𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Dimensional changes in graphite irradiated between 500° and 1100°C

✍ Scribed by R.J Price; J.C Bokros

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
934 KB
Volume
5
Category
Article
ISSN
0008-6223

No coin nor oath required. For personal study only.

✦ Synopsis

Two previously proposed quantitative models for the radiation-induced dimensional changes in polycrystalline graphite treated the material as containing a single crystalline phase. One model was based on thermodynamic relationships and the other was derived by averaging the contributions of the individual crystallites. A third model emphasized the effects of small quantities of a second, less crystalline phase, but this model has not been expressed analytically. In the present work, measurements of dimensional changes in radial, circumferential, and longitudinal samples from an extruded graphite tube irradiated to exposures between 1.5 and 2.4 x 102r nvt (E>0.18

MeV) at temperatures between 540" and 1060°C were compared with the relationships predicted by the two quantitative models. It was found that the data agreed best with the single-phase thermodynamic model.

📜 SIMILAR VOLUMES

The relationship between irradiation tem
The relationship between irradiation temperature and dimensional changes of nuclear graphites
✍ M Van den Berg; M.R Everett; A Kingsbury 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 131 KB

The characterization of property changes in various grades of near-isotropic, "binderless" grades of graphite as functions of fluence accumulated at 715°C from 0 to 42 x 10" neutrons/cm' (E > 50 keV) was made. Generally, the average coefficients of thermal expansion (CTE) from 20 to 600°C and the ro

Anomalous stored energy and c-axis chang
Anomalous stored energy and c-axis changes in alternately irradiated and annealed graphite
✍ Donald G Schweitzer; Robert M Singer 📂 Article 📅 1964 🏛 Elsevier Science 🌐 English ⚖ 487 KB

Stored energy releases in graphites exhibiting normal and enhanced dimensional changes indicate that the change in rate of dimensional expansion after large neutron irradiations is due to a change in apparent defect volume and is not due to a change in the rate of accumulation of defects. Reverse st

The dimensional changes of highly-orient
The dimensional changes of highly-oriented pyrolytic graphite irradiated with fast neutrons at 430°C and 600°C
✍ J.E. Brocklehurst; B.T. Kelly 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 382 KB

Samples of highly oriented graphite heat-treated to final temperatures of 2,000, 2,200, 2,400, 2,800 and 3,OOo"C have been successively irradiated with fast neutrons at controlled temperatures of430" and 600°C in the PLUTO Materials Testing Reactor. The dimensional changes of these samples, measured