Room temperature elastic properties of Rh-based alloys studied by surface Brillouin scattering
| Autor: | Arthur G. Every, M. Osawa, Hirofumi Harada, J. D. Comins, B.A. Mathe, C. Sumanya |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 116:133511 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.4896843 |
| Popis: | Platinum metal group alloys are promising materials for use in a new generation of gas turbine engines owing to their excellent high-temperature properties. In the present work, room temperature elastic properties of single crystals of Rh3Nb and Rh3Zr are investigated. Surface Brillouin scattering spectra for a range of wave vector directions on the (001) surface have been acquired in order to determine the angular variation of the velocities of the Rayleigh and pseudo-surface acoustic waves and that of the longitudinal lateral wave (LLW) threshold within the Lamb shoulder. The elastic stiffness constants C11, C12, and C44 of these cubic crystal specimens have been derived using two approaches: the first involving the least-squares fit of the combined measured wave velocity data to calculated values and the second an analytical approach using the Rayleigh velocities in the [100] and [110] directions and LLW velocity in the [100] direction, and extracting the elastic stiffness constants from the secular eq... |
| Databáze: | OpenAIRE |
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