In the present research, to form niobium carbide coating on the surface of AISI L2 steel Thermo-Reactive Deposition method (TRD) in a molten bath was used. Niobium carbide coating treatment was carried out at 1173 K, 1273 K, and 1373 K for 2, 4, and 8 hours. The molten bath contained 20wt.% borax (Na2B4O7), 5 wt.% boric acid (B2O3), and 75 wt.% ferro-niobium. The presence and properties of...

The surface profile of the film formed by spin coating is experimentally investigated in this paper. unavoidable wavy form at was observed when ultraviolet curable resin used. In addition, thickness variation directly related to viscosity, disk rotation speed, and size. Fluid dynamic theory with non-dimensional analysis conducted describe after process. It found that had been thickened until vi...

The moisture sorption behaviour of three coating thicknesses of shellac and polyurethane films on Dalbergia sissoo substrate is studied in this paper. The thin films of either coat failed to reduce the water vapour transmission significantly. However, the thick coats were able to reduce this rate illustrating the importance film thickness of coating used on surfaces of wood products. The increm...

This paper presents the coating thickness effect on the stress distribution of a coated cylinder head. A typical thermal barrier coating was applied on a diesel engine cylinder head. Thus, the residual stress which occurred during the plasma thermal spraying was also considered. The coating system consisted of two layers a metallic bond coat and a ceramic top coat. The bond coat thickness is co...

The primary role of antifouling precautions on ship hulls is to avoid the tremendous increase in drag resistance caused by the settlement of fouling species. In this chapter, basic hydrodynamic concepts needed to fully understand the effect of fouling species on the propulsion requirements of a ship will be introduced. Subsequently, studies on the drag resistance associated with various coating...

Hollow spherical particles of rutile were obtained by coating colloidal polystyrene beads with a titanium oxide hydrate layer and subsequently calcining at elevated temperatures under an oxygen atmosphere. In order to investigate the optimum conditions for the preparation of these hollow beads the maximum temperature and heating rate were systematically varied. The dimensions of the voids and t...

Metallic coatings are primarily designed to enhance properties have been ascertained via indentation, this method can also serve as a non-destructive quality surface properties such as corrosion resistance, thermal protection, and tribological behaviour of a particular control test during production. In the present work experimental and computational studies of microand component in service. Ho...

Spherical indentation of a thin, hard coating bonded to a thick substrate is investigated. The bending of the coating over the softer substrate induces concentrated tensile stresses on the lower and upper coating surfaces, from which transverse cracks may ensue. This work is primarily concerned with ring cracks originating from the top surface of the coating. In-situ indentation tests are carri...

Brush-electroplated nickel coating has been widely applied to repair and remanufacture ferrous metal component. Generally, the nickel coating has thickness from 0.05 mm to 0.2 mm, and it is also ferromagnetic like iorn metals. Therefore, the traditional supersonic thickness tester and eddy current thickness tester are not competent to measure the nickel coating thickness on iron or steel metal ...

As an important quality index of high voltage electricity transmission tower, zinc coating thickness detection and quality control is more and more attention in recent years. The coating thickness and uniformity of tower materials provided by the suppliers are tested through the traditional method by the power department, the detection precision of this method is low efficiency and analysis res...