ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
The H(D) atom’s interaction with one another, ‘heavy’ interstitial atoms (O, N, C), andsubstitutional atoms is analyzed on the basis of strain-induced (elastic) interaction. The interactionenergies are calculated for bcc, fcc, and hcp metal solid solutions with regard to the discrete atomicstructure of the host lattice. The elastic constants, Born-von Karman constants of the host lattice,and concentration expansion coefficients of the solid solution lattice due to solute atoms, are used asthe parameters for numerical input. It is shown that the interaction is long-range, oscillating, andanisotropic. In all cases, the coordination shells of both types - with attraction and with repulsion -exist. The interaction energy dependence on the distance is due mainly to the crystal lattice type.The strain-induced interaction should be supplemented by repulsion in the nearest coordinationshells for the case of interstitial-interstitial interaction and by chemical interaction in the case ofH-substitutional interaction. Two examples are given for the use of the strain-induced interactionenergies in calculations relaxation processes
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.115.41.pdf
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