Fabrication of TiAl Target by Mechanical Alloying and Applications in Physical Vapour Deposition Coating

Abstract:

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 TiAlN 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.

• Periodical: Materials Science Forum (Volumes 534-536)
• Pages: 805-808
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.534-536.805
• Online since: January 2007
• Authors: Brian Gabbitas, Peng Cao, Stiliana Raynova, De Liang Zhang
• Keywords: Coating, Composite Powders, Mechanical Alloying (MA), Physical Vapor Deposition (PVD), TiAl Intermetallics

References

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