Comparison of grain size distributions obtained by XRD and TEM in milled FCC powders

Guerrero-Paz, J; Jaramillo-Vigueras, D.

doi:10.1016/s0965-9773(99)00410-9

Cited by 17 publications

(8 citation statements)

References 7 publications

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“…For this reason the grain size cannot be calculated simply by using the Scherrer equation; instead a more elaborated method considering the combined effects of grain size and microstrain has to be employed, as pointed out by Cullity and Stock [25]. Among the methods more currently used are the Williamson-Hall and Warren-Averbach methods [26][27][28][29][30]. The latter was selected this paper.…”

Section: Effect Of the Ball-to-powder Ratio (Bpr)mentioning

confidence: 99%

Supersaturated Cu–Li solid solutions produced by mechanical alloying

Rojas

Peñaloza

Wörner

et al. 2006

Journal of Alloys and Compounds

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Section: Effect Of the Ball-to-powder Ratio (Bpr)mentioning

confidence: 99%

Supersaturated Cu–Li solid solutions produced by mechanical alloying

Rojas

Peñaloza

Wörner

et al. 2006

Journal of Alloys and Compounds

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“…For this purpose, determination of grain size is of great importance. Transmission electron microscopy (TEM) investigation, that is based on direct observations and counting of the grains [11], provides grain size and grain size distribution, which is closer to the reality. However, due to the ease of X-ray diffraction technique, this method has been used extensively to determine the size of the coherent domains in nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Phase Identification and Size Evaluation of Mechanically Alloyed Cu-Mg-Ni Powders

Kursun¹,

Göğebakan²,

Khoshkhoo³

et al. 2017

Nanostructured Materials - Fabrication to Applications

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Ternary mixture of Cu, Mg, and Ni with the nominal composition of nanocrystalline Cu 50 Mg 25 Ni 25 (in at.%) was milled for 25 hours. Analysis of an X-ray diffraction pattern (XRD) and transmission electron microscopy (TEM) was used to characterize the chemical phases and microstructure of the final product, which is shown to consist of ternary alloy of Cu-Mg-Ni with FCC structure along with small amounts of FCC MgO and Mg 0.85 Cu 0.15 . The good agreement between the size values obtained by XRD and TEM is attributed to the formation of defect-free grains with no substructure during ball milling. Dynamic recrystallization may be a possible mechanism for the emergence of such small grains (<20 nm). The particle size distribution and morphological changes of Cu-Mg-Ni powders were also analyzed by scanning electron microscopy (SEM). According to the SEM results, the particle size of the powders decreased with increasing milling time. Lattice parameter of the Cu-Mg-Ni ternary FCC alloy formed during mechanical alloying increased with increase in milling time from 3.61 to 3.65 Å after 20 hours milling.

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“…The most problematic issue is the determination of grain size and grain size distribution [4,5]. Size and strain analysis based on X-ray diffraction (XRD) is the most common method for the evaluation of the coherently scattering domain size in nanocrystalline materials [4][5][6][7][8]. The method is an indirect approach and is based on the broadening of the X-ray reflections [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…The method is an indirect approach and is based on the broadening of the X-ray reflections [8,9]. On the other hand, grain size determination by TEM is based on the direct observation of the microstructure [4]. As a result, a rather large discrepancy is generally observed between the grain size observed by XRD and TEM [5].…”

Section: Introductionmentioning

confidence: 99%