S044012 Acoustic Emission Signals from Plasma-Sprayed Hydroxyapatite Coating in 4-points Bending Adhesive Strength Test

Abstract

The purpose of this research is to propose a simpler method of evaluating adhesive strength for hydroxyapatite (HAp) coating using four-points bending test with a slit coated specimen. AE signals were recorded and delamination behavier from the edges of HAp coating was observed during fourpoints bending test in order to specify delamination points. AE signals from HAp coating specimen was observed earlier compared with that from Ti substrate. Delamination starting point of HAp coating is about 120MPa and energy release rate G_<max> is calcurated to be 8.59[N/m].