Study of bipolar pulsed nanocrystalline plasma electrolytic carbonitriding on nanostructure of compound layer for CP-Ti

Abstract

Surface hardening of commercially pure titanium using bipolar pulsed nanocrystalline plasma electrolytic carbonitriding has been studied in this investigation. The coating process has been performed on triethanolamine-based electrolytes using a cooling bath. The nanostructure of obtained compound layers was examined with figure analysis of SEM nanographs. The effects of process variables (i.e., frequency, temperature of electrolytes, applied voltage, and treatment time) have been studied experimentally. Statistical methods were used to achieve the optimum size of nanocrystals. Finally, the contribution percentage of the effective factors of pulsed current was revealed, and confirmation showed the validity of obtained results. It has also been revealed that by changing the size of nanocrystalline carbonitrides, other properties of the coating will change significantly.

Study of the Tribological Properties of Diffusion Coated NiTi Intermetallic on Cp Titanium

“…Despite the high specific strength and almost good corrosion resistance of titanium alloys [1,2], these materials exhibit poor wear resistance and high friction coefficient which restrict their application in items subjected to wearing conditions [3,4]. To overcome these deficiencies, several surface modification techniques like plasma nitriding, ion implantation, physical vapor deposition, liquid phase surface treatments, laser cladding, electroless, gas tungsten arc welding, and pulsed plasma electrolysis have been applied on these alloys [5][6][7][8][9][10][11][12]. The formation of diffusion coatings like nickel titanium compound (NiTi) has also drawn significant attention to combat wear [13][14][15][16].…”

Plasma electrolytic saturation of titanium and its alloys with light elements

“…For bipolar pulsed treatment with a 40% dc, four leading factors were constructed: voltage (59.35%), pulse frequency (22.43%), treatment duration (15.64%), and electrolyte temperature (2.58%) [25]. The conditions of carbonitride size minimization were optimized.…”

Comparative Tribological Study of NiTi Diffusion Coated Titanium with Pure Titanium

“…Despite the high speci c strength and almost good corrosion resistance of titanium alloys [1,2], these materials exhibit poor wear resistance and high friction coe cient which restrict their application in items subjected to wearing conditions [3,4]. To overcome these de ciencies, several surface modi cation techniques like plasma nitriding, ion implantation, physical vapor deposition, liquid phase surface treatments, laser cladding, electroless, gas tungsten arc welding, and pulsed plasma electrolysis have been applied on these alloys [5][6][7][8][9][10][11][12]. The formation of diffusion coatings like nickel titanium compound (NiTi) has also drawn signi cant attention to combat wear [13][14][15][16].…”