The biaxial stress and thermal expansion of multilayer doped-aluminosilicate environmental barrier coatings were measured in-situ during cooling using microfocused high-energy X-rays in transmission. Coating stresses during cooling from 1000oC were measured for as-sprayed and thermally cycled samples. In the as-sprayed state, tensile stresses as high as 75 MPa were measured in the doped-alumino...

AIM To demonstrate the design, fabrication and testing of conformable conducting biomaterials that encourage cell alignment. MATERIALS & METHODS Thin conducting composite biomaterials based on multilayer films of poly(3.4-ethylenedioxythiophene) derivatives, chitosan and gelatin were prepared in a layer-by-layer fashion. Fibroblasts were observed with fluorescence microscopy and their alignme...

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 ...

NiP/Ni composite coatings with different thicknesses were prepared on coarse-grained Ni substrates by electrodeposition. The tensile tests show that compared the substrate, toughness and strength of samples multilayer are greatly improved. uniform elongation is increased from 24% to 43%, yield 108 172 MPa. In deformation process, geometrically necessary dislocations accumulate, resulting in lon...

The CrZrN/CrZrSiN multilayer coatings at a bilayer period range decreasing from 1.35 ?m to 0.45 were synthesized on Si (100) wafer and WC-6 wt.% Co substrate using closed-field unbalanced magnetron sputter, the thickness effects mechanical properties thermal stability investigated. showed high hardness elastic modulus in ranges of 28 33 GPa 255 265 GPa, respectively, friction coefficient lowest...

The paper presents the results of theoretical and experimental research tribotechnical characteristics (tool wear on back surface, tool durability period, critical cutting path length before blunting) innovative nanostructured multilayer composite coatings for milling heat-resistant alloys aerospace parts.