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Synthesis of nanocrystalline NiAl by mechanical alloying

✍ Scribed by M.H. Enayati; F. Karimzadeh; S.Z. Anvari

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
803 KB
Volume
200
Category
Article
ISSN
0924-0136

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✦ Synopsis

The nanocrystalline NiAl intermetallic compound was synthesized by mechanical alloying of the elemental powders. The structural changes of powder particles during mechanical alloying were studied by X-ray diffractometery, scanning electron microscopy and microhardness measurements. The mechanical alloying resulted in the gradual formation of nanocrystalline NiAl with a grain size of 20 nm. It was found that NiAl phase develops by continuous diffusive reaction at Ni/Al layers interfaces. The NiAl compound exhibited high microhardness value of about 1035 Hv.

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