Novel Ca-Si-Ti-based sphene (CaTiSiO5) ceramics possess excellent chemical stability and cytocompatibility. The aim of this study was to prepare sphene coating on titanium alloy (Ti-6Al-4V) for orthopaedic applications using the plasma spray method. The phase composition, surface and interface microstructure, coating thickness, surface roughness and bonding strength of the plasma-sprayed sphene...

n air plasma spray process has been used to deposit tri-layer environmental barrier coatings consisting of a silicon bond coat, a mullite interiffusion barrier, and a Yb2SiO5 top coat on SiC substrates. Solidified droplets in as-deposited Yb2SiO5 and mullite layers were discovered to be epleted in silicon. This led to the formation of an Yb2SiO5 + Yb2O3 two-phase top coat and 2:1 mullite (2Al2O...

radar absorbing materials, i.e. magnetite (fe3o4) coated carbon fibers (mccfs) were fabricated by electro-deposition technique. black-colored single spinel phase fe3o4 nanoparticles was easily synthesized by hydrothermal method using reduction of a fe (iii) - triethanolamine complex in an aqueous alkaline solution at 60-80 ◦c. uniform and compact fe3o4 films were fabricated on nitric acid treat...

A novel cobalt-free Cu1.2Mn1.8O4 spinel coating is prepared and evaluated for the metal interconnect of solid oxide fuel cell. Mn-35Cu and Co-35Mn alloy coatings are deposited on 430 SS substrate and then in-situ oxidized in air at 750 ◦C for 100 h. XRD results confirm that Cu1.2Mn1.8O4 spinel with some Mn2O3 is formed, and the average thickness of the coating is 70–80 μm according to cross sec...

In this research, BaTiO3 thick deposit has been successfully sprayed by air plasma spray. The microstructure and dielectric properties of thick films were investigated by secondary electron microscopy (SEM) and LCR meter respectively. XRD measurement was carried out on plasma sprayed BaTiO3. The results illustrate differences in the crystal structure between plasma sprayed coatings and feed sto...

P. Pokorny, L. Mastny, V. Sykora, Institute of Chemical Technology Prague, Czech Republic Z. Pala, V. Brozek, Institute of Plasma Physics ASCR v.v.i. Prague, Czech Republic In the presented work, results of adhesion measurements for different systems of steel sheet-phosphate interlayerceramic coating are described. The interlayers were produced by zinc phosphating; alumina, olivine and zirconia...

The main purpose of this study was to fabricate carbon nanotubes (CNTs) reinforced zircon­nium yttrium coatings on boiler tube steel and investigate the microstructural mechanical properties these coatings. Plasma sprayed conventional ZrO2-Y2O3, ZrO2-Y2O3 1 wt.% CNT 4 were prepared deposited successfully material T-91 (ASTM SA-213) by plasma thermal spray technology. Microhardness, porosity, XR...

in this study, physical vapor deposition (pvd) ti-cr-n coatings were deposited at two different temperatures100 and 400ºc on hardened and tempered tool steel substrates. the influence of the applied deposition temperature on the physical and mechanical properties of coatings such as roughness, thickness, phase composition, hardness and young’s modulus were evaluated. phase compositions were stu...

High-reflective coatings are indispensable in order to manufacture mirrors with highest possible reflectivity. The maximum reflectivity can be achieved by all-dielectric coatings; however, the spectral bandwidth of these mirrors is limited. For astronomical applications metal based coatings (Al, Au, Ag) are commonly applied, as they allow high reflectivity and at the same time a broad spectral ...