Surface chemistry of the titanium powder studied by XPS using internal standard reference
Journal article, 2017

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.

XPS

anatase

rutile

oxide layer thickness

surface contaminations

titanium oxide standards

calcium titanate

calcium oxide

Author

Ruslan Shvab

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Eduard Hryha

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Lars Nyborg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Powder Metallurgy

0032-5899 (ISSN)

Vol. 60 1 42-48

Subject Categories

Materials Engineering

Metallurgy and Metallic Materials

Areas of Advance

Production

Materials Science

DOI

10.1080/00325899.2016.1271092