Ceramics-Silikáty 52 (3) 130-138 (2008)

Adhesion of the bioactive layer on titanium alloy substrate by tape-test

D. Horkavcová, B. Plešingerová, A. Helebrant, M. Vojtko, V. Procházka

The aim of this work was to check whether the ASTM D 3359 is a suitable method for adhesion measurement of the layers formed on Ti₆Al₄V surfaces by a) alkali treatment in 10 mol.l-1 NaOH, b) precalcification in SCS (supersaturated calcification solution) and c) in vitro tests in SBF (simulated body fluid). Tape-test is suitable for evaluation of adhesion of coatings after chemical treatment and after short-time precalcification. Adhesion of the coatings is excellent, classified into category 5. The test is not suitable for coatings precalcified for the long time when the big spherical crystals are formed. The cracking of the coatings during drying of samples inhibits obtaining reliable results of adhesion of HA-coatings to substrate after in vitro tests.

Keywords: Adhesion, Tape-test, Ti₆Al₄V, Surface treatment, Precalcification