Accession Number:

AD0699650

Title:

THE EFFECT OF VARIOUS ADDITIVES ON THE PROPERTIES OF TUNGSTEN,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1969-09-13

Pagination or Media Count:

17.0

Abstract:

The effects of rare and rare earth metals on the properties of tungsten containing silicate additive, on the thermoemission properties, and on the welding characteristics of tungsten were studied. Compositions containing tungsten, silicate and rare or rare earth metals were prepared from tungsten anhydride, potassium silicate 0.45 percent and oxides of Zr, Be, B, Hf, Ti, Gd, Nd, Y, and Yh within range of 0.01-0.5 percent the obtained metal powders were molded, extruded into wire, subjected to recrystallizing annealing at 240 C, and subjected to 0.67 kgcmsuperscript 2 load under vacuum at 2500C. Of all the examined additives, only the boron oxide added as borax had positive effects on tungsten properties. The nonsagging properties of tungsten composition containing 0.2 percent B plus 0.45 percent SiO 2 as K 2 SiO 3 plus 0.6 percent KC1, are similar to those of tungsten VA, but the new composition does not have any particular advantages over tungsten VA. This composition can be used as the incandescent body in lamps, but is at a disadvantage when considered for Welding rods. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE