ELECTRO-CODEPOSITED Cr-SiC COMPOSITE COATINGS: EFFECT OF THE PULSE-CURRENT FREQUENCY ON MORPHOLOGY AND HARDNESS
MATERIALI IN TEHNOLOGIJE, vol.47, no.5, pp.601-604, 2013 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 47 Issue: 5
- Publication Date: 2013
- Journal Name: MATERIALI IN TEHNOLOGIJE
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.601-604
- Keywords: co-deposition technique, pulse current (PC), composite coatings, micro-hardness
- Dokuz Eylül University Affiliated: Yes
Abstract
In this research, submicrometer silicon-carbide (SiC) (APS = 200 nm) ceramic particles were co-deposited with chromium metal (Cr) via an electrodeposition system to fabricate Cr-SiC metal-matrix composite films Phase identifications of the fabricated composite coatings were performed with an X-ray diffractometer (XRD) and surface morphologies were investigated using a scanning electron microscope (SEM) with an energy dispersive X-ray spectroscopy (EDS) system attachment. Mechanical properties of the coatings such as hardness were determined under an applied load of 980.7 mN using a micro-hardness tester. It was concluded that SiC ceramic particles were physically adsorbed on the cathode surface forming a composite film structure with Cr metal and that a co-deposition of the sub-micron-sized ceramic particles with metals via an electrodeposition system was successful. In addition, in comparison with the reference coatings, the hardness of the SiC-reinforced composite coatings was increased by up to 50 %. The frequency, being a parameter of pulse current, is determined as an effective parameter in a co-deposition of ceramic particles with metals.