The novel theoretical models for the temperature dependence of the contact mechanical properties of the particulate composites in Hertzian contact are proposed in this paper, based on an assumption of the temperature-independent constant energy storage capacity for a specific brittle particulate composite, associating with the material yielding, and the theory of Hertzian contact. The yield stress, critical loads for the onset of the brittle and quasi-plastic damage modes, indentation strength, and the more commonly used fracture strength of the composites are expressed in terms of the basic material properties—the temperature-dependent Young’s modulus and specific heat capacity, and the critical flaw size. The models enable the priori and quantitative predictions of the contact damage behavior of the composites during the whole process of the Hertzian contact. The models are validated by comparing against the experimental measurements of the temperature-dependent contact mechanical properties of the particulate-reinforced ultra-high temperature ceramic matrix composites in the temperature range of 25 ∼ 800 °C, which were found probably to be the only reported experimental studies of the particulate composites. The temperature dependence of the contact damage behavior of the composites is revealed to be mainly governed by the temperature-dependent Young’s modulus and specific heat capacity, and the change of the flaw size above a certain temperature point. The models provide additional adequate methods for the determination of the nature and the underlying physical control mechanisms of the damage behavior of the composites at high temperatures.

基于特定脆性颗粒复合材料与温度相关的，与温度无关的恒定储能能力的假设，本文提出了一种新型的理论模型，该模型与赫兹接触中的颗粒复合材料的接触机械性能具有温度依赖性。屈服以及赫兹接触理论。复合材料的屈服应力，脆性和准塑性破坏模式的临界载荷，压痕强度以及更常用的断裂强度均用基本材料特性表示，即温度相关的杨氏模量和比值。热容量和关键缺陷尺寸。该模型能够在赫兹接触的整个过程中对复合材料的接触破坏行为进行先验和定量预测。通过与在25到800°C的温度范围内颗粒增强的超高温陶瓷基复合材料的温度相关接触机械性能的实验测量值进行比较，验证了模型的有效性，这可能是唯一报道的颗粒复合材料的实验研究。结果表明，复合材料接触损伤行为的温度依赖性主要取决于温度依赖性的杨氏模量和比热容，以及特定温度点以上缺陷尺寸的变化。