Laser Cladding In-Situ Ti(C,N) Particles Reinforced Ni-Based Composite Coatings Modified with CeO2 Nanoparticles

Abstract

Abstract:To improve the wear resistance of titanium alloy parts used in the engineering applications, in-situ formed Ti(C,N) particles reinforcing Ni-based composite coatings are fabricated on Ti6Al4V alloys by the laser cladding technique using Ni60, C, TiN, and small amounts of CeO 2 nanoparticles mixed powders as the pre-placed materials. Firstly, the formation mechanism of Ti(C,N) particles as a reinforced phase in the coating is investigated. Then, the influences of CeO 2 nanoparticles on microstructures and wear resistance of the coatings are analyzed. It is indicated that the large Ti(C,N) particles form around TiN particles, and the small Ti(C,N) particles form through independent nucleation. CeO 2 nanoparticles play important roles in increasing the nucleation rate and improving the precipitation of Ti(C,N), hence the microstructures and wear resistance of the coatings are apparently improved after adding CeO 2 nanoparticles. It is observed that the 1 wt % content of CeO 2 additive in the pre-placed powders is the best choice for the wear resistance of the coatings.

Surface Treatment Technology of Metals and Alloys

“…Technology of Metals and Alloys. All the presented subjects are multidisciplinary, and include shot peening treatment [1], electropolishing [2], low-pressure carburizing [3], oxi-nitrocarburization [4], abrasive blasting [5], hydrothermal treatments [6], laser cladding [7], plasma modification [8], low-temperature vacuum carburization [9], plasma electrolytic oxidation [10], and thermoreactive deposition [11].…”

“…The improving of the wear resistance of titanium alloy Ti6Al4V may be obtained by the laser cladding technique using Ni60, C, TiN, and CeO 2 nanoparticles mixed powders as the pre-placed materials. It was noted that the CeO 2 nanoparticles influence the wear properties of the coatings, i.e., they have higher hardness, lower wear loss, and better wear morphology compared to the coating without CeO 2 [7].…”

Effect of CeO2 addition on microstructure and tribological characteristics of laser cladded Cu10Al–MoS2 coating under oil lubrication

“…[10][11][12] The addition of rare earth oxides has many advantages such as purification, modification, and alloying, which can improve the metallurgical bonding and mechanical properties (toughness and low temperature brittleness) of metal materials. [13][14][15][16] When the rare earth oxides are added to the alloy coating, the grain size of coating is effectively refined, and its microstructure and tribological properties can be improved. [17][18][19] In recent years, many researchers have successfully prepared rare earth modified coatings by flame spraying, LC, electrodeposition, and so on.…”

Wear behavior of electrodeposited nickel coating on ZP5 zinc alloy

“…Many studies on the wear behavior of metal coatings were run 15–18 ; however, few of them concern electroless nickel coatings, 19–28 and, to the best of the authors’ knowledge, none of them is focused on the wear behavior of electrodeposited nickel coating. 29 Therefore, the aim of this work is to determine the wear behavior of electrodeposited nickel coating on ZP5 zinc alloy, by assessing the influence of coating thickness and applied load.…”