Issues »  Volume 37, Issue 8

Elastic Modulus and Nanohardness of Non-Work-Hardened Palladium Hydride

M. V. Goltsova$^{1}$, E. N. Lyubimenko$^{2}$, G. N. Tolmacheva$^{3}$, G. I. Zhirov$^{1}$

$^{1}$Belarusian National Technical University, 65 Nezavisimosti Ave., 220013, Minsk, Republic of Belarus
$^{2}$Donetsk National Technical University, 2 Shybankov Sqr., UA-85300 Pokrovs’k, Ukraine
$^{3}$National Science Center Kharkov Institute of Physics and Technology, NAS of Ukraine, 1 Akademicheskaya Str., 61108 Kharkov, Ukraine

Received: 15.03.2015; final version - 12.05.2015. Download: PDF

Using a nanoindentation technique with Nano Indenter G200 equipment, nanohardness and elastic modulus of cold-hardened palladium, annealed one, and palladium saturated with hydrogen are investigated. Saturation with hydrogen is carried out in the original hydrogen—vacuum apparatus HVD-3, ‘bypassing’ the two-phase state cupola to prevent decomposition of the solid solution of hydrogen within the palladium. As found, the nanohardness of annealed low-defect $\beta$-palladium hydride is by 30% less than that of annealed palladium (0.842 GPa). There is a tendency to lowering the elastic modulus of palladium hydrogenated by the means of ‘bypassing’ the two-phase region cupola as compared to annealed palladium. Additional X-ray analysis results allow concluding that differences in values of elastic moduli of $\beta$-PdH$_{x}$ samples tested after 12 and 36 hours of in-air exposure can be explained by the process of rearrangement of hydrogen within the samples, not by hydrogen degassing.

Key words: nanoindenting, palladium hydride, elastic modulus.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i08/1135.html

DOI: https://doi.org/10.15407/mfint.37.08.1135

PACS: 06.60.Ei, 62.20.de, 62.20.fk, 62.20.Qp, 62.25.Mn, 68.35.bd, 81.40.Ef

Citation: M. V. Goltsova, E. N. Lyubimenko, G. N. Tolmacheva, and G. I. Zhirov, Elastic Modulus and Nanohardness of Non-Work-Hardened Palladium Hydride, Metallofiz. Noveishie Tekhnol., 37, No. 8: 1135—1146 (2015) (in Russian)

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