ASTM B 859 Standard Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis
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ASTM B 859 Document Information:
Title
Standard Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis
ASTM International
Publication Date:
Oct 1, 2003
Scope:
This practice covers the de-agglomeration of refractory metal powders
and their compounds in
preparation for particle size analysis.
Experience has shown that this practice is satisfactory for the
de-agglomeration of elemental
tungsten, molybdenum, rhenium, and tantalum metal powders, and
tungsten carbide. Other metal
powders (for example, elemental metals, carbides, and nitrides) may be
prepared for particle size
analysis using this practice with caution as to effectiveness until
actual satisfactory experience
is developed.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. For
specific precautionary statements, see Note 2.
Footnote * - A Summary of Changes section appears at the end of this Standard.
Keywords:
- de-agglomeration
- laboratory-milled
- laboratory milling
- molybdenum
- particle size analysis
- powders
- refractory metals
- rhenium
- rod-milled
- rod milling
- tantalum
- tungsten
- tungsten carbide
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