1.1 本试验方法包括测定烧焦烧蚀器的炭密度分布，该烧蚀器可在以下限制条件下使用: 1.1.1 必须去除局部表面缺陷，并且在确定密度分布之前，必须能够在平行于炭原始材料界面的平面内加工掉炭。 1.1.2 炭必须足够坚固，以承受所采用的机械加工和处理技术。 1.1.3 材料应具有有序的密度变化。炭和降解区的总厚度必须大于所需的加工厚度。 1.2 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。 1.2.1 例外- 括号中包含某些英寸-磅当量单位，仅供参考。 1.3 本标准并不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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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。

1.1 This test method covers the determination of the char density profile of a charred ablator that can be used with the following limitations: 1.1.1 The local surface imperfections must be removed, and the char must be able to be machined off in a plane parallel to the char-virgin material interface before the density profiles can be determined. 1.1.2 The char must be strong enough to withstand the machining and handling techniques employed. 1.1.3 The material should have orderly density variations. The total thickness of the char and degradation zone must be larger than the machining thicknesses required. 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exception— Certain inch-pound equivalent units are included in parentheses for information only. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.