Abstract Al alloys, despite their excellent strength-to-weight ratio, cannot be used at elevated temperatures because of microstructural instability owing to grain growth and precipitate coarsening, thus, leading to a drastic loss in their strength. In this work, we have attempted to address the issue of grain growth by introducing in-situ formed polymer derived ceramics in an Al-Mg alloy. A stable grain structure with minimal loss in hardness when exposed to 450°C and 550°C for 1 hour was obtained due to the particle pinning of the grain boundaries by the Zener mechanism.

中文翻译：

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赋予铝镁合金高温晶粒稳定性

摘要 尽管铝合金具有优异的强度重量比，但由于晶粒长大和析出粗化导致微观结构不稳定，因此不能在高温下使用，从而导致其强度急剧下降。在这项工作中，我们试图通过在铝镁合金中引入原位形成的聚合物衍生陶瓷来解决晶粒生长的问题。由于齐纳机制对晶界的粒子钉扎，当暴露于 450°C 和 550°C 1 小时时，获得了稳定的晶粒结构，硬度损失最小。