Rapid and controllable sliding of droplets on anisotropic superhydrophobic surface has significant meaning in advanced science and technologies, thus being widely studied in recent years. Herewith, we reported a fabrication of micro- and nano- fractal superhydrophobic surface patterned with micro hydrophilic channels using laser direct writing method. The sliding angle of droplets in the direction

The retention and fragmentation of the polycrystalline ceramic particles have a significant influence on the properties of the cold sprayed coatings. In this computational study, polycrystalline ceramic models were developed which demonstrated that ceramic fragmentation and retention were influenced by particle grain sizes and their impact velocities. The underlying mechanisms of crack initiation and

Cu-SiO2 core-shell nanoparticles (NPs) were added to the polytetrafluoroethylene (PTFE) top layer of polydopamine (PDA)/PTFE thin coatings to improve the durability of the coatings. Three very low weight percentages of Cu-SiO2 NPs (0.005 wt%, 0.0075 wt%, 0.01 wt%) were added to a PTFE dispersion, which was then used to dip-coat the PTFE + Cu-SiO2 NPs onto PDA-coated stainless steel substrates to form

Various methods have been employed to extract the elastoplastic properties of coating materials. In this work, the Levenberg-Marquardt optimization algorithm is integrated with the finite element (FE) analysis, and different hardening models are utilized to characterize the elastic plastic mechanical properties of the coating materials. Based on load-displacement curves obtained from different models

In this work, a comparative study was conducted on the tensile behaviors of two representative accident-tolerant cladding coatings, i.e., CrN coating and Cr coating, at both room temperature and 400 °C by in situ tensile testing. The surface and interfacial cracking behaviors of the coatings were experimentally tested and analyzed, with the surface crack densities predicted by a modified shear-lag

The CC@TiO2-Cu membranes with various Cu doping contents have been synthesized via a simple one-step hydrothermal method for oil-water separation application. It is found that a certain amount of Cu doping is beneficial for achieving visible light response and enhance the superhydrophilicity/underwater superoleophobic performance of CC@TiO2-Cu membranes. Importantly, the CC@TiO2-Cu2.5 membrane with

A comparison is made between the self-organized surface features that form on copper using femtosecond versus picosecond laser pulses. Modification of material surfaces (like metals and dielectrics) have shown to affect the properties for applications including enhancing heat transfer and producing anti-corrosive or antibacterial surfaces. Femtosecond laser surface processing is a precise and repeatable

Although aluminum alloys are widely used in the aerospace industry, their relatively poor wear and corrosion resistance have hampered some applications and reduce the lifetime of the components. In this work, by using a zinc-containing phosphate electrolyte, the corrosion resistance, surface hardness, and wear resistance of the coatings produced by plasma electrolytic oxidation (PEO) are simultaneously

In this work, the influences of the magnetic field configuration (mirror-field and closed-field) on plasma parameters and ion flux dynamics of dual magnetron reactive high power impulse magnetron sputtering (R-HiPIMS) with Al targets in Ar/O2 mixture were studied by time-resolved Langmuir probe and time-averaged mass spectrometer. Compared with mirror-field configuration, the electron density (ne)

Coatings of Ni-B have gained significant importance in various industries owing to their major role in improving mechanical properties including hardness, conductivity, and wear resistance. Despite all these characteristic features, there is still the need for a lot of modifications. This is to improve the properties of the coating so as to increase their durability and overall performance. The current

It is well understood that the components with holes used in aviation and aerospace industries are generally vulnerable to alternate cycles of working stress during their service, which are weakest parts and highly prone to failure and fracture due to the stress concentration at the edge of hole. To improve the resistance towards fatigue failure of the hole, laser shock peening (LSP) technology is

In this research, a series of biocompatible coatings are applied to nickel-free austenitic stainless steel via the electrophoretic method. Hydroxyapatite (nHA) and titania (nTiO2) nanoparticles are utilized as primary materials, while polycaprolactone (PCL) is employed as a binder for production of the electrolyte suspensions. Optimum concentration of binder is achieved and suspensions with different

