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

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

25-05-2021

Publisher

American Society for Testing and Materials

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

1.2Experience 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.

1.3Units—With the exception of the values for mass, for which the use of the gram (g) unit is the long-standing industry practice, the values stated in SI units are to be regarded as standard. No other units of measure are included in this standard.

1.4This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Note 2.

1.5This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	B 09
DocumentType	Standard Practice
Pages	6
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM B 859 : 2013 : R2018

ASTM B 761 : 2017	Standard Test Method for Particle Size Distribution of Metal Powders and Related Compounds by X-Ray Monitoring of Gravity Sedimentation
ASTM E 2651 : 2019	Standard Guide for Powder Particle Size Analysis
ASTM B 330 : 2020	Standard Test Methods for Estimating Average Particle Size of Metal Powders and Related Compounds Using Air Permeability

ASTM B 243 : 2022	Standard Terminology of Powder Metallurgy
ASTM B 761 : 2017	Standard Test Method for Particle Size Distribution of Metal Powders and Related Compounds by X-Ray Monitoring of Gravity Sedimentation
ASTM B 761 : 2017 : R2021	Standard Test Method for Particle Size Distribution of Metal Powders and Related Compounds by X-Ray Monitoring of Gravity Sedimentation
ASTM B 821 : 2022	Standard Guide for Liquid Dispersion of Metal Powders and Related Compounds for Particle Size Analysis
ASTM B 243 : 2020	Standard Terminology of Powder Metallurgy
ASTM B 243 : 2023	Standard Terminology of Powder Metallurgy
ASTM B 821 : 2023	Standard Guide for Liquid Dispersion of Metal Powders and Related Compounds for Particle Size Analysis
ASTM B 821 : 2010 : R2016	Standard Guide for Liquid Dispersion of Metal Powders and Related Compounds for Particle Size Analysis