نتایج جستجو برای: vapor layer

تعداد نتایج: 314759  

2008
H. Wolf F. Wagner J. Kronenberg Th. Wichert R. Grill E. Belas

The diffusion of Ag in CdTe exhibits anomalous concentration profiles, which essentially reflect the profile of the deviation from stoichiometry. At a diffusion temperature of about 800 K, the Ag dopant atoms are present as charged interstitials. The deviation from stoichiometry at diffusion temperature substantially changes upon an external source of Cd atoms. Such an external source can be re...

2015
Jinyang Liu Zhigao Huang Fachun Lai Limei Lin Yangyang Xu Chuandong Zuo Weifeng Zheng Yan Qu

As is well established, mastery to precise control of the layer number, stacking order of graphene, and the size of single-crystal monolayer graphene is very important for both fundamental interest and practical applications. In this report, millimeter-sized single-crystal monolayer graphene has been synthesized to multilayer graphene on Cu by chemical vapor deposition. The relationship of the ...

2000
Yoshiko S. Hiraoka

Chemical vapor deposition (CVD) is one of the key technologies for the epitaxial crystal growth of semiconductors. In order to obtain high-performance devices, atomically controlled thin films are required. Layer by layer growth consists of various processes, i.e ., the thermal decomposition of precursors, the adsorption of growing species, their surface migration, two-dimensional nucleation, t...

2001
Z-Q. Fang J. Jasinski M. Benamara

Deep centers and dislocation densities in undoped n GaN, grown by hydride vapor phase epitaxy (HVPE), were characterized as a function of the layer thickness by deep level transient spectroscopy and transmission electron microscopy, respectively. As the layer thickness decreases, the variety and concentration of deep centers increase, in conjunction with the increase of dislocation density. Bas...

2015
Ken A. Nagamatsu Sushobhan Avasthi Girija Sahasrabudhe Gabriel Man Janam Jhaveri Alexander H. Berg Jeffrey Schwartz Antoine Kahn Sigurd Wagner James C. Sturm

Articles you may be interested in High efficiency sequentially vapor grown n-i-p CH3NH3PbI3 perovskite solar cells with undoped P3HT as p-type heterojunction layer Carrier recombination losses in inverted polymer: Fullerene solar cells with ZnO hole-blocking layer from transient photovoltage and impedance spectroscopy techniques High efficiency double heterojunction polymer photovoltaic cells u...

Journal: :International Journal of Heat and Mass Transfer 2018

Behrooz Movahedi, Iraj Lirabi Mehdi Bazargan Rasool Mokhtari Homami

In this paper, the performance of the cutting tool with nanocrystalline multilayer coatings (TiN+TiAlN) for machining of superalloy Inconel 718 in the dry and wet conditions was studied. The multi layer TiN and TiAlN with nanocrystalline structure was applied by physical vapor deposition technique (arc evaporation) on the WC-Co inserts. The results of the ball on disc wear test and the machinin...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه مواد و انرژی - پژوهشکده سرامیک 1392

thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...

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