Accession Number : AD0266637

Title :   THE REBINDER EFFECT AND THE ADSORPTION-LOCKING OF DISLOCATIONS IN LITHIUM FLUORIDE

Corporate Author : MARTIN CO BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES

Personal Author(s) : WESTWOOD,A.R.C.

Report Date : 30 SEP 1961

Pagination or Media Count : 1

Abstract : Aqueous solutions of long chain fatty acids can serve as etchants for LiF. Such etchants made it possible to study effects of various environments on cross-gliding of screw dislocations at the surface of a crystal. Observations suggest that chemisorbed polar molecules restrict the motion of screw dislocations via adsorptionlocking. An estimate of the strength of such locking is made and its existence confirmed by studies on the yielding behavior of LiF crystals. In contrast to Rebinder's (Proc. 2nd Intern, Cong. of Surf. Activity, 2:295, 1957) observations with metal crystals, adsorbed polar molecules cause an increase in yield and critical resolved shear-stresses before inducing the lower rate of work-hardening commonly known as the Rebinder-effect. (Author)

Descriptors :   *CRYSTALS, *DEFORMATION, *FLUORIDES, *LITHIUM COMPOUNDS, *SINGLE CRYSTALS, ADSORPTION, CHEMICAL MILLING, CRYSTAL LATTICES, FATTY ACIDS, HARDENING, MICROPHOTOGRAPHY, MOLECULES, STEARIC ACID, STRESSES, SURFACES, TEST METHODS, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE