1991•Journal of the Japan Society of Powder and Powder MetallurgyOpen access

Sinterability of intermetallic compound NiAl powder and its mechanical properties.

Katsuhiro Nishiyama, Yuichi Yoshida, Masashi Mohri, Noburu Eguchi, Sokichi Umekawa, Shuji Shite

Abstract

Sinterability of NiAl powder with the composition of Ni-49.4at%Al prepared by a self-propagating high-temperature synthesis(SHS) method were examined in a hot-pressing process. The sintered compacts with density of 97-99% were obtained by a hot-pressing at 1200 to 1400°C for 0.5hr under a pressure of 60MPa in vacuum. The bending strength of sintered NiAl hot-pressed at 1200°C reaches a maximum value of 1080MPa. The room-temperature strength of NiAl is strongly dependent on grain sizes.

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Key concepts: Nial, Materials science, Intermetallic, Flexural strength, Hot pressing, Metallurgy, Die (integrated circuit), Composite material