Oxidation Behaviour of Ieabct Deposited NiCoCrAlY-ZrO2·y2O3 Coating

1991 ◽  
Vol 249 ◽  
Author(s):  
N. K. Huang ◽  
D. Z. Wang ◽  
Z. R. Feng
Keyword(s):  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Oxidation Behaviour ◽  
Air Exposure ◽  
Combination Technique ◽  
Bond Layer ◽  
Metallic Bond ◽  
Before And After ◽  
Oxidation Exposure ◽  
Y2o3 Coating

ABSTRACTThe oxidation behaviour of NiCoCrAlY-ZrO2·y2O3 coatings produced by using an ion-electron-atom beams combination technique (IEABCT) was studied after air exposure at 1100 °C for up to 300 hours. It was found that pores were dispersed in the coating, especially in the interface between coating and substrate, and no spallation or separation of the ceramic layer from the metallic bond layer were observed. The composition and morphology of the coatings before and after oxidation exposure in air at 1100 °C for 300 hours were examined by microscopy and electron microprobe analysis (EMPA).

Scanning Electron Microscopy and Electron Microprobe Analysis of Malignant Cell Cultures

1968 ◽  
Vol 26 ◽  
pp. 164-165
Author(s):  
R. I. Johnsson-Hegyeli ◽  
A. F. Hegyeli ◽  
D. K. Landstrom ◽  
W. C. Lane
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cell Cultures ◽  
Electron Microprobe ◽  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Three Dimensional ◽  
Malignant Cell ◽  
Interference Microscopy ◽  
Scanning Electron

Last year we reported on the use of reflected light interference microscopy (RLIM) for the direct color photography of the surfaces of living normal and malignant cell cultures without the use of replicas, fixatives, or stains. The surface topography of living cells was found to follow underlying cellular structures such as nuceloli, nuclear membranes, and cytoplasmic organelles, making possible the study of their three-dimensional relationships in time. The technique makes possible the direct examination of cells grown on opaque as well as transparent surfaces. The successful in situ electron microprobe analysis of the elemental composition and distribution within single tissue culture cells was also reported.This paper deals with the parallel and combined use of scanning electron microscopy (SEM) and the two previous techniques in a study of living and fixed cancer cells. All three studies can be carried out consecutively on the same experimental specimens without disturbing the cells or their structural relationships to each other and the surface on which they are grown. KB carcinoma cells were grown on glass coverslips in closed Leighto tubes as previously described. The cultures were photographed alive by means of RLIM, then fixed with a fixative modified from Sabatini, et al (1963).

scholarly journals Petrology and mineralogy of the Viñales meteorite, the latest fall in Cuba

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110198
Author(s):  
Feng Yin ◽  
Deqiu Dai
Keyword(s):  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Optical Microscope ◽  
Chemical Compositions ◽  
Atmospheric Entry ◽  
Thin Sections ◽  
Homogeneous Chemical ◽  
Del Rio ◽  
The Masses ◽  
Metal Phases

The new Cuban chondrite, Viñales, fell on February first, 2019 at Pinar del Rio, northwest of Cuba (22°37′10″N, 83°44′34″W). A total of about 50–100 kg of the meteorite were collected and the masses of individual samples are in a range 2–1100 g. Two polished thin sections were studied by optical microscope, Raman spectroscopy and electron microprobe analysis in this study. The meteorite mainly consists of olivine (Fa24.6), low-Ca pyroxene (Fs20.5), and troilite and Fe-Ni metal, with minor amounts of feldspar (Ab82.4-84.7). Three poorly metamorphosed porphyritic olivine-pyroxene and barred olivine chondrules are observed. The homogeneous chemical compositions and petrographic textures indicate that Viñales is a L6 chondrite. The Viñales has fresh black fusion crust with layered structure, indicating it experienced a high temperature of ∼1650°C during atmospheric entry. Black shock melt veins with width of 100–600 μm are pervasive in the Viñales and olivine, bronzite, and metal phases are dominate minerals of the shock melt vein. The shock features of major silicate minerals suggest a shock stage S3, partly S4, and the shock pressure could be >10 GPa.

Archaeometry of medieval Islamic glazed ceramics from North Yemen

1988 ◽  
Vol 66 (2) ◽  
pp. 266-272 ◽  
Author(s):  
Jessica R. Hallett ◽  
Michael Thompson ◽  
Edward J. Keall ◽  
Robert B. Mason
Keyword(s):  
Electron Microprobe ◽  
Microscopic Examination ◽  
Lead Oxide ◽  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Annealing Temperatures ◽  
Safety Limit ◽  
Cobalt Blue

Microscopic examination and electron microprobe analysis were employed to determine the materials and techniques used to decorate ten glazed types of medieval Islamic ceramics from North Yemen. Eight types were underglaze-painted, one was slip-painted, and one was monochrome glazed. The glazes were of two compositions, soda–silica and lead oxide – silica with annealing temperatures of approximately 835 and 640 °C, respectively. The colourants used in the glazes and paints were cobalt (blue), iron (green), copper (green and blue), and antimony (yellow). Where clay slips or slip-paints were present, alumina enrichment of the glaze had occurred during application or firing, and pigment-paints on top of slip grounds masked enrichment. The Mellor ratio for the lead glazes ranges from 0.68 to 0.74 and is well above the acceptable safety limit of 0.5.

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