Thanks to their high energy density and thermal conductivity, metallic Phase Change Materials (mPCM) have shown great potential to improve the performance of thermal energy storage systems. However, the commercial application of mPCM is still limited due to their corrosion behavior with conventional container materials. This work first addresses on a fundamental level, whether carbon‐based composite‐ceramics are suitable for corrosion critical components in a thermal storage system. The compatibility between the mPCM AlSi₁₂ and the Liquid Silicon Infiltration (LSI)‐based carbon fiber reinforced silicon carbide (C/C‐SiC) composite is then investigated via contact angle measurements, microstructure analysis, and mechanical testing after exposure. The results reveal that the C/C‐SiC composite maintains its mechanical properties and microstructure after exposure in the strongly corrosive mPCM. Based on these results, efforts were made to design and manufacture a container out of C/C‐SiC for the housing of mPCM in vehicle application. The stability of the component filled with mPCM was proven nondestructively via computer tomography (CT). Successful thermal input‐ and output as well as thermal storage ability were demonstrated using a system calorimeter under conditions similar to the application. The investigated C/C‐SiC composite has significant application potential as a structural material for thermal energy storage systems with mPCM.

中文翻译：

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用于金属相变材料的C / C-SiC组件

由于其高能量密度和导热率，金属相变材料（mPCM）在改善热能存储系统的性能方面显示出巨大潜力。但是，由于mPCM对常规容器材料的腐蚀行为，其商业应用仍然受到限制。这项工作首先从根本上解决碳基复合陶瓷是否适合储热系统中腐蚀关键的部件的问题。mPCM AlSi ₁₂之间的兼容性然后，通过接触角测量，微观结构分析和暴露后的机械测试，研究了基于液态硅渗透（LSI）的碳纤维增强碳化硅（C / C-SiC）复合材料。结果表明，C / C-SiC复合材料在强腐蚀性mPCM中暴露后仍保持其机械性能和微观结构。基于这些结果，我们努力设计和制造一种用C / C-SiC制成的容器，用于车辆应用中的mPCM外壳。通过计算机断层扫描（CT）无损地证明了填充有mPCM的组件的稳定性。在与应用类似的条件下，使用系统热量计证明了成功的热量输入和输出以及热量存储能力。