Molybdeno-Aluminizing of Powder Metallurgy and Wrought Ti and Ti-6Al-4Valloys by Pack Cementation process

Tsipas, Sophia Alexandra; Gordo Odériz, Elena

Publication:
Molybdeno-Aluminizing of Powder Metallurgy and Wrought Ti and Ti-6Al-4Valloys by Pack Cementation process

dc.affiliation.dpto	UC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química	es
dc.affiliation.grupoinv	UC3M. Grupo de Investigación: Tecnología de Polvos	es
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.description	El artículo está disponible online en la web del editor (Elsevier) desde el 23 de junio de 2016.	es
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.	en
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	en
dc.format.extent	14
dc.format.mimetype	application/pdf
dc.identifier.bibliographicCitation	Materials Characterization [In press]	en
dc.identifier.doi	10.1016/j.matchar.2016.06.028
dc.identifier.issn	1044-5803
dc.identifier.publicationtitle	Materials characterization	en
dc.identifier.uri	https://hdl.handle.net/10016/23254
dc.identifier.uxxi	AR/0000017999
dc.language.iso	eng
dc.publisher	Elsevier	en
dc.relation.projectID	Comunidad de Madrid. S2013/MIT-2862	es
dc.relation.projectID	Gobierno de España. MAT2012-38650-C02-01	es
dc.relation.publisherversion	http://dx.doi.org/10.1016/j.matchar.2016.06.028
dc.rights	Elsevier	en
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.accessRights	open access
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.eciencia	Materiales	es
dc.subject.other	Ti-6Al-4V
dc.subject.other	Molybdenizing	en
dc.subject.other	Powder metallurgy	en
dc.subject.other	Thermodynamic calculations	en
dc.subject.other	Pack cementation	en
dc.title	Molybdeno-Aluminizing of Powder Metallurgy and Wrought Ti and Ti-6Al-4Valloys by Pack Cementation process	en
dc.type	research article	*
dc.type.hasVersion	AM	*
dspace.entity.type	Publication