A new biocompatible coating layer was successfully prepared on titanium (Ti) substrate. by hydrothermal treatment in an acidic zinc phosphate solution at 250̊C for 8h or longer time. Elemental analysis of the crystalline coating layer showed the existence of Zn, Ti and P with an approximate atomic ratio of 0.27:0.86:1. From X-ray diffractometry, the crystalline coating structure could be indexed as tetragonal lipscombite-like structure (space group, I4 1/amd) with lattice parameters of a=0.5173nm and c=1.3017nm and was identified as a new zinc titanium phosphate (Ti-Zn-PO 4) phase. The interfacial fracture strength between substrate and Ti-Zn-PO 4 coating layer prepared at 250̊C for 10h was higher than the measured adhesive strength value (48.3±9.2MPa). In vitro cell study indicated that cell proliferation results for Ti-Zn-PO 4 layer were much better than those for non-coated Ti substrates. We therefore concluded that the Ti-Zn-PO 4 coating might be useful for biomedical applications such as Ti implants.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry