ASTM B430-97(2006)e1

    Standard Test Method for Particle Size Distribution of Refractory Metal Powders and Related Compounds by Turbidimetry (Withdrawn 2011)

    Withdrawn Standard: ASTM B430-97(2006)e1 | Developed by Subcommittee: B09.03


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    1. Scope

    1.1 This test method covers the determination of particle size distribution of refractory metal powders with a turbidimeter (). Experience has shown that this test method is satisfactory for the analysis of elemental tungsten, molybdenum, rhenium, tantalum metal powders, and tungsten carbide powders. Other refractory metal powders, for example, elemental metals, carbides, and nitrides, may be analyzed using this test method with caution as to significance until actual satisfactory experience is developed. The procedure covers the determination of particle size distribution of the powder in two conditions:

    1.1.1 As the powder is supplied (as-supplied), and

    1.1.2 After the powder has been de-agglomerated by rod milling (laboratory milled) according to Practice B 859.

    1.2 Where dual units are given, inch-pound units are to be regarded as standard.

    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.

    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

    B330 Test Method for Fisher Number of Metal Powders and Related Compounds

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

    B859 Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis

    E456 Terminology Relating to Quality and Statistics

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    DOI: 10.1520/B0430-97R06E01

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