Authors:
Yijun Liu (The Manufacturing Technology Centre, United Kingdom),
Andrew Triantaphyllou (The Manufacturing Technology Centre, United Kingdom),
Robert Ireson (Glass Technology Services Ltd, United Kingdom),
Chris Holcroft (Glass Technology Services Ltd, United Kingdom),
Malcolm Glendenning (Glass Technology Services Ltd, United Kingdom)
Abstract:
The present study demonstrates the feasibility to fabricate a multiscale bioactive surface structure onto a biomedical grade Ti-6Al-4V alloy substrate using a multi-material blown powder laser Direct Energy Deposition process (DED). The multiscale surface structure consisted of two layers: a Ti-6Al-4V transition layer with a customised structure, deposited onto a Ti-6Al-4V alloy substrate, followed by a layer of customised bioactive glass cladded on top. It is possible to create a transition layer with physical interlocking features that are fully bonded with the bioactive glass for enhancement of the metal-glass adhesion. The metal|glass interface was characterised in terms of metallurgical reactions and mechanical properties. Indentation tests confirmed excellent cohesion of the metal-glass interface. The microhardness of the bioactive glass near the interface varied from 5.44 to 7.78 GPa. Fracture toughness of the cladded glass was estimated in the range of 1.40-3.91 MPa m1|2.
DOI:
https://doi.org/10.59499/WP225370564