1,159 research outputs found
Gli esordi dell'epica a Roma
No full textGli Annales di Ennio rappresentano una tappa importante nel ‘farsi’ della lingua poetica, non solo epica, qui analizzata nelle sue caratteristiche principali
Il Cippo del Foro: Nuove letture e prospettive euristiche
No full textThe Cippus of the Forum is reviewed in a new light thanks to the results of laser scanning commissioned by the Soprintendenza di Roma. A synergistic approach to the inscription, with the use of autopsies of the original and reproductions and digital image analysis, has made it possible to discard some old hypotheses and suggest new heuristic paths. An Appendix on Latin inscriptions from the seventh and sixth centuries BCE completes the work
Numérique et lecture de textes épigraphiques altérés
No full textL’acquisizione digitale dell’iscrizione sul cippo del Foro si è svolta nell’ambito del progetto di tutela e valorizzazione del Foro Romano e Palatino avviato dalla Soprintendenza Speciale per il
Colosseo, il Museo Nazionale Romano e l’Area Archeologica di Roma. L’analisi sul cippo è stata effettuata con FARO CAM2 composto da un braccio di misura da 2.9m dotato di testa a scansione laser V6HD, che permette di scansionare in un secondo 460mila punti dell’iscrizione con altissima
risoluzione e che è composto di un braccio meccanico che si muove intorno al supporto rilevando tutti i dati al centesimo di millimetro. I risultati delle analisi eseguite al laser scanner sono visibili dalle immagini ad alta risoluzione elaborate con colori che evidenziano le profondità millimetriche dell’incisione come si può vedere dalle figure. Lo studio delle immagini e le tre autopsie condotte hanno consentito una nuova edizione che si presenta ‘pulita’ dai dubbi del passato per i punti critici con letture divergenti dai primi lavori in poi e dovute a diversi fattori: il ricorso alle zincotipie e al calco Boni e al disegno Comparetti, la difficoltà di una autopsia in un luogo disagevole e chiuso per
lungo tempo e una interpretazione a priori. È il caso di una lettura D dopo SOR- (= sordes) e di r. 4 a Faccia B. Oltre a questi, le caratteristiche della pietra, il tufo lionato del Campidoglio, facilmente deteriorabile col trascorrere del tempo e con numerosi buchi, hanno impedito la riconoscibilità di un modulo divisorio coerente e presente in tutte le facce
The Lapis satricanus as evidence of an italic writing context in the Latium vetus?
No full textSabine traditions in the Lapis Satricanus? We will propose a possible cultural “sabine” individualization of the Lapis Satricanus, that expresses itself on a level of language and handwriting. The Latin alphabet actually gives evidence of some peculiarities that recall possible extra-Latin parallels. But the “cultural” contents (including obviously the linguistic features) are even more meaningful: these seem to show a coexistence of traditions in Rome of “not Roman type”
The digital edition of the archaic latin inscriptions (7th-5th century B.C.)
No full textThe ILA project consist in the digital edition of the archaic Latin inscriptions (7th -5th century B.C.) according to the EpiDoc guidelines. The edition is the result of an autoptical examination of the epigraphic documents and of the text-bearing objects, together with the analysis of previuos studies.In the particular case of the Forum inscription, this led to new discoveries and confirmed old hypotheses. Each text will be presented in an epigraphic chart, enriched by photos and illustrations
Giulia Veronica Varisco
No full textThe headword explains the biography and the contribution of the author Giulia Varisco to the children's literatur
Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure
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Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure
by Giulia Di Iorio,Laura Paglia *ORCID,Giulia PedrizzettiORCID,Virgilio GenovaORCID,Francesco MarraORCID,Cecilia BartuliORCID andGiovanni PulciORCID
INSTM Reference Laboratory for Materials and Surface Engineering, Sapienza University of Rome, Eudossiana 18, 00184 Rome, Italy
*
Author to whom correspondence should be addressed.
Coatings 2023, 13(9), 1602; https://doi.org/10.3390/coatings13091602
Original submission received: 10 August 2023 / Revised: 31 August 2023 / Accepted: 11 September 2023 / Published: 13 September 2023
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Abstract
SiC/SiC ceramic matrix composites (SiCf/SiC CMCs) are regarded as the new materials for the hot-section components of aircraft gas turbine engines, since they have one-third of the density of metallic superalloys, a higher temperature capability, good mechanical strength, and excellent thermal shock resistance. However, high-temperature water-vapor-rich combustion gases can induce severe surface recession phenomena in SiC/SiC leading to component failure. For this reason, it is necessary to design protective coatings, i.e., environmental barrier coatings (EBCs), able to protect the SiC/SiC surface in combustion environments. In the present work, ytterbium monosilicate (Yb2SiO5), stable when exposed to water vapor at high temperatures, and ytterbium disilicate (Yb2Si2O7), characterized by a thermal expansion coefficient closer to that of the substrate, were selected for a multilayer EBC system. EBCs were processed using the atmospheric plasma spray (APS) technique. A set of deposition parameters were tested, varying the power of the torch, and the composition and microstructure of the deposited coatings were studied in terms of porosity, crack density, and post-deposition phase retention by performing SEM, EDS, and XRD analysis. The results allow for the definition of the influence of deposition parameters on the final properties of multilayer EBC coatings
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