Internal friction and substitutional-interstitial interaction in niobium-based alloys

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作者：

机构：

[1] Kushnareva, N.P.

[2] Snejko, S.E.

来源：

Kushnareva, N.P. | 1600年 / Elsevier Science S.A., Lausanne, Switzerland卷 / 211-1期

关键词：

Atoms - Composition effects - Computer aided analysis - Computer software - Curve fitting - Internal friction - Least squares approximations - Measurements - Molybdenum alloys - Oxygen - Relaxation processes;

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摘要：

The logarithmic decrement δ was measured in Nb-Mo(V)-O alloys with Mo(V) content up to 50 at.% using a low frequency (f = 3-7 Hz) inverse torsion pendulum in the temperature range from 20 to 700 °C. The complex δ vs. T curves were analysed in terms of their constituent peaks using a computer. The parameters of these ...APPEND 984... peaks were used to derive information on the distribution of oxygen atoms over octahedral interstitial sites differing in the number of Mo(V) atoms contained in the surrounding nearest-neighbour lattice sites. This information was used for determining the Mo(V)-O binding energy and the structure potential barrier for oxygen atom diffusion in alloys with strong (V-O) and weak (Mo-O) interactions.

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