Hydroxyapatite and Other Biomedical Coatings by Electrophoretic Deposition - Biological and Biomedical Coatings: Processing and Characterization - page 100

TABLE 3.3 (Continued)
Summary of Reported Work on Aqueous and Organic Electrophoretic Deposition of Other Bioceramics

Particle
Size

Medium
Type

Solids
Loading

Voltage
(V)

Time
(min)

Temp.
(°C)

Heat
Treatment

Deposit
Properties Coating Substrate SuspensionMedium Reference

Y-ZrO 2 (YSZ c )

Nonaqueous Anode: porous

Ni-cermet/Cu
Cathode: Cu
Electrode
separation:
1 cm

Medium: ethanol
pH adjustment: glacial
acetic acid
Dispersant:
polyethylene imine

2 vol.% 1-30 1-4 Deposit

thickness:
12 μm

61

Y-ZrO 2 (YSZ c )

Aqueous Cathode: Pt

Electrode
separation:
2 cm

Medium: H 2 O + acetic
acid

40 wt.% 5-30 20-60 25 1450°C,

2 h

Deposit
thickness:
2-4 mm,
porous, no
cracking

62

Y-ZrO 2 (CSZ e )

Aqueous Anode: steel

Cathode:
corrugated
steel

Medium: H 2 O
Suspension pH: 3-7
pH adjustment: 0.1 M
HCl

4-8 wt.% 1000°C,

45 min

Deposit
thickness:
5 μm in
trenches,
2 μm on
top of
proile

63

Y-ZrO 2 (CSZ e )

0.26 μm Nonaqueous Anode:

Fecralloy
Cathode:
Fecralloy
Electrode
separation:
1 cm

Medium: acetylacetone
Suspension pH: 4.4-8.4
pH adjustment: acetic
acid, triethanolamine

25 g/L 60 0.5-2 25 1200°C,

6 h

Deposit
thickness:
50 μm, no
cracking

64

Y-ZrO 2 (CSZ e )

Nonaqueous Anode:

NiO-YSZ c +
graphite
Cathode:
stainless steel
Electrode
separation:
1 cm

Medium: acetylacetone,
ethanol

0-50 0-15 25 1400°C,

2 h

Deposit
thickness:
13-32 μm,
no
cracking

65