Reaction Synthesis of TiC-Ni Composite Coating on Copper Substrate Using Electro-Thermal Explosion Ultra-High Speed Spraying

Abstract

In this work, TiC-Ni coating was synthesized on copper substrate by electro-thermal explosion ultra-high speed spraying method at the discharge voltage of 26kV. Microstructure, phase structure, elemental distribution and microhardness of the coating were studied by means of scanning electron microscope in back-scatter-electron and secondary electron, energy-dispersive analysis X-ray spectroscopy, X-ray diffraction and Vickers hardness tester. The TiC-Ni coating, which exhibits no pores or cracks, consists of an irregular spheroidal TiC phase embedded in a nearly continuous Cu0.81Ni0.19 binder. TiC particles are uniformly distributed and the size of the TiC particle of the coating is less than 1.0 m because of the solute trapping effect. The average hardness of the TiC-Ni coating is approximately 1200 HV0.3.

Laser cladding nickel‐titanium carbide composite coating on a 45 carbon steel: Preparation, microstructure and wear behavior

“…Titanium carbide with extremely high hardness (2400 HV 3 -3000 HV 3), high melting point (3420 K), high modulus (420 GPa) and low density (4.95 g/cm 3 ) has gained increasing research atten-tion [1][2][3]. It has widely served as reinforcement for metal matrix composites or composite coatings on the metal surface for the improvement of the mechanical properties and wear resistance [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Among those metal matrix composites s or coatings, nickel based metal matrix composites loaded 49 50 with titanium carbide as reinforcement have gained extensive research interests because of their combined metallic properties (ductility and toughness) and ceramic characteristic (high strength and modulus) leading to greater strength in shear and compression and wear resistance.…”

“…[11][12][13][14][15][16][17][18][19][20]. Various coating methods such as laser deposition or laser cladding, tungsten inert gas (TIG) cladding, electrodeposition, high velocity oxy-fuel spraying (HVOF), flame spraying, electroexplosive spraying, self-propagating high-temperature synthesis (SPHTS), electro-thermal explosion ultra-high speed spraying were applied in deposition process [11][12][13][14][15][16][17][18][19][20]. Among those coating technologies, laser cladding process has been considered as an efficient and cost-effective coating technique and widely applied to fabricate metal matrix composites including nickel-titanium carbide composite coatings [23].…”