1.1 本指南涵盖了先进陶瓷的热性能测试，包括单片陶瓷、颗粒/晶须增强陶瓷和连续纤维增强陶瓷复合材料。它旨在为用户提供有关确定这些陶瓷材料热性能的特殊注意事项的指导和信息。 1.2 根据其定义和一般测试方法，介绍了五种热特性（比热容、热导率、热扩散率、热膨胀和发射率/发射率）。简要概述了高级陶瓷（单片和复合）的热性能与成分、微观结构和加工之间的关系，为评估高级陶瓷的热性能时必须考虑的材料和试样特性提供了指导。其他章节描述了取样注意事项、试样制备和报告要求。 1.3 根据测试方法概念、测试范围、试样要求、标准/参考材料、能力、限制、精度以及单片和复合陶瓷的特殊说明，将当前ASTM热性能测试方法制成表格。 1.4 本指南基于当前ASTM热性能标准的使用（如适用），以及新测试标准的制定（如必要）。本指南的目的不是严格规定先进陶瓷的特定热试验方法。考虑到最常用的ASTM热试验方法的能力和局限性，提供了如何使用这些方法的指南。 1.5 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。看见 IEEE/ASTM SI 10 . 1.6 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。 1.7 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 先进陶瓷的高温性能是许多苛刻工程应用的关键性能优势。在许多应用中，高级陶瓷必须在较宽的温度范围内工作。热膨胀、热扩散率/电导率、比热和发射率/发射率是将陶瓷组件集成到航空航天、汽车和工业系统中的关键工程因素。 5.2 本指南旨在作为测试高级陶瓷热性能的参考和信息来源，基于对这些材料的成分和微观结构与其热性能之间关系的理解。 5.3 本指南的使用有助于测试团体将ASTM热测试方法正确应用于高级陶瓷，以确保热测试结果得到正确测量、解释和理解。本指南还帮助用户选择适当的热测试方法，以评估感兴趣的高级陶瓷的特定热性能。 5.4 先进陶瓷的热性能是开发航空航天、汽车和工业应用陶瓷组件的关键数据。此外，还必须评估环境暴露对高级陶瓷热性能的影响。

1.1 This guide covers the thermal property testing of advanced ceramics, to include monolithic ceramics, particulate/ whisker-reinforced ceramics, and continuous fiber-reinforced ceramic composites. It is intended to provide guidance and information to users on the special considerations involved in determining the thermal properties of these ceramic materials. 1.2 Five thermal properties (specific heat capacity, thermal conductivity, thermal diffusivity, thermal expansion, and emittance/emissivity) are presented in terms of their definitions and general test methods. The relationship between thermal properties and the composition, microstructure, and processing of advanced ceramics (monolithic and composite) is briefly outlined, providing guidance on which material and specimen characteristics have to be considered in evaluating the thermal properties of advanced ceramics. Additional sections describe sampling considerations, test specimen preparation, and reporting requirements. 1.3 Current ASTM test methods for thermal properties are tabulated in terms of test method concept, testing range, specimen requirements, standards/reference materials, capabilities, limitations, precision, and special instructions for monolithic and composite ceramics. 1.4 This guide is based on the use of current ASTM standards for thermal properties, where appropriate, and on the development of new test standards, where necessary. It is not the intent of this guide to rigidly specify particular thermal test methods for advanced ceramics. Guidance is provided on how to utilize the most commonly available ASTM thermal test methods, considering their capabilities and limitations. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. See IEEE/ASTM SI 10 . 1.6 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. 1.7 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 The high-temperature capabilities of advanced ceramics are a key performance benefit for many demanding engineering applications. In many of those applications, advanced ceramics will have to perform across a broad temperature range. The thermal expansion, thermal diffusivity/conductivity, specific heat, and emittance/emissivity are crucial engineering factors in integrating ceramic components into aerospace, automotive, and industrial systems. 5.2 This guide is intended to serve as a reference and information source for testing the thermal properties of advanced ceramics, based on an understanding of the relationships between the composition and microstructure of these materials and their thermal properties. 5.3 The use of this guide assists the testing community in correctly applying the ASTM thermal test methods to advanced ceramics to ensure that the thermal test results are properly measured, interpreted, and understood. This guide also assists the user in selecting the appropriate thermal test method to evaluate the particular thermal properties of the advanced ceramic of interest. 5.4 The thermal properties of advanced ceramics are critical data in the development of ceramic components for aerospace, automotive, and industrial applications. In addition, the effect of environmental exposure on thermal properties of the advanced ceramics must also be assessed.