On the mechanisms of high-temperature plastic deformation in pyrolytic carbons.
Dewrinkling and diffusion mass transport mechanisms in high temperature tensile and shear plastic deformation of pyrolitic carbons
Engineering topics
Publications and source records attributed to Kotlensky, W. V..
Dewrinkling and diffusion mass transport mechanisms in high temperature tensile and shear plastic deformation of pyrolitic carbons
Analysis of high temperature tensile creep in pyrolytic graphite by Dorn method
High temperature tensile strength of glassy carbons in helium atmosphere - mechanical properties
Structural changes accompanying creep deformation of pyrolytic carbon and electron micrography and fractography of glassy carbons
Tensile properties of two grades of glassy carbon from room temperature to 2900 degrees C
Structural changes in pyrolytic graphite accompanying deformation produced by applying stress parallel to substrate examined by electron microscopy and X-ray diffraction
Pyrolytic graphite deformation and structural transformation
The room-temperature structural properties and the tensile properties up to 5000 F (275O C) were determined for ten grades of specially prepared petroleum-coke coal-tar-pitch graphites which were graphitized at 5430 F (3000 C). One impregnation with coal-tar pitch increased the bulk density from 1.41 to 1.57 g/cm3 and the maximum strength at 4500 F (2500 C) from 4000 to 5700 psi. None of the processing parameters studied had a marked effect on the closed porosity or the X-ray structure or the per cent graphitization. The coarse-particle filler resulted in the lowest coefficient of thermal expansion and the fine-particle filler in the highest coefficient. A marked improvement in uniformity of tensile strength was observed. A standard-deviation analysis gave a one-sigma value of approximately 150 psi for one of these special grades and values of 340-420 psi for three commercial grades.