Phase stability of hcp-Mn-Al (ε-phase) was found to improve by carbon addition. Mn_xAl_100-xC_y (50 ≤ x ≤ 63 and 0 ≤ y ≤ 2) samples were prepared by reactive sintering method. The annealing and quenching of the samples were carried out for 700 to 1100°C. The precipitation of ε-phase was observed at y = 2 even the annealing temperature of 800°C, which was β + γ₂ region in the Al–Mn phase diagram. It is suggested that the carbon addition enhanced the phase stability of ε-phase and contributed for the stable synthesis of τ-phase by ε−τ transformation.

中文翻译：

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碳添加对hcp-Mn-Al相稳定性的影响

发现hcp-Mn-Al（ε相）的相稳定性通过添加碳得以改善。锰_X的Al _{100- X} Ç _ý（50≤  X  ≤63和0≤  ÿ  ≤2）通过反应烧结方法制备的样品。样品的退火和淬火在700至1100℃下进行。观察到ε相的析出在ý  = 2甚至800℃，这是β+γ退火温度₂在Al-Mn系相图区域。这表明碳的添加增强了ε相的相稳定性，并有助于通过ε-τ转化稳定合成τ相。