Papers by Keyword: Coating Process

Abstract: High-velocity oxy-fuel spraying is a widely used thermal spray technology for producing dense and wear-resistant coatings. The thermal input during spraying strongly influences coating microstructure, residual stress state, and substrate integrity. In this work, in situ thermal measurements were performed on S235 substrates during High-velocity oxy-fuel deposition of 316L coatings. Two spraying strategies were compared: (i) single-pass rotation and (ii) multi-pass rotation. Thermocouples embedded at 1.8mm depth captured transient temperature responses, revealing significant thermal cycling effects. Single-pass operations produced no significant heating–cooling cycles, while multi-pass strategies led to thermal accumulation and overlapping cycles. The results provide reference data for the calibration of finite element heat source models and support the development of process–structure–property relationships in High-velocity oxy-fuel coatings.

Abstract: A modification cutting tool is a type of cutting tool that can be altered or adjusted to change its cutting properties. This can include changing the angle or shape of the cutting edge, adjusting the depth of cut, or modifying the material or coating used on the tool. These modifications allow for greater precision and efficiency in cutting operations, particularly in industries for manufacturing and construction different products. Ceramic materials can be used in coatings to provide a variety of benefits, such as corrosion, wear resistance , and thermal insulation. They also offer high hardness, low friction, and chemical stability. Ceramic coatings can be applied to various substrates including metals and ceramic. Modification of cutting tools using nanomaterial deposition is a promising approach to enhance their performance and durability. The process involves depositing one or more layer of nanosized particles onto the surface of the cutting tool, which can improve its mechanical, thermal, and tribological properties. Keywords: Ceramic materials ; coating ;cutting tools; coating process.

Abstract: With the rise of electromagnetic radiation-based technologies, considerable attention has been drawn to developing and implementing innovative electromagnetic shielding materials. Carbon nanomaterials and conductive polymers have been appealing to both academia and industry as promising alternatives for the traditionally used metallic materials, owing to their lightness, flexibility, easy processability and resistance to corrosion, which are of special importance for textile applications. In this work, multiwalled carbon nanotubes (MWCNTs) and poly (3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) have been applied to cotton textile substrates by straightforward scalable dyeing and coating processes, respectively. These processes led to uniform and homogeneous coatings with distinct properties: the fabric coated with MWCNT presented higher thickness and lower loading of incorporated material than the textile coated with PEDOT:PSS (thickness: 995 μm vs. 208 μm; material loading: 9.4 wt.% vs. 70.7 wt.%). The electromagnetic shielding properties were outlined for each shielding textile in the frequency range of 5.85–18 GHz: an average shielding effectiveness of ~35.6 dB was obtained for MWCNT@tex, while PEDOT:PSS@tex reached ~38.3 dB. Thus, PEDOT:PSS provided enhanced radiation shielding with lower coating thickness, while the MWCNTs led to improved attenuation with less material usage. Shielding effectiveness values above 30 dB were obtained for both electromagnetic interference shielding textiles, which corresponds to an excellent classification for general use applications, such as casual clothing and maternity wear.

Abstract: Titanium carbonitride (TiCN) thin films with differing C content were deposited by cathodic arc evaporation of pure Ti in a gas composite environment of N₂ and C₂H₂. Scanning electron microscopy (SEM), scratch test, mechanical profilometer and “ball-on-disc” tribometer methods were used to characterize the surface, the coefficient of friction (CoF) of the TiCN thin films and the evaluated wear. An increase of the C₂H₂ fraction in the gas environment leads to a continuous increase in the deposition rate of the TiCN thin films, as well as an increase in the adhesion of the films to the substrate and the values of the CoF. Tribological test results (when tested against Si₃N₄ balls) show an increase in the friction coefficient of the TiCN from 0.08 to 0.32, with increasing carbon concentration in the film. The CoF decreases rapidly to 0.06 at a C content of 20.6 at.%, N 38.4 at.% and Ti 41.0 at.%.

Abstract: Adjusting the proportion of gases and stirring rate and other parameters, the value of pH, electrical conductivity, electrode potential, temperature of the system were tested online under different parameters. According to the results of scanning electron microscopy , the coating effect of different reaction stages and the influence of different coating processes were analyzed.

Abstract: The modified mullite fiber was used to toughen the mullite ceramic, which can effectively overcome the brittleness of ceramic materials and improve the material strength and toughness. Using 8ZrOCl₂•H₂O as precursor, anhydrous ethanol as solvent, H₂O₂ as hydrolysis promoter and NH₃·H₂O as precipitant, the stable and transparent zirconium sol could be obtained by sol-gel process, which coated mullite short fiber. The results showed that the stable and transparent ZrO₂ sol was obtained when pH value was 3.8~4.8 and reaction temperature was at 25°C. XRD results indicated that monoclinic ZrO₂ particles grew up and formed after heat-treatment at 700°C. The coating ZrO₂ film combined with mullite fiber homogeneously and closely, and the film thickness was about 1 μm.

Abstract: Li-ion power battery has many advantages, such as high energy, lightweight, long cycle life and so on. It has become a research hotspot in the new energy field. This paper describes the Li-ion power battery coating and drying process which has a significant effect on the performance of Li-ion power battery. According to the market research and business requirements, the project decides to apply heated-wind circulating and shock drying method to dry of the Li-ion power battery electrode. The method has been successfully applied to the production, which has achieved excellent results in energy saving and improving enterprise efficiency.

Abstract: This study examined the effect of the coating speed, coating solution, cure temperature, knife gap and fabric matrixes on surface properties, water vapor permeability and hydrostatic head test. The optimum conditions for surface high water vapour permeability that enables the user to “dial in” the right balance of properties based on the findings of the experimental. This sample showed high excellent resistance to +7m in hydrostatic head tests for a single-layer coated fabric and. Surface morphology showed that the coating was continuous without cracks or pin holes and appeared to be well adhered to the substrate even after a harsh wash.

Abstract: In this work, polyurethane coating on the fabrics is studied in the Basecoater 200. The structure and morphology of coated fabrics were investigated using SEM and soaking test in the cured coated samples. Coating thicknesses, surface friction coefficient and surface roughness variation of the samples were measured using the surface tester of the KESF. Results showed that uniform and cross linking degree of the surface layer of coated samples have close relevant with coat processing. The performance quality of end products can be achieved by optimization of process variables, including coating speed, coating solution, and cure temperature and fabric matrixes during fabric coating processing.

Abstract: The paper reviews the advantages of diffusion coating and the parameters deciding an optimum coating performance. Furthermore, innovative coating approaches are presented which have a significant potential beyond existing diffusion coating solutions.