a comparison between the warren-averbach method and alternate methods for x-ray diffraction microstructure analysis of polycrystalline specimens

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ID: 157744
2001
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Abstract
The fundamental parameters approach is used to simulate the instrument contribution to the X-Ray diffraction profile. This procedure eliminates the need to experimentally prepare a reference sample of the studied crystalline material when using the Warren-Averbach method to investigate microstrutural parameters. The Warren-Averbach method is also compared to the Balzar and Enzo methods, two other popular methods of size-strain analysis. The analysis was carried out using bohmite powder having two different nominal average crystallite sizes, 80 Å and 200 Å. A 50%-50% mixture of these materials was used as a third sample. The proposed simulation procedure provides good results and is much faster to implement than the usual procedure that includes the preparation of a reference. For larger crystallite sizes, the results calculated from the Warren-Averbach method for the volume-weighted average crystallite size differs significantly from the ones obtained from the Balzar and Enzo methods. The limitations of the Balzar and Enzo methods are also discussed.
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Authors ;Bojan Marinkovic;Roberto Ribeiro de Avillez;Alvaro Saavedra;Fernando Cosme Rizzo Assunção
Journal Majalah Ilmiah Teknologi Elektro
Year 2001
DOI
10.1590/S1516-14392001000200005
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000200005
Keywords
X-ray diffraction mechanics of materials bohmitematerials of engineering and construction

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