Fabrication of TiAl target by mechanical alloying and applications in physical vapour deposition coating
Gabbitas, B., Cao, P., Raynova, S. & Zhang, D. (2007). Fabrication of TiAl target by mechanical alloying and applications in physical vapour deposition coating. Materials Science Forum, 534-36(1), 805- 808.
Permanent Research Commons link: https://hdl.handle.net/10289/1410
The research involves the development of a powder metallurgical route for producing good quality TiAl targets for making physical vapour deposition (PVD) coatings. Mixtures of elemental titanium and aluminium powders were mechanically milled using a novel discus milling technique under various conditions. Hot isostatic pressing (HIP) was then employed for consolidation of the mechanically alloyed powders. A cathodic arc vapour deposition process was applied to produce a TiAIN coating. A microstructural examination was conducted on the target material and PVD coatings, using X-ray diffractometry (XRD), X-ray photoelectron spectrometry (XPS) and scanning electron microscopy (SEM). It has been found that combining mechanical alloying and HIP enable us to produce a fairly good quality of TiAl based target. The PVD coatings obtained from the TiAl target showed very high microhardness values.
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