Graphite property

Table 1. Effect of One Pitch Impregnation on Graphite Properties...

The erosion of graphite in nozzle appHcations is a result of both chemical and mechanical factors. Changes in temperature, pressure, or fuel-oxidizing ratio markedly affect erosion rates. Graphite properties affecting its resistance to erosion include density, porosity, and pore size distribution... 

Graphite properties conducive to successful electrolytic appHcation include high electrical conductivity, high degree of insolubiUty and operation at low voltage, high purity, low initial cost, easily machinable, and few limitations as to size and shape. 

Correlation cf graphite properties with processing methodology... 

Radiolytic oxidation is important to the design and operation of reactors because it adversely affects key graphite properties and, by removing moderator material, may bring about the need for increased fuel enrichment. As mentioned earlier, an inhibitor (methane) is added to the coolant to reduce radiolytic oxidation to acceptable levels. However, access of the inhibitor to the inner portions of the moderator brick must be assured. Two approaches have been adopted in the AGRs to provide this access. Vertical methane access holes are provided in the fuel bricks and in the later stations, Heysham II and Tomess, a pressure drop from outside to inside the brick was established to cause an enhanced flow through the brick. The amount of inhibitor added must be restricted, however, because the carbon inhibition reaction product deposits on the fuel pin and restricts heat transfer to the coolant, thus reducing reactor efficiency. 

Stein, S. E. Brown, R. L. Pathways to Graphite Properties of Very large Polybenzolde Hydrocarbons, VCH-Verlag Wein-heim, 1987. 

Table 2. Candidate Graphites Properties of PoCo Graphite)"...

Strictly speaking, the designation graphite fluoride is a misnomer, for the various materials with the formula do not have graphitic structures or graphitic properties for example, they do not conduct electricity. The consensus of the available evidence [65, 66, 67, 68, 69] is for the structure shown in Fig. 19-15, in which the carbon... 

Xaibcfents andatiould rel e agents easier processing, stearates, waxes improved. surface PTFE, M0S2, graphite properties external and internal lubrication... 

Barnes AB, Dauche FM, Gallego NC, Fain CC, Thies MC, As-spun orientation as an indication of graphitized properties of mesophase based carbon fiber. Carbon, 36(7-8), 855-860, 1998. 

---