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Surface chemistry of the titanium powder studied by XPS using internal standard reference

Ruslan Shvab (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Eduard Hryha (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Lars Nyborg (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik)
Powder Metallurgy (0032-5899). Vol. 60 (2017), 1, p. 42-48.
[Artikel, refereegranskad vetenskaplig]

Surface chemistry of the titanium powder has particularly growing interest due to the increasing application of titanium components prepared by powder metallurgy, in particular metal injection moulding and additive manufacturing. Due to the high chemical activity, number of titanium oxides, calcium and complex Ca–Ti–oxides can be expected on the component/medical implant surface, depending on powder and component manufacturing and post-treatment, but are very difficult to analyse due to the lack of the experimental data and analysis methodology. Therefore, a methodology for the analysis of the surface chemistry of the Ti-powder by XPS utilising internal standard reference was developed. The obtained methodology was used for the surface analysis of titanium powder and identification of its surface oxide composition. The results show that the powder surface is covered by TiO2 layer in the form of rutile with a thickness of 4.4 nm. Carbon and nitrogen impurities were also found present on the powder surface.

Nyckelord: anatase , calcium oxide , calcium titanate , oxide layer thickness , rutile , surface contaminations , titanium oxide standards , XPS



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Denna post skapades 2017-03-27. Senast ändrad 2017-04-19.
CPL Pubid: 248682

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)

Ämnesområden

Materialvetenskap
Produktion
Materialteknik
Metallurgi och metalliska material

Chalmers infrastruktur