The Experts below are selected from a list of 157941 Experts worldwide ranked by ideXlab platform
Shigemitsu Maruno - One of the best experts on this subject based on the ideXlab platform.
-
Surface Deformation and electrical properties of HfN thin films deposited by reactive sputtering
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1995Co-Authors: R. Nowak, Shigemitsu MarunoAbstract:The electrical and mechanical properties of HfN films deposited on silicon by a reactive r.f. sputtering method are examined and discussed in terms of the films' structure and deposition conditions. The structural information has been obtained by employing a thin film X-ray diffraction method, Auger electron spectroscopy and electron microscopy. The recently developed energy principle of indentation has been applied in discussing the results of thin films' indentation by means of a depth-sensing technique. The theory allows the assessment of the details of Surface Deformation of nitrides, including the delamination process. The electrical properties of the studied films (i.e. resistivity and Hall coefficient) and their structure are found to be related to the deposition conditions. Moreover, the variation of the resistivity (electrical properties) appears to be accompanied by differences in the residual stress level as measured by the deflection method, and by differences in the mechanism of Surface Deformation (mechanical properties) of the HfN films.
Jun Hu - One of the best experts on this subject based on the ideXlab platform.
-
monitoring Surface Deformation over permafrost with an improved sbas insar algorithm with emphasis on climatic factors modeling
Remote Sensing of Environment, 2016Co-Authors: Rong Zhao, Zhiwei Li, Guangcai Feng, Qijie Wang, Jun HuAbstract:Abstract Changes of permafrost not only affect regional and global water circulation, carbon deposit and climate warming, but also influence ground ecological, geophysical, and biogeochemical processes in cold region. Monitoring Surface Deformation over permafrost will help to understand the dynamics of these processes, assess climate changes, and prevent potential damages to engineering structures underlain by permafrost. This article employs an improved small baseline subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique to monitor the Surface Deformation over the Danxiong-Yangbajing area in the southern Qinghai-Tibet Plateau (QTP), with emphasis on climatic factors modeling. A new Deformation model considering both the external (mainly climatic) and internal factors (such as tectonic activities and thermal character of frozen soil) is constructed and introduced into the SBAS-InSAR to estimate the Surface Deformation over permafrost. The results show that the peak-to-peak annual Deformation over natural Surface is 3.6–5.0 cm, while that along the Qinghai-Tibet Highway (QTH) and the Qinghai-Tibet Railway (QTR) is 2.8–3.7 cm. We also find that the Surface Deformation over frozen soil is negatively correlated to air temperature and precipitation, with the correlation being − 0.80 to − 0.45 and − 0.95 to − 0.75, respectively. The root mean squares (RMSs) of the residual (un-modeled) Deformation got by the proposed method are much smaller than that by the existing methods. We also successfully examine a time lag of about 60 days between the retrieved maximal subsidence and the highest air temperature in warm seasons (from May to September). After compensating for this time lag, the RMSs of the residual Deformation reduce significantly and the correlation between the Deformation and the temperature rises considerably, varying from − 0.95 to − 0.65. The method presented in this paper is more suitable to model and analyze the Surface Deformation in permafrost areas.
R. Nowak - One of the best experts on this subject based on the ideXlab platform.
-
Surface Deformation and electrical properties of HfN thin films deposited by reactive sputtering
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1995Co-Authors: R. Nowak, Shigemitsu MarunoAbstract:The electrical and mechanical properties of HfN films deposited on silicon by a reactive r.f. sputtering method are examined and discussed in terms of the films' structure and deposition conditions. The structural information has been obtained by employing a thin film X-ray diffraction method, Auger electron spectroscopy and electron microscopy. The recently developed energy principle of indentation has been applied in discussing the results of thin films' indentation by means of a depth-sensing technique. The theory allows the assessment of the details of Surface Deformation of nitrides, including the delamination process. The electrical properties of the studied films (i.e. resistivity and Hall coefficient) and their structure are found to be related to the deposition conditions. Moreover, the variation of the resistivity (electrical properties) appears to be accompanied by differences in the residual stress level as measured by the deflection method, and by differences in the mechanism of Surface Deformation (mechanical properties) of the HfN films.
Qi Kang - One of the best experts on this subject based on the ideXlab platform.
-
Experimental study of Surface Deformation and flow pattern on buoyant-thermocapillary convection
Microgravity - Science and Technology, 2004Co-Authors: Qi Kang, Li DuanAbstract:Free Surface Deformation is one of the most important physical phenomena in fluids with free Surface. In the present paper, convection and Surface Deformation caused by thermocapillary effect in a rectangular cavity were investigated. In ground experiments, the convection was also affected by gravity. The cavity has a horizontal cross section of 52mm×42mm and the thikkness of the liquid layer is 4mm. Temperature difference between two sides of the liquid layer was increased gradually, and the flow in liquid layer will develop from steady to unstable convection. An optical diagnostic system consisting of a revised Michelson interferometer with image processor was developed to study fluid Surface Deformation in convection, and the displacements of free Surface oscillation were determined. PIV technique was adopted to observe the evolution of flow pattern, and the velocity fields were obtained quantitatively. The present experiments demonstrate that Surface Deformation is quite distinct in buoyant-thermocapillary convection. in order to understand the mechanism of buoyant-thermocapillary convection, not only the hydrothermal wave instability but also the Surface wave instability should be discussed.
-
Optical methods on measuring Surface Deformation and Surface wave in the thermal capillary convection
Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002, 2003Co-Authors: Li Duan, Qi KangAbstract:An optical diagnostic system consisting of the Michelson interferometer with the image processor has been developed for the study of the kinetics of the thermal capillary convection. The capillary convection, Surface Deformation, Surface wave and the velocity field in a rectangular cavity with different temperature's sidewalls have been investigated by optical interference method and PIV technique. In order to calculate the Surface Deformation from the interference fringe, Fourier transformation is used to grating analysis. The quantitative results of the Surface Deformation and Surface wave have been calculated from the interference fringe pattern.
Emmanuelle A Marquis - One of the best experts on this subject based on the ideXlab platform.
-
the role of Surface Deformation in the oxidation response of type 304 ss in high temperature deaerated water
Corrosion Science, 2018Co-Authors: Kevin Fisher, B D Miller, E C Johns, Emmanuelle A MarquisAbstract:Abstract The oxide products found on austenitic stainless steels after high temperature exposures in nuclear reactor environments are well documented, but the mechanisms for the oxide formation are still ambiguous. One issue of practical importance is the role of Surface Deformation on the oxidation response. To address this question, short high-temperature water exposures were conducted on electropolished and ground Surfaces of Type 304 stainless steel. Characterization of the developing oxide scales using transmission electron microscopy and atom probe tomography revealed significantly different responses from the two Surface finishes. In the absence of sub-Surface Deformation, the oxide scale grows as an equilibrium phase of uniform composition with accumulation of Cu to the metal/oxide interface. In the presence of significant sub-Surface Deformation, a non-equilibrium nanostructured oxide scale develops as a result of selective oxidation along fast diffusion paths.
