**3. Conclusions of this paper**

40 Ceramic Coatings – Applications in Engineering

TiNi SMA

TiNi anodic oxidation

TiNi electrodeposition(annealed)

0 10 20 30 40 50 60 70

t/min

1. After TiNi SMA sample anodically-oxidized was dipped in SBF solution (PH7.40) for 7d, there were more amount of Ca, P and O elements deposited on the surface. This illustrates that the capability to adsorb Ca/P layer of the anodically-oxidized sample is

2. After TiNi SMA sample cathodically-electrodeposited was dipped in SBF solution (PH7.40) for 7d, there were higher contents of Ca and P elements deposited. The mole ratio of Ca and P reached to 2.4 : 1. And Ca and P mole ratio after crystallization at 450C was 1.8 : 1. XRD analytical result showed that both crystallized and uncrystallized samples cathodically-electrodeposited have HA in existence. It illustrates that after the amorphous Ti-O film riching in Ti-OH group was dipped in SBF solution for 7d, HA could be formed on the surface; it also illustrates that TiO2 obtained after

3. In the experiment of haemolysis rate, the haemolysis rate of surfacely-modified TiNi SMA got decreased somewhat. But the haemolysis rate of cathodically-electrodeposited sample was higher than that of anodically-oxidized one. And this was relevant to

4. In the experiment of dynamic coagulation time, the surface modified TiNi SMA samples had a better anti-coagulation property. But the absorbance of the anodicallyoxidized one was the highest, coagulation time longest, showing the best anti-

stronger, so TiNi SMA after anodic oxidization may have some bioactivity.

0.00

**2.4 Summary of this chapter** 

Fig. 2-5. Absorbance of modified TiNi SMA versus time

crystallization has some bioactivity.

coagulation property.

surface smoothness differences of the samples.

0.05

0.10

0.15

0.20

O.D.

0.25

0.30

0.35

0.40