The ZrB2-ZrC composite coating fabricated by ZrB2-ZrC powder shows low density and poor properties. To improve the quality of ZrB2-ZrC composite coating, Zr-B4C powder was used as precursor and the ZrB2-ZrC composite coating was successfully synthesized in situ on the surface of titanium alloy. The microstructure evolution and reaction mechanism of the Zr-B4C composite powder in plasma spraying process

Ni feedstock particles were sprayed onto a grit-blasted stainless-steel substrate using the high-velocity oxy-fuel (HVOF) deposition process to analyse the flattening behaviour and bonding features of single splats on a roughly textured substrate surface. Both substrate surface features and splat morphologies were analysed through scanning electron microscopy (SEM), while cross-sectional features,

The study concentrates on systematic investigations on the effects of extremely high or low carbon concentration (2%–14%) and gas pressure (800 Pa–3200 Pa) on crystal structures, grain sizes, phase compositions, surface and cross-sectional morphologies, growth rates, surface roughness, mechanical and tribological performances of various polycrystalline diamond films synthesized on cemented carbide

The growth of cases of nosocomial infections is an urgent issue in health care facilities. Reducing cross-contamination from high-frequency touch surfaces is a key area of interest. Robust TiO2 coatings on touch surfaces could reduce pathogen viability if the material could be modified to increase photocatalytic activity (PCA) under visible light. Research has focused on increasing the bandgap by use

Type III deep eutectic solvents (DES) have been extensively studied as a green electrodeposition solvent due to their wide potential window and degradability. The preparation of nickel-based coatings from DES commonly uses nickel chloride as the main precursor of Ni2+, but it generates harmful chlorides during long-term electrodeposition. This article uses nickel sulfate as the main precursor of Ni2+

The Ba(Mg1/3Ta2/3)O3 (BMT) ceramic is considered a potential candidate material for thermal barrier coating (TBC) applications, due to its excellent thermophysical properties. However, the low fracture toughness and poor chemical compatibility with thermally grown oxides result in an inferior thermal shock performance of single-layer BMT coatings and greatly limit its application. In this study, BMT-yttria

Titanium alloy is playing an increasingly important role in the field of biomedicine. However, poor wear resistance of titanium alloy will cause premature failure, which greatly limits its scope. Therefore, this study used a self-made induction nitriding device to nitride medical pure titanium (TA1), then the nitriding layer produced was characterized by XRD, SEM and nanoindentation instrument, and

Hot corrosion and oxidation cause very destructive damage in thermal barrier coatings (TBCs) during service conditions. In hot corrosion, TBCs exposed to molten salts lose their integrity easily due to the phase transformations while oxygen easily penetrates from the TBCs to bond coats and forms thermally grown oxide (TGO) layer which causes higher stresses at the interface of bond and top coating

Thermal stability of reactive magnetron sputtering deposited oxygen vacancy stabilized cubic zirconia (OVSZ) thin films containing 16 and 3 at.% oxygen vacancies is reported. Temperature-resolved grazing incidence X-ray diffraction (TR-GIXRD) measurements (200-900 °C) in air and nitrogen atmosphere were performed. TR-GIXRD data show that the deposited films are stable up to 750 °C irrespective of the

A study of the surface hardening process of the 42CrMo4 steel alloy by means of an oscillating laser beam has been carried out. For this purpose, a fiber coupled high power diode laser source and a galvanometric mirror scanner have been used. The study is focused on determining the influence of the oscillation frequency parameter on the temperature, geometry, microstructure, microhardness and stress

Low pressure cold spray (LP-CS) is a kind of cold spray (CS) technology. Due to lower gas pressure, particles are difficult to deposit using LP-CS. The particles should be softened by heating of the carrier gas (200°C~600°C) in the Laval nozzle to compensate for this deficiency. In this study, the morphology of particles ejected from the Laval nozzle was observed using a scanning electron microscope

