1.1 本试验方法涵盖金属粉末表面积的测定。试验方法规定了适用于许多商业物理吸附仪器的一般程序。该方法为所列材料提供了特定的样品放气程序。它包括其他金属的其他一般放气说明。Brunauer、Emmett和Teller（BET）的多点方程， 2. 以及BET方程的单点近似，构成所有计算的基础。 1.2 本试验方法不包括适用于金属材料放气的所有现有程序。 包括的程序为实验室间测试期间分析的样品提供了可接受的结果。研究者应确定所列程序的适当性。 1.3 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3.1 以国际单位制表示所有数值，除非特定仪器软件使用替代单位报告表面积。在这种情况下，在最终书面报告中提供报告的和等效的国际单位制。 许多仪器报告表面积为m 2. /g、 而不是使用正确的国际单位制（m 2. /千克）。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 金属供应商和用户都可以从这些材料的表面积知识中受益。许多中间和最终加工步骤的结果由金属的比表面积控制或与之相关。许多烧结或铸造金属结构的性能可以从起始金属粉末或全部或部分成品的比表面积来预测。

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), 2 along with the single point approximation of the BET equation, forms the basis for all calculations. 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 Units— The 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 m 2 /g, instead of using correct SI units (m 2 /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. ====== 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.