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Title: THE APPLICATION OF ULTRAFINE PARTICLES IN TUNGSTEN POWDER METALLURGY

Abstract

Ultra-fine tungsten powder (3.7 m/sup 2//g surface area), in amounts up to 25%, was mixed with commercial tungsten powders of 2, 4.5, and 6.8 micron average particle size. When compacted at 60 tsi, the densities varied from 69% (of theoretical) for the 2 micron admixture to 76% for the 6.8 micron admixture. Upon sintering in hydrogen for three hours at 1700 deg C, the corresponding values were 92% and 80%. The highest sintered densities were obtained in every case with the largest addition of ultra-fine powder. The radial/axial shrinkage ratio of the compacts was found to correlate with the density increase during sintering. This ratio (varing from 0.80 to 1.86 for all the mixtures) decreased with increasing amount of densification for each series of specimens. (auth)

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos Scientific Lab., N. Mex.
OSTI Identifier:
4764924
Report Number(s):
LAMS-2736
NSA Number:
NSA-16-033452
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-62
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; COMPACTING; DEFORMATION; DENSITY; DISTRIBUTION; GRAIN SIZE; HYDROGEN; MIXING; POWDERS; SINTERING; TUNGSTEN

Citation Formats

Mundinger, P R, Hausner, H H, and Lenz, W H. THE APPLICATION OF ULTRAFINE PARTICLES IN TUNGSTEN POWDER METALLURGY. United States: N. p., 1962. Web.
Mundinger, P R, Hausner, H H, & Lenz, W H. THE APPLICATION OF ULTRAFINE PARTICLES IN TUNGSTEN POWDER METALLURGY. United States.
Mundinger, P R, Hausner, H H, and Lenz, W H. Sun . "THE APPLICATION OF ULTRAFINE PARTICLES IN TUNGSTEN POWDER METALLURGY". United States.
@article{osti_4764924,
title = {THE APPLICATION OF ULTRAFINE PARTICLES IN TUNGSTEN POWDER METALLURGY},
author = {Mundinger, P R and Hausner, H H and Lenz, W H},
abstractNote = {Ultra-fine tungsten powder (3.7 m/sup 2//g surface area), in amounts up to 25%, was mixed with commercial tungsten powders of 2, 4.5, and 6.8 micron average particle size. When compacted at 60 tsi, the densities varied from 69% (of theoretical) for the 2 micron admixture to 76% for the 6.8 micron admixture. Upon sintering in hydrogen for three hours at 1700 deg C, the corresponding values were 92% and 80%. The highest sintered densities were obtained in every case with the largest addition of ultra-fine powder. The radial/axial shrinkage ratio of the compacts was found to correlate with the density increase during sintering. This ratio (varing from 0.80 to 1.86 for all the mixtures) decreased with increasing amount of densification for each series of specimens. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4764924}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1962},
month = {7}
}

Technical Report:
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