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Usefulness of a 1γ plot in the theory of thermal etching

✍ Scribed by J.L Meijering


Publisher
Elsevier Science
Year
1963
Weight
446 KB
Volume
11
Category
Article
ISSN
0001-6160

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✦ Synopsis


If l/y, the reciprocal of the surface free onergy, is plotted radially as a function of orientation, the resulting surface can be treated just as a free-enthalpy surface of a ternary system. Double and triple tangent planes yield orientation domains where a macroscopic plane surface will break up into two and three sorts of facets respectively. One of the results is that theoretically a Wulff equilibrium form may have edges petering out in a continuously curved surface.

UTILTTE

DE LA REPRESENTATION l/u DANS LA T~EORIE DE L'ATTAQUE THER~IQUE Si l'on trace en representation radiale la reciproque 11~ de I'energie libre de surface en fonction de l'orientation. la surface resultante peut Btro oonsideree comme une surface d'enthalpie libre d'un systeme ternaire. Les plans de tangenoe double et triple indiquent les domaines d'orientation pour lesquels une surface plane macroscopique se modifiera respectivement en deux ou trois types de facettes. Un des resultats de oette representation est que, en theorie, une forme d'equilibre de Wulff peut presenter des angles qui s'amortissent pour former une surface courbe continue. U'BER DIE ZWECKMASSIGKEIT DER l/y-KURVE IN DER THEORIE DES TH~R~ISCHE~ ATZENS Wenn man l/r, den Kehrwert der Freien Ober~chenenergie, radial als Funktion der Orientierung auftragt, kann man die resultierende F&he behandeln wie die Flache der Freien Enthalpie eines ternaren Systems. Beriihrungsebenen mit doppelter und dreifacher Bertihrung ergeben Orientierungsbereiche, wo eine makroskopisch ebene Flache in zwei oder drei Gruppen von Facetten aufbreohen wird. Unter anderem ergibt sich, da13 eine nach Wulff konstruierte Gleichgewicht,sform theoretisch Kanten haben kann, die in eino stetig gekriimmte Flache auslaufen.


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