Equilibrium thermodynamics and phase structure

2020 ◽  
pp. 127-148
Keyword(s):  
Phase Structure ◽  
Equilibrium Thermodynamics

Effect of cluster-gradient architecture of nanostructured topocomposites on features of tribointeraction with heterophased material

2020 ◽  
pp. 130-135
Author(s):  
D.N. Korotaev ◽  
K.N. Poleshchenko ◽  
E.N. Eremin ◽  
E.E. Tarasov
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Energy Dissipation ◽  
Phase Structure ◽  
Diffusion Processes ◽  
Structural Phase ◽  
High Wear Resistance ◽  
Wear Characteristics ◽  
And Diffusion

The wear resistance and wear characteristics of cluster-gradient architecture (CGA) nanostructured topocomposites are studied. The specifics of tribocontact interaction under microcutting conditions is considered. The reasons for retention of high wear resistance of this class of nanostructured topocomposites are studied. The mechanisms of energy dissipation from the tribocontact zone, due to the nanogeometry and the structural-phase structure of CGA topocomposites are analyzed. The role of triboactivated deformation and diffusion processes in providing increased wear resistance of carbide-based topocomposites is shown. They are tested under the conditions of blade processing of heat-resistant titanium alloy.

Microheterogeneous Polyetherhydroxylurethane Elastomers with Controlled Phase Structure for Structural Adhesives

2019 ◽  
Vol 92 (10) ◽  
pp. 1342-1350 ◽  
Author(s):  
V. N. Strel’nikov ◽  
V. Yu. Senichev ◽  
A. I. Slobodinyuk ◽  
A. V. Savchuk ◽  
E. V. Pogorel’tsev
Keyword(s):  
Phase Structure ◽  
Structural Adhesives

Miscibility and Crosslinking of Polybutadiene-Based Polyurethanes

2000 ◽  
Vol 65 (11) ◽  
pp. 1820-1832
Author(s):  
Miloslav Pekař ◽  
Pavel Kopecký
Keyword(s):  
Phase Structure ◽  
Initial Mixture ◽  
Cooperative Effect ◽  
Final Phase ◽  
Elastic Part ◽  
Hard Segments

Rheokinetics of polybutadiene-based polyurethanes was studied. Sixteen mixtures differing in the miscibility of reactive components and hard segments contents were prepared. Regardless of the miscibility of the components, the rheokinetics behaviour is qualitatively very similar. The viscous response part is formed and finished much earlier than the elastic part. The quantitative dissimilarities, caused by cooperative effect of miscibility and differences in reactivity, are described. Using a well miscible initial mixture need not give the best results as a reactive crosslinker can easily react with isocyanate and separate from the rest of the reaction mixture thus impairing the final phase structure.

Thermodynamics of porous media

1993 ◽  
Vol 443 (1917) ◽  
pp. 247-255 ◽  
Keyword(s):  
Porous Media ◽  
Elastic Energy ◽  
Pore Scale ◽  
Equilibrium Thermodynamics ◽  
Energy Potential ◽  
Macroscopic Variable ◽  
Strain Tensors

Equilibrium thermodynamics for porous media is considered with special emphasis on its basis in pore-scale thermodynamics. It is shown that porosity, the new purely macroscopic variable, enters the relations on the same footing as mass densities and the strain tensors. Biot’s use of elastic energy potential, which lies at the foundation of his theory of poroelasticity, is examined in light of the results obtained here.

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