Abstract In this study, ultrafine-grained Al71Ni14.5Co14.5 quasicrystal alloy was prepared by short-term mechanical alloying and spark plasma sintering process. The properties of the material exhibited a positive temperature dependence during the compression test up to 600 °C, such that both strength and strain enhanced by 61.6 and 75.3%, respectively. In contrast to other quasicrystals, work-hardening was also observed during the test at intermediate temperatures. To move towards prospective materials applicable at elevated temperatures, this anomalous behavior was analyzed by an investigation on the microstructure and fracture surface of the samples using TEM and SEM.

中文翻译：

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通过机械合金化和放电等离子烧结制造的 AlNiCo 多准晶中压缩性能的正温度依赖性

摘要 本研究采用短期机械合金化和放电等离子烧结工艺制备了超细晶Al71Ni14.5Co14.5准晶合金。在高达 600 °C 的压缩试验期间，材料的性能表现出正的温度依赖性，因此强度和应变分别提高了 61.6% 和 75.3%。与其他准晶体相比，在中间温度下的测试过程中也观察到加工硬化。为了向适用于高温的预期材料迈进，通过使用 TEM 和 SEM 对样品的微观结构和断裂表面进行研究，分析了这种异常行为。