| Autor: |
Tashmetov, M. Yu., Yuldashev, B. S., Adizov, S. M., Kichanov, S. E., Pidaev, Sh. R., Ismatov, N. B., Dvurechenskaya, N. D., Saprykina, I. A., Abdurakhimov, B. A., Khallokov, F. K. |
| Zdroj: |
Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Aug2024, Vol. 18 Issue 4, p874-880, 7p |
| Abstrakt: |
The penetration of corrosion into the volume of the copper coin of Euthydemus I and the fragments of rings from the Uzundara fortress was studied by the methods of neutron radiography and tomography using a facility installed on the horizontal beamline of the WWR-SM nuclear reactor of the Institute of Nuclear Physics, Academy of Sciences of the Republic of Uzbekistan. Three-dimensional models of the studied archaeological objects were reconstructed, and the volume fractions of the initial metal and corrosive materials were calculated. A large number of pores and cavities were found inside the volume of the coin, which may indicate a violation or imperfection of the casting technology, as well as active chemical processes due to the interaction of the coin with the soil. X-ray diffraction studies have established the presence of phases of copper, cuprite Cu2O, and nantokite CuCl on the surface of the Euthydemus I coin. According to neutron tomography data, the volume content of copper and corrosion products was determined to be 1469.93(2) and 169.04(2) mm3, respectively. The distribution of pores in the volume of the Euthydemus I coin by an equivalent diameter has also been established. Two rings were studied at the neutron radiography and tomography facility; the volume of the first ring was 1491.17(6) mm3, and the volume of a certain corrosion was 135.69(7) mm3. On the second ring, the corrosion volume was 373.67(3) mm3, which is 12.1% of the total ring volume. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink