Results 251 to 260 of about 146,657 (301)

Mechanism of the pyrolytic graphite formation

Journal of Nuclear Materials, 1965
Abstract Pyrolytic graphites have been prepared by pyrolysis of commercial propane gas on a directly heated substrate. The formation rates of the pyrolytic graphites were measured from the density and thickness of deposits obtained at 1440–2215° C, flow rates of 280–1050 cm 3 /min arid pressures of 5–200 torr.
S. Yajima, T. Satow, T. Hirai
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Compressibility of Pyrolytic Graphite

The Journal of Chemical Physics, 1964
The compressibility of pyrolytic graphite has been dynamically measured at pressures up to 0.5 megabar by utilizing explosive-generated shock waves. Shock and free-surface velocities normal and parallel to the original plane of graphite deposition were measured optically.
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Binding of nickel on pyrolytic graphite

Journal of Vacuum Science and Technology, 1977
Binding of nickel atoms deposited on a clean pyrolytic graphite surface is studied in ultrahigh vacuum using Auger electron spectroscopy (AES) and thermal desorption spectroscopy (TDS). The amount of deposition is measured with a quartz crystal microbalance. AES reveals that nickel islands are probably formed during the deposition process.
S. Sinharoy, M. Smith, L. L. Levenson
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Siliconated pyrolytic graphite

Journal of Materials Science, 1969
Seishi Yajima, Toshio Hirai
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Etch Pits in Pyrolytic Graphite

Journal of Applied Physics, 1960
The observation of etch pits in pyrolytic graphite after ion-bombardment etching is described and their similarity to dislocation etch pits is speculated. Evidence of etch-pit multiplication in the form of slip-line segments and low-angle tilt boundaries is presented.
Aram Tarpinian, George E. Gazza
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Electron microscopy of pyrolytic graphite

Journal of Materials Science, 1968
A detailed study of heat-treated and deformed pyrolytic graphite has been made using transmission electron microscopy. Single-crystal characteristics are observed in material annealed at 3600° C. Tilt boundaries are shown to be kinks in the basal planes with some twin boundaries which can be described in terms of dislocations, as for natural crystals.
L. M. Gillin, A. Kelly
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THE VAPORIZATION OF PYROLYTIC GRAPHITE

1966
Abstract : The vaporization of pyrolytic graphite was studied by the Knudsen effusion and Langmuir free vaporization techniques using a microbalance and a time-of-flight mass spectrometer. Vapor pressures were obtained in the temperature range 2417K - 2700K for C, C sub 2, and C sub 3; respective heats of vaporization were calculated by the third-law ...
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Structural features of pyrolytic graphite

Journal of Materials Science, 1967
The structure of pyrolytic graphite has been examined on several samples deposited under various conditions at 1340 to 2310° C and 5 to 200 torr by means of an X-ray technique. The structural features investigated include interlayer spacing, ordering, preferred orientation, intercrystallite porosity, and crystallite size.
T. Hirai, S. Yajima
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The young's modulus of pyrolytic graphite

Carbon, 1969
Abstract The Young's modulus of pyrolytic graphite having varying degrees of preferred orientation, has been measured using the flexural vibration technique. The results are compared with Young's Modulus values predicted using single crystal elastic constants.
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The crystallite size of pyrolytic graphite

Journal of Physics D: Applied Physics, 1970
x-ray line broadening techniques have been used to determine both a- and c-direction crystallite sizes for a range of pyrolytic graphite samples whose effective formation temperature lay between 2330 and 3020°C. x-ray line profiles were analysed using the variance method.
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