| Автор | B Sobha |
| Автор | B Coluzzi |
| Автор | F M Mazzolai |
| Автор | A P Craft |
| Автор | T B Flanagan |
| Дата выпуска | 1992-03-30 |
| dc.description | The internal friction (IF) has been measured as a function of the H (D) content in the disordered and ordered Pd<sub>3</sub>Mn system between 90 and 400 at frequencies in the range 180-5300 Hz. Relaxation processes due to stress-assisted motion of H (D) have been identified and their spectra of relaxation times, heights and temperatures determined as a function of H content and the state of long-range order. The main observations in the case of the alloy in the disordered state are an increase with n (n=H (or D)/(Pd+Mn) at.) of the height and width of the peak and a decrease of the peak temperatures. These effects have been attributed to progressive filling by H of higher energy I<sub>5</sub> sites (sites having five nearest-neighbour Pd atoms), which differ in terms of atomic arrangements in the second and more distant shells of neighbours. The partial molar enthalpy Delta H<sub>H</sub> for H solution has also been determined both in the disordered and ordered states of the Pd<sub>3</sub>Mn alloy. In the disordered state Delta H<sub>H</sub> is found to increase rapidly with n starting from values of n as low as 0.01. The concentration dependence of Delta H<sub>H</sub> as well as of the height of the IF peak reveal strong hydrogen-hydrogen repulsions. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Hydrogen interactions as studied by internal friction and solubility measurements in a Pd<sub>3</sub>Mn alloy |
| Тип | paper |
| DOI | 10.1088/0953-8984/4/13/004 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 4 |
| Первая страница | 3377 |
| Последняя страница | 3387 |
| Аффилиация | B Sobha; Dept. of Phys., Perugia Univ., Italy |
| Аффилиация | B Coluzzi; Dept. of Phys., Perugia Univ., Italy |
| Аффилиация | F M Mazzolai; Dept. of Phys., Perugia Univ., Italy |
| Аффилиация | A P Craft; Dept. of Phys., Perugia Univ., Italy |
| Аффилиация | T B Flanagan; Dept. of Phys., Perugia Univ., Italy |
| Выпуск | 13 |
