Eutectic High Entropy Alloys
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摘要: 共晶合金是工业上广泛应用的一类铸造合金,具有优异的充型能力、机械性能、组织均匀性以及稳定性等。统计发现,大约70%的传统二元合金中存在着共晶转变,所形成的共晶合金大多性能较差,这主要受限于其固定的共晶点、相体积分数以及有限的相组成。相较于传统共晶合金,共晶高熵合金含有更多的组成元素,同时共晶成分由一个点扩展为一定的成分区间,因而力学性能、物理性能以及化学性能具有更大的调控范围,具有更广阔的应用前景。
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图 3 典型共晶材料及应用[2]
图 4 将Ni–Cr二元共晶扩充至多组元共晶高熵合金的示意图[1]
图 6 超细晶异质AlCoCrFeNi2.1共晶高熵合金组织图:(a)扫描组织照片;(b)背散射电子衍射图;(c)扫描透射显微照片;(d)图6(c)中蓝色方框区域的显微组织示意图[5]
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