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Full-Text Articles in Life Sciences
Growth Of Yba2cu3o7-Δ Thin-Films–Nucleation, Heteroepitaxy And Interfaces, M. Grant Norton, C. Barry Carter
Growth Of Yba2cu3o7-Δ Thin-Films–Nucleation, Heteroepitaxy And Interfaces, M. Grant Norton, C. Barry Carter
Scanning Microscopy
A major research effort in high-temperature oxide superconductors is the growth of high-quality thin-films. The physical properties of polycrystalline thin-films are controlled by their microstructure which is influenced by the early stages of film growth and the establishment of epitaxy. In this article, the nucleation and heteroepitactic growth of YBa2Cu3O7-δ thin-films is reviewed. Many of the examples illustrating film growth will be taken from studies using transmission electron microscopy. The importance of the substrate surface in controlling film growth will be discussed, in particular the growth of YBa2Cu3O7-δ films on …
Microscopy Analysis Of Dental Titanium Casting Investment Materials, H. J. Mueller
Microscopy Analysis Of Dental Titanium Casting Investment Materials, H. J. Mueller
Scanning Microscopy
Scanning electron microscopy (SEM) analysis and qualitative energy dispersive x-ray microanalysis (EDS) of investment materials for dental titanium casting were performed. Two commercial investment materials, Ohara and Castmatic, and an experimental zirconia material were analyzed. The microstructural constituents and the unfired and fired structures were included. Larger refractory particles and matrix embedding smaller particles were observed with each material. Detection of aluminum, silicon, magnesium, zirconium and oxygen provided a basis to reason the presence of alumina (Al2O3), silica (SiO2), magnesia (MgO), and zirconia (ZrO2). Hence, Ohara contained quartz and an alumino-silicate, Castmatic …