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Firenze, Italy

Salvemini F.,CNR Institute for Complex Systems | Salvemini F.,Australian Nuclear Science and Technology Organisation | Grazzi F.,CNR Institute for Complex Systems | Kardjilov N.,Helmholtz Center Berlin | And 3 more authors.
Analytical Methods | Year: 2015

Computed laminography (CL) has been developed as a method to complement computed tomography for three-dimensional imaging of laterally extended specimens. Originally applied for medical purposes, more recently CL has been used as a non-destructive method, not only in the materials science research, but also with rising interest in artwork investigations. Here, we report the implementation of computed laminography with polychromatic and monochromatic neutron radiation carried out on five historical and archaeological metal artefacts pertaining to different periods and technological contexts. The measurements were performed at the CONRAD II neutron imaging facility at the BERII research reactor of Helmholtz-Zentrum Berlin (HZB). © 2014 The Royal Society of Chemistry.

Fedrigo A.,National Research Council Italy | Grazzi F.,National Research Council Italy | Williams A.,Wallace Collection | Scherillo A.,National Research Council Italy | And 2 more authors.
Journal of Analytical Atomic Spectrometry | Year: 2013

In this work we present an extensive time of flight neutron diffraction (ToF-ND) study on some Japanese armour components. The experiments were carried out at the INES diffractometer at ISIS, the pulsed neutron source in the UK. In particular, we have studied seven Japanese helmets (kabuto) made between the 16th and 17th century. By means of this non-invasive approach we have been able to determine quantitatively the phase composition and the microstructural properties of these artefacts. The samples belong to different periods and different levels of quality. The observed differences were quantified in terms of the accuracy and amount of their working. A quantitative determination of their phases and of the thermo-mechanical treatments has been obtained for all investigated samples, confirming that the use of ToF-ND represents one of the most suitable non-destructive approaches for the characterization of metal archaeological artefacts. © 2013 The Royal Society of Chemistry.

Pietropaolo A.,University of Rome Tor Vergata | Festa G.,University of Rome Tor Vergata | Grazzi F.,CNR Institute for Complex Systems | Barzagli E.,CNR Institute for Complex Systems | And 3 more authors.
EPL | Year: 2011

Here we present a new concept for a time-of-flight neutron scattering instrument allowing for simultaneous application of three different techniques: time-of-flight neutron diffraction, neutron resonance capture analysis and Bragg edge transmission analysis. The instrument can provide average resolution neutron radiography too. The potential of the proposed concept was explored by implementing the necessary equipment on INES (Italian Neutron Experimental Station) at the ISIS spallation neutron source (UK). The results obtained show the effectiveness of the proposed instrument to acquire relevant quantitative information in a non-invasive way on a historical metallurgical sample, namely a Japanese hand guard (tsuba). The aforementioned neutron techniques simultaneously exploited the extended neutron energy range available from 10 meV to 1 keV. This allowed a fully satisfactory characterization of the sample in terms of metal components and their combination in different phases, and forging and assembling methods. © 2011 Europhysics Letters Association.

Salvemini F.,CNR Institute for Complex Systems | Grazzi F.,CNR Institute for Complex Systems | Peetermans S.,Paul Scherrer Institute | Civita F.,CNR Institute for Complex Systems | And 4 more authors.
Journal of Analytical Atomic Spectrometry | Year: 2012

Japanese blades are culturally interesting objects both from the stylistic point of view and because of their fantastic performance. In this work, we present new results, using a non-invasive approach, concerning these peculiar artefacts. Five Japanese swords pertaining to Koto (987-1596) and Shinto (1596-1781) periods have been analysed through white beam and energy resolved neutron-imaging techniques. The experiments have been performed at the ICON beam line, operating at the spallation neutron source SINQ, Paul Scherrer Institut in Switzerland. The reconstruction of projection data into neutron tomographic slices or volumes allowed us to identify some peculiar characteristics, related to the forging methods that were used by the different schools and traditions in Japan. © 2012 The Royal Society of Chemistry.

Grazzi F.,National Research Council Italy | Bartoli L.,National Research Council Italy | Barzagli E.,National Research Council Italy | Civita F.,Museo Stibbert | And 3 more authors.
Metallurgia Italiana | Year: 2011

Two Japanese long blades of the Ancient Sword (Koto) age have been analysed through time of flight neutron diffraction. This technique allows the determination of several microstructural properties on different size gauge volumes. The results of the experiment provided a quantitative multiphase characterization of the steel composition of the blades and the determination of peculiar properties of the material, such as the texture, the strain level and the grain size of the crystallites.

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