将负膨胀特性的钨酸锆加入到铝合金中可赋予铝合金超低膨胀特性，但是其相组成和相变特性将影响ZrW2O8/Al复合材料的热膨胀性能。本项目在分析钨酸锆化学稳定性的基础上，采用压力浸渗方法制备ZrW2O8/Al复合材料；对复合材料残余应力进行分析，结合原位XRD、原位拉曼分析和第一性原理计算，阐述应力、温度等因素对复合材料中钨酸锆相变行为的影响，研究受铝基体约束的钨酸锆颗粒的相变行为、相变产物和相变机理；研究不同热处理状态下复合材料的热膨胀和热循环性能，结合复合材料的相组成和显微组织分析，揭示复合材料热膨胀性能与钨酸锆结构变化的相关性；同时，建立基于复合材料实际组织的三维模型，进行热膨胀性能预测和热循环过程中尺寸变化的模拟计算。通过项目的研究，揭示钨酸锆的约束相变特性及ZrW2O8/Al复合材料的热膨胀调控机理，为ZrW2O8/Al复合材料的设计理论、热处理原理和性能优化提供科学依据和理论支持。

The adding of Negative Thermal Expansion (NTE) ZrW2O8 particles into Al alloys can create aluminum matrix composites with very low thermal expansion, but the phase constitution and phase transformation characteristics of ZrW2O8 particles will influence the thermal expansion of ZrW2O8/Al composites. Based on the decomposition stability analysis of ZrW2O8, the ZrW2O8/Al composites will be fabricated by pressure infiltration process. The residual stress in the composites will be analyzed. With the combination of in-situ XRD, in-situ Raman analysis and first-principle calculations, the effect of stress, temperature on the phase transformation of ZrW2O8 will be discussed, then to illustrate the constraint phase transformation behavior, products and mechanisms of ZrW2O8. The thermal expansion and thermal cycling properties will be investigated in ZrW2O8/Al composites after heat treatments. Combined with the phase and microstructure analysis, it is aimed to reveal the correlation between thermal expansion and phase constitution. The three dimensional image-based models, representing the actural microstructure features of ZrW2O8/Al composites, will also be established to predict the thermal expansion property and simulate the dimensional change during thermal cycling. It is expected to illustrate the constraint phase transformation characteristics of ZrW2O8 and thermal expansion tailoring mechanisms of ZrW2O8/Al composites, and then provide scientific foundation and theoretical supports for the design theories, heat treatment principles, and performance optimization of ZrW2O8/Al composites.