PM2K: a flexible program implementing Whole Powder Pattern Modelling

Leoni, Matteo; Confente, T.; Scardi, Paolo

doi:10.1524/zksu.2006.suppl_23.249

Cited by 225 publications

(160 citation statements)

References 4 publications

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“…Data were analysed using the Whole Powder Pattern Modelling (WPPM) method [44] implemented in the PM2K software [45]. The instrumental resolution function was characterised with the NIST SRM 660a (LaB6) standard [46,45]: all peak profiles of the LaB6 phase were simultaneously fitted with symmetrical pseudo-Voigt functions whose width and shape were constrained according to the Caglioti et al formulae [47].…”

Section: Characterisation Techniquesmentioning

confidence: 99%

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

Dodoo‐Arhin

Leoni

Scardi

2012

Molecular Crystals and Liquid Crystals

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Copper oxide (CuO) nanorod-like structures made of spherical nanocrystals were synthesized at moderate temperature (80°C) starting from CuCl 2 •2H 2 O crystals in a water/n-heptane microemulsion stabilised by the nonionic Brij-30 surfactant. Whole Powder Pattern Modelling of the X-ray diffraction pattern shows absence of linear and planar defects with crystalline domains in the range of 4 -8 nm. A linear correlation between the average size of the particles and the quantity of water in the system was observed: all synthesised specimens show a large blue shift of the energy bandgap (up to 2.7 eV versus 1.2 eV of bulk CuO) resulting from quantum confinement effects. The mechanism of growth of the spherical nanoparticles into nanorod-like structures has been elucidated.

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Section: Characterisation Techniquesmentioning

confidence: 99%

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

Dodoo‐Arhin

Leoni

Scardi

2012

Molecular Crystals and Liquid Crystals

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“…Other programs such as e.g. Fullprof (Rodríguez-Carvajal, 1993), Maud (Lutterotti et al, 1999), GSAS (Larson & Von Dreele, 2000), PM2K (Leoni et al, 2006) or MStruct (Materě j et al, 2014) use phenomenological peak functions, e.g. pseudo-Voigt or Pearson VII (Young & Wiles, 1982), with angluar dependence of profile parameters (FWHM, shape parameter and asymmetry) described by polynomial functions.…”

Section: Resultsmentioning

confidence: 99%

Powder diffraction in Bragg–Brentano geometry with straight linear detectors

et al. 2015

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A common way of speeding up powder diffraction measurements is the use of one-or two-dimensional detectors. This usually goes hand in hand with worse resolution and asymmetric peak profiles. In this work the influence of a straight linear detector on the resolution function in the Bragg-Brentano focusing geometry is discussed. Because of the straight nature of most modern detectors geometrical defocusing occurs, which heavily influences the line shape of diffraction lines at low angles. An easy approach to limit the resolutiondegrading effects is presented. The presented algorithm selects an adaptive range of channels of the linear detector at low angles, resulting in increased resolution. At higher angles the whole linear detector is used and the data collection remains fast. Using this algorithm a well behaved resolution function is obtained in the full angular range, whereas using the full linear detector the resolution function varies within one pattern, which hinders line-shape and Rietveld analysis.

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“…Microstructural data was collected CuKα radiation using a standard Bragg-Brentano geometry with a high-resolution Rigaku PMG-VH diffractometer while data was analyzed following the WPPM approach using the PM2K software [8].…”

Section: Methodsmentioning

confidence: 99%

Influence of Tempering Conditions on Shot-Peened Tool Steel Components In-Depth Residual Stress Profiles

Cecchin

Kobza

Cazzolli

et al. 2014

AMR

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Abstract. Tool steel (X155CrVMo121KU in the following UK15) samples were analyzed to determine the in-depth residual stress profile and to study modifications in the microstructure, induced by a shot-peening treatment. The influence of different tempering temperatures was studied. Residual stress and dislocation density profiles were measured using standard laboratory X-ray diffraction (XRD) residual stress analysis with progressive chemical layer removal. Dislocation density profiles where obtained using a Whole Powder Pattern Modeling (WPPM) procedure.

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PM2K: a flexible program implementing Whole Powder Pattern Modelling

Cited by 225 publications

References 4 publications

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

Powder diffraction in Bragg–Brentano geometry with straight linear detectors

Influence of Tempering Conditions on Shot-Peened Tool Steel Components In-Depth Residual Stress Profiles

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