Accession Number : AD0611612

Title :   A CONTINUOUSLY PUMPED ULTRA-HIGH VACUUMSORPTION SYSTEM FOR THE PREPARATION OF HIGHLY ORDERED SINGLE-CRYSTAL METAL FOILS,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING MECHANICS

Personal Author(s) : Murr,L. E.

Report Date : 18 SEP 1964

Pagination or Media Count : 7

Abstract : A simple sorption-type ultra-high vacuum system has been devised in which thin metal foils can be prepared quickly, with perfection and measurable reproducibility. Ultimate vacuum of 3 X 10 to the minus tenth power torr had been obtained using liquid nitrogen around the sorption, and evaporation chambers. Ultimate vacuum of 3 X 10 to the minus tenth power torr has been routine prior to evaporation of gold, silver, copper, and nickel foils which ranged in thickness from 500-2000 a. High purity single crystal silver foils have been repeatedly prepared in this system which are suitable for direct analysis of deformations by transmission electron miscroscopy. A comparison is made between the order and quality of these ultra-high vacuum prepared foils with foils prepared using commercially available high vacuum equipment. (Author)

Descriptors :   (*VACUUM APPARATUS, VAPOR PLATING), (*VAPOR PLATING, FOILS(MATERIALS)), (*FOILS(MATERIALS), METALS), SINGLE CRYSTALS, VACUUM PUMPS, PREPARATION, ELECTRON MICROSCOPY, EPITAXIAL GROWTH, SORPTION, EVAPORATION, NITROGEN, GOLD, SILVER, COPPER, NICKEL

Distribution Statement : APPROVED FOR PUBLIC RELEASE