Improvement in oxidation behaviour of steel by B₄C–TiB₂–TiC–Ni coating

Abstract

In this study, B 4 C-TiB 2 -TiC-Ni coating was thermally sprayed on the surface of 4130 steel substrate by high velocity oxyfuel (HVOF) torch. Before the HVOF process, the B 4 C-TiB 2 -TiC-Ni powder was prepared by mechanical alloying (MA). In order to study the oxidation behaviour of the coating and 4130 steel, thermogravimetric analysis (TGA) was done. The structural evolution of the samples was investigated by X-ray diffractometry (XRD). The microstructure and elemental analysis of the samples were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The coating showed higher oxidation resistance in comparison with the 4130 steel at high temperatures. It was also found that the dissolution of oxygen in the coating was the rate determining process of the coating oxidation, creating the quasi-cubic kinetic rate.

Perspectives in corrosion-performance of Ni–Cu coatings by adding Y2O3 nanoparticles

“…and wherever it is need to high corrosion resistance deposits [8][9][10]. All in all, an inclusion of the ceramic reinforcements into the electrodeposited Ni-based pure and alloy coatings may lead to enhanced tribomechanical and corrosion properties [11][12][13][14][15][16][17][18][19][20]. To date, very few attempts have been made to improve the final properties of Ni-Cu alloy coatings through incorporation of various reinforcing particles.…”

Microstructure evaluation of CO-222/SiC coating produced by the plasma spraying method

“…Various properties of the coating, like wear, corrosion and high temperature oxidation resistance, can be obtained using different coating techniques and coating materials [8,9]. Different surface techniques have been developed to produce wear resistance ceramic coatings on the carbon steel surface [10].…”

Effect of annealing process on atomic-scale structure, dislocation and mechanical behaviour of nano-grained Al–Cr–N thin films

“…For thin-film materials, oxidation problem has to be considered because heat is usually generated between the contact parts of films and workpieces. [1][2][3][4][5] Although a material has good mechanical properties, its performances may be limited due to poor oxidation resistance. [6][7][8][9][10][11][12][13][14][15] For example, diamond films have extreme mechanical properties whereas they were oxidised once the temperature exceeds 600°C.…”