THE EFFECT OF VACUUM PRESSING ON THE PROPERTIES OF GRAPHITE ELECTRODES (in Russian)
Graphite samples were pressed in an electrically-heated press at a temperature of 106 to 110 deg C at a pressure of 1000 kg/cm/sup 2/. The apparent specific gravity of the sample increased from 1.721 at a residual pressure of 746 mm Hg std to 1.761 at a residual pressure of 10 mm Hg std. Vacuum was then applied to the pressing of graphitic rods 50 mm in diameter and electrodes 75 mm in diameter. A significant increase in density and mechanical strength was observed at a vacuum of approximates 700 mm Hg std. The apparent specific gravity increased from 1.579 without the use of vacuum to 1.646 at a residual pressure of 40 to 80 mm Hg std during pressure. The mechanical strength in compression increased from 213 to 264 kg/cm/sup 2 for the vacuum-pressed sample. The bending strength increased from 96 to 126 kg/cm/sup 2/, and the rupture strength increased from 49 to 67 kg/cm/sup 2/. The porosity of the graphite decreased from 28.2 to 25.5%. The vacuum-pressed sample resisted oxidation a factor of two better om being heated to 700 deg C for a period of 2 hours. The higher the applied vacuum, the better was the improvement in physical properties. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-008854
- OSTI ID:
- 4093264
- Journal Information:
- Tsvetn. Metal., Vol. Vol: No. 9; Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
Similar Records
STUDY ON THE FABRICATION OF THE BeO-UO$sub 2$ SINTERED BODY BY MEANS OF VACUUM HOT PRESSING
THE RECRYSTALLIZATION DIAGRAM OF CAST TUNGSTEN