Thermal properties of the magnetron discharge with uncooled copper and chromium targets were studied experimentally and theoretically for DC and long HiPIMS (L-HiPIMS) operation modes. A set of thermal fluxes was considered to build a numerical model of the hot target exposed to DC and high-power pulsed plasma. The modeling results were tested in the experiments. The temperature of targets was measured

Critical micelle concentration (CMC) is an important factor to avoid the formation of micelles from monomeric surfactant molecules. Trisodium citrate stabilized electroless Ni-B (ENi-B) coating on aluminium alloy (Al7075-T6) is attempted with the addition of amphoteric surfactant, 3-(N, N-Dimethylmyristylammonio) propanesulfonate (3-DMAPS), to enhance the surface finish (Ra) of the coatings. The main

The relatively weak interfacial bond and brittleness of cold sprayed deposits limit their industrial applications for the fabrication of complex structural components. In this study, pure copper, as a typical material for cold spray additive manufacturing (CSAM), was deposited and then post-processed with conventional heat treatment (HT) and newly developed electric pulse processing (EPP) and friction

In this paper, the micro arc oxidation (MAO) method was utilized to prepare the ceramic coatings on Mg-5Y-7Gd-1Nd-0.5Zr substrate. Effects of different reaction time and NH4VO3 concentration on the morphology, composition, absorptance, emissivity, corrosion resistance and adhesion strength of coatings were investigated. These results show that the as-prepared coatings were mainly composed of Mg, Si

Low-temperature plasma nitriding has been widely studied and applied, in enhancing the wear performance of austenitic stainless steels (ASSs) without losing corrosion resistance. In this work the wear and corrosion behaviours of two specialty ASSs, i.e. Staballoy® AG17 (Fe-17Cr-20Mn-0.5N, in wt.%) and RA330® (Fe-19Cr-35Ni-1.2Si, in wt.%), were evaluated – and compared to AISI 304 – before and after

In the present work, a Zn-Al layered double hydroxide (LDH) conversion coating was synthesized on 2024-T3 aluminum alloy by a one-step hydrothermal method. For this purpose, the effect of synthesis parameters, including the amount of Zn2+ cations and hexamethylenetetramine molecules, on the structural changes were evaluated by using the scanning electron microscopy (SEM) equipped with energy dispersive

A novel method that taking electrodeposited copper foil as a raw material undergoes asynchronous rolling and surface morphology modification at room temperature was proposed, and the rolled electrodeposited (RE) copper foil with excellent mechanical properties and modified surface morphology was obtained to be used as the anode current collector of high-performance lithium-ion batteries. The surface

The aim of this paper is to investigate the effect of laser re-melting on the morphology and mechanical properties of cladding layer under different laser power conditions. In this study, the laser re-melting tests were performed on YCF102 cladding layer with different laser power, and the morphology and microstructure of each cladding layer were researched by optical microscopy. Meanwhile, the microhardness

The local microstructural heterogeneities in a single layer of laser clad hypereutectic Al-50Si alloy over Al7075 substrate has been studied over different applied laser powers. The general microstructure of the laser clad layer, irrespective of the applied laser power, could be described by three distinctive regions from the deposited bead/substrate interface to the top – i) columnar primary Al-dendritic

In this paper, SiO2-TiO2 composite particles were prepared by loading nano-TiO2 onto the surfaces of amorphous SiO2 microspheres, which were then modified with PDMS to obtain a SiO2-TiO2@PDMS ternary compound. The photocatalytic performance of SiO2-TiO2@PDMS and the wettability of the coated surface were tested and characterized. Moreover, the effect of microstructure and composition of SiO2-TiO2@PDMS

