RADIATION DAMAGE IN GRAPHITE. II. CONSECUTIVE AND STEADY STATE REACTIONS OF INTERSTITIAL COMPLEXES

Technical Report · Thu Oct 31 04:00:00 EST 1963

OSTI ID:4711250

Schweitzer, D G

Periodically irradiated and annealed graphites show property changes that are markedly different from the changes after the first irradiation and anneal. Evidence is presented indicating the existence of consecutive reactions between interstitial complexes that lead to steady state concentrations of the intermediate species in a chain. The steady state concentrations result in dimensional recoveries and stored energy releases that do not increase with irradiation as they do in continuously irradiated graphites. Interstitial complexes, formed by a thermal anneal, interact through an integral chain via mobile single interstitials. Kinetic equations of chains reacting at one or both ends are described. The calculations for chains reacting at both ends show that large complexes can decompose to form smaller ones. Experimental evidence supporting the calculations shows that periodic removal of the smaller commoval of large amounts of damage associated with the layer interstitials. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• DOE Contract Number: AT(30-2)-GEN-16
• NSA Number: NSA-17-024006
• OSTI ID: 4711250
• Report Number(s): BNL-6198
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
GRAPHITE
INTERSTITIALS
IRRADIATION
MATHEMATICS
METALS, CERAMICS, AND OTHER MATERIALS
RADIATION EFFECTS
REACTION KINETICS
RECOVERY