An Internal Friction Study of N-H and O-H Pairs in Single Crystal of Niobium at Low Temperatures

Effects of oxygen and hydrogen on tensile and internal friction properties of niobium-vanadium alloys

“…Owen et al [10] have shown that in the absence of hydrogen there are no relaxation peaks in a Nb-15 at$ V alloy in the temperature range 77-290 K. A similar behavior is also assumed for the Nb-10 at$ V alloy. Hanada et al [51] have identified a relaxation peak associated with an 0-H complex in niobium at -50 K (f=0.445 Hz), but results of the high frequency measurements in the present study show that this peak is absent in the Nb-10 at$ V alloys. The absence of the 0-H peak is interpreted as due to trapping of oxygen by vanadium atoms.…”

Hydrogen interaction with dissolved atoms in metal solid solutions

“…It is known that the hydrogen Snoek-type maximum is caused by the diffusion under stress of H or D atoms near the immobile O or N atoms [28][29][30][31][32][33][34]. Therefore for such calculations one needs the values for the H-H(D-D) and H(D)-O(N) interaction energies.…”

“…It was shown that the H-H repulsion for V, Nb and Ta [9] and H-N repulsion for Nb and Ta [9,26] extend up to three coordination shells. Behavior of the hydrogen atoms in Table 2 Comparison of calculated and experimental temperatures of internal friction peaks [12] Alloys (K) 50 [28] 79 [29,30] 106 [30,31] 77 [29] 60 [32] 50 [33] 126 [34] a solid solution is determined both by a repulsion distance and elastic interaction energies outside the radius of repulsion. Computer simulation of the temperature dependence of hydrogen diffusion in Pd, Cu, and Ni with a low hydrogen concentration of 0.11 at.% [9] showed that such additional repulsion is absent.…”

Effect of hydrogen, deuterium and oxygen on the anelastic properties of refractory alloys

“…The effect of oxygen on the hydrogen relaxation has been examined in the refractory metals (22)(23)(24)(25) in the temperature range of 4 to 100 K. Schiller et al (22) reported that the hydrogen peak height in niobium is dependent on the oxygen concentration. However to the present authors knowledge, the effect of hydrogen on the oxygen peak was not explored previously.…”

“…Internal friction spectra of hydrogen in refractory metals has been measured by many researchers. However, the previous studies have predominantly involved hydrogen in the pure metal (22)(23)(24)(25)(27)(28)(29)(30)(31)(32)(33)(34)(35). Because the hydrogen terminal solubility increases with alloy additions (3), recent interest has been in refractory alloys (36)(37)(38)(39).…”