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Effect of interstitial impurities on internal friction measurements in niobium
(Elsevier B.V., 2004-04-15)
Measurements of internal friction as a function of temperature were carried out in samples of mobium containing different amounts of interstitial solutes (oxygen and nitrogen) and one sample of mobium containing initially ...
Measurement of oxygen atom diffusion in Nb and Ta by anelastic spectroscopy
(ABM, ABC, ABPol, 2005-09-01)
Impurity interstitial atoms present in metals with BCC structure can diffuse in the metallic matrix by jumps to energetically equivalent crystallographic sites. Anelastic spectroscopy (internal friction) is based on the ...
Study of the Influence of the Micro-Abrasive Wear Modes on the Behaviors of the Volume of Wear and Coefficient of Friction of Thin Films Submitted to Micro-Abrasive Wear
(2019-04-13)
The purpose of this work is to study the influence of the micro-abrasive wear modes on the behaviors of the
volume of wear (V) and on the coefficient of friction (µ) of thin films. Experiments were conducted with thin
films ...
Influence of the normal force, abrasive slurry concentration and abrasive wear modes on the coefficient of friction in ball-cratering wear tests
(2014)
The purpose of this work is to study the influence of the normal force (N), abrasive slurry concentration (C) and abrasive wear modes on the coefficient of friction in ball-cratering wear tests. Experiments were conducted ...
Anelastic relaxation processes due oxygen in Nb-3.1 at.% Ti alloys
(Elsevier B.V., 2004-04-15)
In the last 50 years several studies have been made to understand the relaxation mechanisms of the heavy interstitial atoms present in transition metals and their alloys. Internal friction measurements have been carried ...
Anelastic spectroscopy in potassium aluminum metaphosphate glasses
(2006-09-15)
Anelastic spectroscopy (internal friction and the dynamic modulus) was measured by means of a torsion pendulum at 3-12 Hz, in the range of 100-300 K, for a KAP metaphosphate glass. Two thermally activated internal friction ...
Determination of the oxygen and nitrogen interstitial diffusion coeficient in niobium by mechanical spectroscopy
(ABM, ABC, ABPol, 2006-12-01)
Mechanical spectroscopy measurements have been extensively used in the last decades to obtain information about many aspects of the behavior of solutes in metallic materials. Metals of body-centered cubic lattice that ...
Stress induced ordering due interstitials in Nb-4.7 at.%Ta
(Elsevier B.V., 2005-12-05)
The presence of interstitial elements in metals cause strong changes in their physical, chemical or mechanical properties. These interstitial impurities interact with the metallic matrix atoms by a relaxation process known ...