Accession Number:

AD0854653

Title:

Continuous Sapphire Filament Production.

Descriptive Note:

Final rept. 1 Nov 67-31 Mar 69,

Corporate Author:

TYCO LABS INC WALTHAM MA

Personal Author(s):

Report Date:

1969-04-01

Pagination or Media Count:

166.0

Abstract:

A subscale manufacturing process was developed for the production of continuous single crystal sapphire filament pulled from the melt. A continuous filament pulling device was developed which, when used with rigid and non-rigid filament guidance techniques, allowed uninterrupted pulling to continue for as long as 8 12 hours, when crucible capacity alone became the limiting factor. The continuous filament produced ranged in diameter from 1.15 to 12.40 mils and had a mean tensile strength of 246 kpsi. The grown material exhibited very minor changes in impurity level compared with the raw material used. A maximum repeatable growth rate of 1.5 inmin was achieved, with rates as high as 7 inmin being realized on a short-term basis. Author

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE