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Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption
NORMA vydaná dňa 1.3.2022
Označenie normy: ASTM B922-22
Dátum vydania normy: 1.3.2022
Kód tovaru: NS-1051676
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report . Contact ASTM Customer Service at service@astm.org. , BET surface area, metal powders, multipoint surface area, outgassing, physical adsorption, refractory metal powders, single point surface area, specific surface area, surface area,, ICS Number Code 77.160 (Powder metallurgy)
Significance and Use | ||||||
5.1?Both suppliers and users of metals can benefit from knowledge of the surface area of these materials. Results of many intermediate and final processing steps are controlled by, or related to, specific surface area of the metal. The performance of many sintered or cast metal structures may be predicted from the specific surface area of the starting metal powder, or all or a portion of the finished piece. |
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1. Scope | ||||||
1.1?This test method covers determination of surface area of metal powders. The test method specifies general procedures that are applicable to many commercial physical adsorption instruments. The method provides specific sample outgassing procedures for listed materials. It includes additional general outgassing instructions for other metals. The multipoint equation of Brunauer, Emmett, and Teller (BET),1.2?This test method does not include all existing procedures appropriate for outgassing metallic materials. The procedures included provided acceptable results for samples analyzed during interlaboratory testing. The investigator shall determine the appropriateness of listed procedures. 1.3?UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3.1?State all numerical values in terms of SI units, unless specific instrumentation software reports surface area using alternate units. In this case, present both reported and equivalent SI units in the final written report. Many instruments report surface area as m2/g, instead of using correct SI units (m2/kg). 1.4?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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5?This 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. |
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2. Referenced Documents | ||||||
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