STUDY OF THE Re0.50Rh0.50 PRODUCTS OF THERMOBARIC TREATMENT
S. A. Gromilov, T. V. D'yachkova, K. V. Yusenko, I. B. Kireenko, A. P. Tyutyunnik, Y. G. Zainulin
Keywords: rhodium, rhenium, solid substitution solution, high pressure, high temperature, X-ray phase analysis, thermolysis, microhardness
Pages: 320-324
Abstract
The products of thermobaric treatment of the metastable Re0.50Rh0.50 nanocrystalline phase (а = 2.733(2) Å, с = 4.364(4) Å, space group P63/mmc, CSR ~5 nm) in a high-pressure chamber were studied. Storage of the phase at 2000°С and 1.5 GPa for 3 min led to the formation of a fused particle (∅~1 mm). The initial composition did not change, but the coherent scattering region (CSR) increased to 52 nm. An increase to 4 GPa in pressure also did not lead to a decomposition of the metastable Re0.50Rh0.50 phase, the unit cell parameters remained the same, and the size of the CSR increased by a factor of four.
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