, 1000, and 1100 degrees C for 1 h using nano-sized Fe-V and Fe-Cr powders. The coatings were characterized by X-ray diffractometry (XRD), 2D profilometry, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), microhardness measurements, nanoindentation, and wear tests. The wear tests were performed on untreated and coated samples using a ball-on-disc type wear tester under 10 N load at four different temperatures (25 degrees C, 250 degrees C, 500 degrees C and 750 degrees C) against a 6-mm WC ball. Metallographic investigations revealed that the graphite nodules near the surface were dissolved as a result of the TRD process. Depending on the TRD process temperature, a coating with a thickness of 12-36 mu m, hardness of 24.14-31.38 GPa, and elastic modulus of 198-233 GPa was obtained. An increase in process temperature increased the thickness, hardness, and elastic modulus of the obtained Cr-V-C layers, which resulted in low friction coefficient values and decreased wear rates. Although all coated samples showed improved wear resistance in all wear test conditions, the wear rates were significantly increased at 750 degrees C due to flaking.
URI: https://doi.org/10.1016/j.surfcoat.2020.126402
https://hdl.handle.net/20.500.13091/659
ISSN: 0257-8972
1879-3347
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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