2026-09-24T04:17:17Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/25734 2023-07-10 col_2142_8859 col_2142_5131 com_2142_8858 com_2142_234 com_2142_5130

Granato, A.V. Holder, Jon Thomas 2011-07-08T18:30:22Z 2011-07-08T18:30:22Z 10000-01-01 1968 Using thermodynamics and elasticity theory, a unified treatment of changes in the properties of crystals containing the major types of defects is given. Some previously derived results are recovered in the present calculations, such as the formula for volume changes of self-stressed media derived by Zener. However the present results are of a more general nature and the method is not restricted to static, isotropic, elastic systems at zero pressure. For defects described by elastic strains, it is shown that the required pressure and temperature dependence is given by using the known pressure and temperature dependent elastic constants in place of the zero pressure elastic constants in the linear elasticity results. The general results are specialized to a number of particular defects by using models to find expressions for the energy required to form the defect, so that the thermodynamic properties can be calculated. Also thermal properties are computed by treating phonons as defects on the same basis as other defects. A number of measurements of the properties of crystals containing defects are discussed in relation to the present calculations. For the case of dislocations, where the calculations are most soundly based~ there are relatively few measurements available. On the other hand, for the discussion of the large volume of measurements available of the effects of point defects, there is no generally acceptable model for the Gibbs free energy. For dislocated crystals, a number of specific predictions are made, some of which are partially confirmed by the available data. The extent to which the properties of crystals containing point defects could be correlated on the basis of one model is explored. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-08T18:30:22Z No. of bitstreams: 1 1968_holder.pdf: 3601739 bytes, checksum: cce5a3c3cc40732d2b4742bf75396f32 (MD5) Made available in DSpace on 2011-07-08T18:30:22Z (GMT). No. of bitstreams: 1 1968_holder.pdf: 3601739 bytes, checksum: cce5a3c3cc40732d2b4742bf75396f32 (MD5) Previous issue date: 1968 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-08T18:30:22Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:53-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6079143 http://hdl.handle.net/2142/25734 en 1968 Jon Thomas Holder thermodynamic properties cystals containing imperfections elasticity theory Thermodynamics properties of crystals containing imperfections Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.