ASTM B859-95(2000)

    Standard Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis

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    1. Scope

    1.1 This practice covers the de-agglomeration of refractory metal powders and their compounds in preparation for particle size analysis.

    1.2 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.

    1.3 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B243 Terminology of Powder Metallurgy

    B330 Test Methods for Estimating Average Particle Size of Metal Powders and Related Compounds Using Air Permeability

    B761 Test Method for Particle Size Distribution of Metal Powders and Related Compounds by X-Ray Monitoring of Gravity Sedimentation

    B821 Guide for Liquid Dispersion of Metal Powders and Related Compounds for Particle Size Analysis

    B822 Test Method for Particle Size Distribution of Metal Powders and Related Compounds by Light Scattering


    ICS Code

    ICS Number Code 77.160 (Powder metallurgy)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0859-95R00

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