Semerenko Y. The influence of casual structural imperfections on the parameters of the low-temperature acoustic relaxation in BCC metals

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0403U000508

Thesis Registration Form

0403U000508.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

24-04-2001

Specialized Academic Board

Д.64.175.03

Essay

Objects: the samples of iron and niobium with various defect structure. Goals: investigation the elementary processes of dislocation motion and acoustic relaxation in the materials with local structural imperfections. Methods: mechanical spectroscopy, methods of theoretical physics, statistics and calculation analysis. New results: it is shown, that the influence of changes of the defect structure on the relaxation resonance may be described in the assumption of the statistical scatter of the activation energy and the dependence of the parameters of the statistical distribution of the activation energy on the external factors influencing the distribution of the local structural imperfections in the material. The microscopicall mechanism of the (-peak in niobium is established.

Read more

Files

aref.doc

dis1_doc--dis1.doc

Similar theses

0523U100214

Serhii V. Oliinyk

Physical basis of formation of electrical and photoelectric properties of AIIBVI crystals and electrical properties of multicomponent coatings

0522U100045

Bohdanov Yevhen Ivanovych

Effects of azimuthal asymmetry of radiation scattering in crystals and new possibilities of diffuse-dynamical diffractometry

0522U100002

Vladymyrskyi Igor A.

Thermally-induced structural phase transitions in heterogeneous systems based on magnetic and nonmagnetic nanolayers

0521U102118

Kornyushchenko Anna S.

Structure formation and physical properties of nearequilibrium metal, oxide and multicomponent condensates with nanoscale elements

0421U104047

Sumaryuk Alexander V.

High-strength composites based on silica and aluminosilicate modifiers and methods of their diagnosis