NiCoCrAlYTa/TaC metal matrix composite coatings were prepared on single crystal superalloy (SX) using electrospark deposition (ESD) to improve its high temperature performance. The effect of TaC addition on the coating microstructure, oxidation behavior, wear resistance and physical properties of electrode were investigated. The results showed that, with the addition of TaC particles, the density of

Micro-arc oxidation (MAO) is a powerful tool to modify the surface of Ti alloys, in order to increase the lifetime of orthopedic implants. It is well established that the resulting oxide films are dependent on the parameters used during anodic treatment, however the influence of the substrate (bulk properties) is still a subject lacking for better understanding. This paper aims at studying the effect

TiN film has been used in the surface modification of orthopaedic implants due to its favorable biocompatibility and tribological properties. Copper ions have low toxicity and biological functions. In this study, copper was doped to TiN film to enhance the viability of osteoblast and decrease the inflammatory response of macrophages for TiCuN film applications in orthopaedic implants. TiCuN films with

In order to search for new compositions and structures of wear-resistant and protective coatings, the study of multi-element gradient-layered coatings (Ti, Al, Si, Cr, Mo, S) O, N has been carried out. Using the methods of scanning, transmission electron microscopy, X-ray photoelectron spectroscopy, indentation, scratching and tribotesting, the composition, structure, and mechano-tribological properties

High performance Fe-based amorphous coatings were first fabricated on 304 stainless steel by resistance seam welding. The microstructure, microhardness, wear and corrosion resistance of the coatings under different welding current were systematically studied. The coatings consisted of amorphous phase and crystalline phases of M23C6, Fe3C and α-Fe. Moreover, coating formation mechanism was characterized

Bulk metallic glasses (BMGs) with amorphous structure have excellent mechanical and chemical properties. In polishing process, it is hard but important to maintain amorphous state to keep original properties of BMGs, which are easily crystallized in traditional mechanical polishing and long-pulse laser polishing. In this paper, we first propose to use femtosecond laser double-pulse irradiation to smooth

Ti3AlC2 reinforced Co–based alloy coatings were fabricated on H13 steel using a laser cladding (LC). The morphologies, chemical elements and phases of obtained coatings was analyzed using a scanning electron microscope (SEM), energy dispersive spectroscope (EDS), and X–ray diffraction (XRD), respectively. The effects of Ti3AlC2 mass fraction on the microstructure and friction–wear performances at 600 °C

Ni was deposited on sintered NdFeB magnets by pulse current (PC) electro-deposition. And a better corrosion resistance of the deposits was observed. Growth direction of the Ni particles was changed to be in two dimensions, which provided the minimal defects and smooth interface, the smooth and pyknotic Ni deposits were observed. The texture of the Ni deposits by PC showed a preferred orientation along

This work has been initiated with the aim of increasing the success of micro-arc oxidation coatings fabricated on aluminium alloys against degradation under sliding contact conditions at high temperatures. For this purpose, the 7075 Al alloy has been micro-arc oxidised in an aluminate-based electrolyte with or without the adding monoclinic ZrO2 particles. Microstructural analyses revealed that the

TiNi shape memory alloy exhibits an excellent cavitation erosion resistance. Therefore, it’s an effective method for preventing cavitation erosion by applying this material as a coating. In this paper, the effect of Co element addition on cavitation erosion resistance of TiNi based coating deposited by atmospheric plasma spraying (APS) was investigated. The microstructure and microhardness were characterized

In this work, we fabricated first-ever nanohybrids ZnO nanowires (ZnO-NWs)/Metallic Nanotube Arrays (MeNTA) structure for the large-scale fabrication of highly dense laterally and vertical aligned ZnO-NWs. To prepare heterogeneous surface MeNTA by using sputter-deposition of different metallic glasses (Zr55Cu30Al10Ni5, Cu47Zr42Al7Ti4, Pd72Cu12Si16, W50Ni25B25 and Ni54B0.3Si36Cr2.7Fe7) over on contact-hole