diffraction to characterise archaeological bronzcs. As

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Threc sets of standardised binary and temary alloy specimens were ernployed in the rneasurements. The first set included two groups of 12 binary bronzes with ...
MlCROSTRUCTURAL BRONZE CHARACTERJSATION BY TIME OF FLIGHT NEUTR ON DIFFRACTION $. Siano 1, L. Bartoli 1, M. Zoppi 1, W. Kockelmann 2•3, M. Daymond 3, J.A. Dann3, 4 G.L. Garagnaru , M . Miccio5 1) 2) 3) 4) 5)

Istituto di Fisica Applicata-CNR, Firenze, Italy, S. [email protected].:it Mìneralogisch-Petrologisches Institut, Bonn University, Bonn, Gcrmany Rutherforcll Appleton Laboratory, ISIS Neutron Facility, Chilton, England Dipartimento di Ingegneria, Università di Ferrara, Italy Soprlutendcnza per i Beni Archeologici della Toscana

ABSTRACT In the present work we report further insights on the application of time of flight ncutron diffraction to characterise archaeological bronzcs. As development of a preliminary study, a systematic measurement campaign was performed on standardised specimens and archacological artefacts. The formers were used to derive refcrcnce bchaviours associated with different alloy compositions and working treatments in order to study complex originai objects. In particular, the dependence of the lattice parameter on tin content in homogenised binary alloys, tbe typical peak . shapes associated with raw castings, thennally and mechanically treated specirnens, as well as the identification of the of the eutectoid along with multiphase anaJyses involving lead, were extensively investigated on standardised specimens. This whole infonnation was then exploitcd to characterisc various archacological artefacts by suitable experimental and analytical protocols. The achicved results demonstrate a true perspcctivc for nculron