STUDIES OF CRYSTALLITE SIZE AND LATTICE STRAIN IN AL-AL2O3 POWDERS PRODUCED BY HIGH-ENERGY MECHANICAL MILLING

Mahmoud, A E; Wasly, H S; Doheim, M A

doi:10.21608/jesaun.2014.115136

STUDIES OF CRYSTALLITE SIZE AND LATTICE STRAIN IN AL-AL2O3 POWDERS PRODUCED BY HIGH-ENERGY MECHANICAL MILLING

Document Type : Research Paper

Authors

¹ Mining and Metallurgical Eng. Depart, Faculty of Engineering, Assiut University, Assiut, Egypt

² Mining and Metallurgical Eng. Depart, Faculty of Engineering, Al-Azhar University, Qena, Egypt

10.21608/jesaun.2014.115136

Abstract

In the present study mechanical milling used to form nanocrystalline structure in Al-Al2O3 powders. The microstructure of the milled powders was investigated by X-r ay diffraction (XRD) analysis. It was found that the XRD peaks showed a significant broadening, which was related to grain refinement and lattice distortions. X-ray patterns were analyzed using Williamson–Hall treatment to determine the crystallite size and the lattice strain. nanocrystalline powders have been synthesized with microstructure showing a higher lattice strain and an evolution of the finest particles. Microhardness measurements and compression tests were performed to characterize the composite materials.

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