Authors: Haider T Naeem Kahtan S Mohammad Azmi Rahmat
Publish Date: 2014/12/04
Volume: 58, Issue: 7-8, Pages: 615-621
Abstract
In this study nanocrystalline Al–Ni intermetallic compounds were synthesized by mechanical alloying MA of elemental powders In all MA runs the balltopowder weight ratio was 101 the rotation speed was 350 rpm and the milling time ranged from 4 h to 12 h The phase evolution and microstructural changes of the powders during MA were investigated by xray diffraction XRD scanning electron microscopy and energydispersive xray spectroscopy The crystallite sizes of the milled powders were estimated based on the broadening of the XRD peaks using the Williamson–Hall formula Results showed that an optimum MA time of 12 h resulted in the formation of an Al–Ni intermetallic phase with a crystallite size of 40 nm
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