The present study concerns a fully metallic solid-liquid composite Phase Change Material based on an Al–Sn Miscibility Gap Alloy produced by powder metallurgy, including its ball-milling, compression and further sintering heat treatment. The materials obtained by different routes display a narrow melting temperature range at about 230 °C, corresponding to the phase transformation of Sn- or of Sn-rich eutectic. The microstructures obtained by this manufacturing process lead to form-stable PCMs, which can keep their shape and prevent active phase leakage in service conditions. Ball milling of metal powders as mixing technique allowed to obtain a very fine microstructure, resulting in stability of thermal response and improvement of mechanical properties. Among the investigated Al–40Sn mass% samples, the most promising were those compressed at 240 °C followed by sintering at 500 °C.

本研究涉及一种全金属固液复合相变材料，该材料基于粉末冶金生产的Al-Sn混溶间隙合金，包括球磨，压缩和进一步烧结热处理。通过不同途径获得的材料在约230°C处显示出较窄的熔融温度范围，对应于Sn或富Sn共晶的相变。通过这种制造工艺获得的微结构导致形状稳定的PCM，PCM可以保持其形状并防止在使用条件下发生活性相泄漏。金属粉末的球磨作为混合技术可以得到非常精细的微观结构，从而导致热响应的稳定性和机械性能的改善。在调查的Al–40Sn质量％样品中，