Characterization of hydroxyapatite and titanium coatings sputtered on Ti-6Al-4V substrate

Shinn Jyh Ding, Chien-Ping Ju, Jiin-Huey Chern

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A series of thin (<10 μm), single-layered HA/Ti coatings were deposited on Ti-6Al-4V substrate using a radio frequency magnetron-assisted sputtering system. The adhesion strength, microstructure, and chemistry of the coatings were characterized. Experimental results showed that higher Ti contents in targets or coatings resulted in higher deposition rates. When Ti was added the highly crystalline structure of monolithic HA coating was largely disrupted and the coating became amorphous-like. The highly crystalline structure of the monolithic Ti coating was also disrupted by introducing small amounts of Ca, P, and O into the coating. The HA/Ti coatings had quite uniform thicknesses and appeared smooth, dense, and well bonded to the substrate. A scanning electron microscope with an energy dispersive spectroscopy system showed that monolithic HA, 95HA/5Ti, 25HA/75Ti, and 50HA/50Ti coatings had the lowest Ca/P ratios while the 75HA/25Ti coating had the highest. The adhesion strengths of all coatings were between 60 and 80 MPa.

Original languageEnglish
Pages (from-to)266-279
Number of pages14
JournalJournal of Biomedical Materials Research
Issue number3
Publication statusPublished - 1999 Jul 1

All Science Journal Classification (ASJC) codes

  • Biomaterials
  • Biomedical Engineering

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