Accession Number:

AD0611612

Title:

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

Descriptive Note:

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING MECHANICS

Personal Author(s):

Report Date:

1964-09-18

Pagination or Media Count:

7.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE