Abstract
In this investigation, TaN coating was deposited on ASTM-F1295 grade Ti6Al7Nb alloy by radio frequency magnetron sputtering. Structural, surface morphological, and compositional analyses were conducted using Grazing Incidence-XRD, FESEM, EDS and XPS. The results affirmed that uniform and sub-stoichiometric TaN coating was deposited with the polycrystalline nature of TaN, exhibiting a cubic-NaCl-like structure. Nanoindentation tests revealed that the hardness and modulus of TaN coating decrease with increasing indentation load. Moreover, scratch test under progressive loading conditions uncovered critical loads corresponding to cohesion and adhesion failures. Nanotribological tests were conducted on deposited TaN against different counter bodies (steel and ceramic ball) disclosed fine abrasive grooves on the coating and demonstrate anti-wear properties.
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