Coating electron beam physical vapor deposition

C. Leyens, U. Schulz, B. A, Pint and I. G. Wright, Influence of electron beam physical vapor deposited thermal barrier coating microstmcture on thermal barrier coating system performance under cyclic oxidation conditions, Surf Coat. Tech., 120, 68-76 (1999),... 

Wolfe, D. E. and J. Singh. 2000. Titanium carbide coatings deposited by reactive ion beam-assisted, electron beam-physical vapor deposition. Surface and Coatings Technology 124 142-153. 

At an industrial applications, the TBC coverings can be produced by thermal spraying method in the air plasma spray (APS) atmosphere, at lowered pressure low pressure plasma spray (EPPS) from APS or by the electron beam physical vapor deposition method (EB-PVD), these are all dry-route processes. By these processes, coatings have different microstructures lamellar microstructure consisting... 

Figure 1.18 Thermal conductivity of various composition electron beam physical vapor deposition oxide defect-cluster coatings as a function of total dopant concentration [215].

Flgure 8.12 A cross-section of a thermal barrier coating fabricated by electron-beam physical vapor deposition (EBPVD). 

Fig. 5.1. A cross-sectional micrograph of an electron-beam physical vapor deposited yttria-stablized zirconia film which is partially delaminated from the nickel-base superalloy substrate. This ceramic layer and the interlayers comprising the bond-coat and thermally grown oxide serve as the thermal-barrier coating system in gas turbine engines, as described in Section 1.2.4. Reproduced with permission from Padture et al. (2002).

Electron-beam physical vapor deposition (EB-PVD) of rhenium on graphite has been demonstrated at The Pennsylvania State University. With EB-PVD technology, two or more materials ean be co-evaporated or deposited in layers to form functionally tailored coatings with improved properties and performance. Because rhenium is compatible not only with carbon but with platinum, palladium, ihodium, ruthenium, osmium, and iridium, it follows that EB-PVD technology can produce coatings with improved rhenium properties. For instance, deposition by electron-beam co-evaporation of rhenium with iridium will most likely provide high-temperature oxidation resistance. (Note that, presently, high-temperature, 2500 K, oxidation resistance is commercially achieved by vapor deposition of 50- to 250-pm-thick iridium films on rhenium.2... 

Xiaodong, H., Bin, M., Yue, S., Bochao, L. Mingwei, L. (2008). Electron beam physical vapor deposition of YSZ electrolyte coatings for SOFCs. Applied Surface Science. Vol. 254, pp. 7159. 

Xu Z, He, S, He L, Mu R, Huang G, Cao X. Novel thermal barrier coatings based on La2(Zro7Ceo3)2Q7/8YSZ double-ceramic-layer systems deposited by electron beam physical vapor deposition. Journal of Alloys and Compounds. 2011 509 4273-4283. 

Electron-beam physical-vapor deposited thermal barrier coatings... 

This work reports the development of a polymeric/sol-gel route for the deposition of silicon carbide and silicon oxycarbide thin films for applications such as heat-, corrosion-, and wear-resistant coatings, coatings on fibers for controlling the interaction with the matrix in ceramic matrix composites, or films in electronic and optoelectronic devices. This method, in which the pre-ceramic films are converted to a ceramic coating either by a conventional high temperature annealing or by ion irradiation, is alternative to conventional methods such as chemical or physical vapor deposition (CVD, PVD), molecular beam epitaxy, sputtering, plasma spray, or laser ablation, which are not always practical or cost efficient. 

Titanium nitride is the material of choice for the coating of high-speed steel cutting tools. It is usually applied by physical vapor deposition (reactive sputtering or evaporation by electron-beam heating). These processes are preferred over CVD since the deposition temperature is below the autenitizing temperature of the steel and the tool is not dimensionally distorted. 

Vapor deposition Physical vapor deposition techniques (eg electron beam evaporation, sputtering etc.) can be used to develop composite coatings using multiple targets in codeposition approach with intermittent reactive deposition process. 

Several physical approaches to writing patterns by STM and AFM have been reported. For AFM, these include moving nanoparticles around and arranging them in patterns by AFM tips, scratching a surface (or, more commonly, in monolayer films of atoms or molecules that coat the surface). For STM, by increasing the currents flowing from the tip of the STM, the microscope becomes a very small source for an electron beam, which can be used to write nanometer-scale patterns by probe-induced chemical vapor deposition,lithography in resists, " and surface modification. The STM tip can also push individual atoms around on a surface to build patterns. ... 

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