Abstract The effect of AlN content on the microstructure and mechanical properties of NiAl/Fe–x AlN (x = 0, 3, 5, 10, 15 wt%) alloys were investigated after mechanical alloying with subsequent vacuum hot-pressing sintering. The results showed that the AlN reinforced NiAl/Fe alloy contained B2-ordered NiAl phase, Fe phase and AlN phase. As the AlN content increased, the density of the material decreased gradually, and the hardness and thermal conductivity increased greatly. NiAl/Fe based alloys with 5 wt% AlN obtained higher compressive strength and Rockwell hardness. When the content of AlN was 15 wt%, the density was 5.42 g/cm3, which was 18.6% lower than that of NiAl/Fe alloy. When the content of AlN was 5 wt%, the hardness reached the maximum value of 59.5 HRC, which was 69.04% higher than that of NiAl/Fe alloy. The thermal conductivity of the material first increased and then decreased with the increasing AlN content. When AlN content was 10 wt%, its thermal conductivity was higher than others at each temperature, and the maximum was 34.75 W/(m·k) at 600 °C in the study.

中文翻译：

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AlN对真空热压烧结NiAl/Fe基合金组织、力学和热物理性能的影响

摘要 在机械合金化和随后的真空热压烧结后，研究了 AlN 含量对 NiAl/Fe-x AlN (x = 0, 3, 5, 10, 15 wt%) 合金组织和力学性能的影响。结果表明，AlN增强NiAl/Fe合金含有B2有序NiAl相、Fe相和AlN相。随着AlN含量的增加，材料的密度逐渐降低，硬度和导热系数大大增加。含 5 wt% AlN 的 NiAl/Fe 基合金获得了更高的抗压强度和洛氏硬度。当AlN含量为15 wt%时，密度为5.42 g/cm3，比NiAl/Fe合金低18.6%。当AlN含量为5wt%时，硬度达到最大值59.5 HRC，比NiAl/Fe合金高69.04%。随着AlN含量的增加，材料的热导率先升高后降低。当 AlN 含量为 10 wt% 时，其热导率在各温度下均高于其他温度，研究中在 600 °C 时最大为 34.75 W/(m·k)。