Synthesis of nanocrystalline NiAl by mechanical alloying

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• 作者：M.H. Enayati ; F. Karimzadeh ; S.Z. Anvari
• 关键词：NiAl ; Intermetallics ; Nanostructured materials ; Mechanical alloying
• 刊名：Journal of Materials Processing Technology
• 出版年：2008
• 期刊代码：102_09240136
• 类别：et
• 出版时间：8 May 2008
• 卷：200
• 期：1-3
• 页码：312-315
• 文件大小：802 K

摘要

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.