dc.contributor.author | Tsipas, Sophia Alexandra![]() |
dc.contributor.author | Gordo Odériz, Elena![]() |
dc.date.accessioned | 2016-06-29T10:44:35Z |
dc.date.available | 2018-06-23T22:00:05Z |
dc.date.issued | 2016 |
dc.identifier.bibliographicCitation | Materials Characterization [In press] |
dc.identifier.issn | 1044-5803 |
dc.identifier.uri | http://hdl.handle.net/10016/23254 |
dc.description | El artículo está disponible online en la web del editor (Elsevier) desde el 23 de junio de 2016. |
dc.description.abstract | Wear and high temperature oxidation resistance of some titanium-based alloys needs to be enhanced, and this can beeffectively accomplished by surface treatment. Molybdenizing is a surface treatment where molybdenum is introducedinto the surface of titanium alloys causing the formation of wear-resistant surface layers containing molybdenum, whilealuminizing of titanium-based alloys has been reported to improve their high temperature oxidation properties. Whereaspack cementation and other surface modification methods have been used for molybdenizing or aluminizing of wroughtand/or cast pure titanium and titanium alloys, such surface treatments have not been reported on titanium alloys producedby powder metallurgy (PM). Also a critical understanding of the process parameters for simultaneous one stepmolybdeno-aluminizing of titanium alloys by pack cementation and the predominant mechanism for this process havenot been reported. The current research work describes the surface modification of titanium and Ti-6Al-4V prepared byPM by molybdeno-aluminizing and analyzes thermodynamic aspects of the deposition process. Similar coatings are alsodeposited to wrought Ti-6Al-4V and compared. Characterization of the coatings was carried out using scanning electronmicroscopy and x-ray diffraction. For both titanium and Ti-6Al-4V, the use of a powder pack containing ammoniumchloride as activator leads to the deposition of molybdenum and aluminium into the surface but also introduces nitrogencausing the formation of a thin titanium nitride layer. In addition, various titanium aluminides and mixed titanium aluminiumnitrides are formed. The appropriate conditions for molybdeno-aluminizing as well as the phases expected to beformed were successfully determined by thermodynamic equilibrium calculations. |
dc.description.sponsorship | Regional Government of Madridthrough the project S2013/MIT-2862 (MULTIMAT-CHALLENGE-CM), and by the Ministry of Economy and Competitiveness of Spain through the project MAT2012/38650-C02-01 |
dc.format.extent | 14 |
dc.format.mimetype | application/pdf |
dc.language.iso | eng |
dc.publisher | Elsevier |
dc.rights | Elsevier |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject.other | Ti-6Al-4V |
dc.subject.other | Molybdenizing |
dc.subject.other | Powder metallurgy |
dc.subject.other | Thermodynamic calculations |
dc.subject.other | Pack cementation |
dc.title | Molybdeno-Aluminizing of Powder Metallurgy and Wrought Ti and Ti-6Al-4Valloys by Pack Cementation process |
dc.type | article |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.matchar.2016.06.028 |
dc.subject.eciencia | Materiales |
dc.identifier.doi | 10.1016/j.matchar.2016.06.028 |
dc.rights.accessRights | openAccess |
dc.relation.projectID | Comunidad de Madrid. S2013/MIT-2862 |
dc.relation.projectID | Gobierno de España. MAT2012-38650-C02-01 |
dc.type.version | acceptedVersion |
dc.identifier.publicationtitle | Materials characterization |
dc.identifier.uxxi | AR/0000017999 |
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