Search results for " TECNOLOGIE"
showing 10 items of 1308 documents
Mechanical and microstructural characterization of titanium gr.5 parts produced by different manufacturing routes
2022
Abstract In recent years, the aircraft industry has shifted its preference for metal parts to titanium and its alloys, such as the high-strength Titanium Grade5 alloy. Because of Titanium Grade 5 limited formability at ambient temperature, forming operations on this material require high temperatures. In these conditions, a peculiar microstructure evolves as a result of the heating and deformation cycles, which has a significant impact on formability and product quality. On the other hand, additive manufacturing technologies, as selective laser melting and electron beam melting, are increasingly being used and are replacing more traditional approaches such as machining and forging. Fundamen…
Selective Laser Melting of Ti6Al4V: Effects of Heat Accumulation Phenomena Due to Building Orientation
2022
Titanium alloy Ti6Al4V is one of the most utilized alloys in the field of additive manufacturing due to the excellent combination of mechanical properties, density and good corrosion behavior. These characteristics make the use of this material particularly attractive for additively manufacturing components with complex geometry in sectors such as aeronautics and biomedical. Selective Laser Melting (SLM), by which a component is fabricated by selectively melting of stacked layers of powder using a laser beam, is the one of most promising additive manufacturing technologies for Ti6Al4V alloy. Although this technique offers numerous advantages, it has some critical issues related to the high …
TiO2 Photocatalytic glucose conversion to H2 and high value chemicals
2015
In this work it is reported the conversion of glucose in aqueous dispersion of various TiO2 based photocatalysts. Aerobic and anaerobic conditions were used to study the distribution of the products both in the liquid (arabinose, gluconic acid, fructose and formic acid) and gas (H2 and CO2) phases. Commercial and home prepared bare and Pt-supported TiO2 samples were used as the photocatalysts.
Selective Heterogeneous Photocatalysis by TiO2 for Green Innovative Organic Syntheses: Achievements and Challenges
2009
Photocatalytic membranes based on TiO2 catalysts and fluorinated polymers for CO2 conversion
2015
In this work, prepared TiO2–Nafion™-based membranes were used in a photocatalytic membrane reactor, operated in continuous mode, for converting CO2 to methanol.
Preparation of Sm-loaded brookite nanoparticles and thin films
2010
Sintesi di TiO2 anatasio in presenza di HF: studio delle proprietà strutturali e fotocatalitiche
2016
In questo lavoro viene riportata la sintesi di TiO2 anatasio in presenza di soluzioni contenenti quantità diverse di HF allo scopo di ottenere campioni con proprietà strutturali diverse e la valutazione dell’attività fotocatalitica in reazioni liquido-solido e gas-solido.
Preparation, thermal analysis and photoactivity of TiO2 samples
2012
Sintesi di Piperonale tramite fotocatalisi eterogenea in condizioni green
2013
Addressing the photocatalytic mechanism through TiO2 surface engineering
2018
Addressing the photocatalytic mechanism through TiO2 surface engineering