 |
PAL
KERAMIT |
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|
| PFM ALLOYS |
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|
Pal Keramit features a high modulus
of elasticity which lends it strength,
whilst also making it suitable for
the manufacture of long span bridges. |
| This
alloy can be easily cast and soldered,
and displays an excellent oxidation
colour (light grey). |
|
|
|
Chemical composition |
| Pd |
Ag |
In |
Sn |
Ga |
Ru |
Au&PGM |
| 57.4% |
32.0% |
1.0% |
8.0% |
1.5% |
x |
57.5% |
|
X=<1,0%
|
| Technical
data: |
|
Density
g/cm³ |
11.2 |
Yield strength MPa |
530 - 560 |
|
Melting range °C |
1080–1240 |
Elongation % |
22 - 18 |
|
Casting temperature°C |
1390 |
Tensile strength MPa |
720 - 840 |
|
TEC 25-500°C-25-600°C 10-6K-1 |
14.6-14.9 |
Vickers hardness HV5/30 |
280–340–355 |
|
Modulus of elasticity GPa |
120 |
Crucible |
ceramic |
|
| Solders |
| Pre-solder |
|
| Post-solder: |
SOLDER K 10/5 (750°C) Z - SOLDER LFC
(650°C) |
|
| Corrosion
resistance |
The electrochemical properties of this alloy were
evaluated in an electrochemical cell built according
to standards defined in ISO 10271.
The following results were obtained: |
| Eocp
= 75 mV |
Ep = 950 mV |
I300
= 0.27µA◦cm-² |
Ip = 7.53µA◦cm-² |
|
| The high
value of the breakdown potential (Ep 950 mV) with
the low current density at 300 mV (I300
= 0.27µA◦cm-²) indicate the excellent
corrosion resistance of this alloy. |
| Cytotoxicity
testing |
| Cytotoxicity
of PAL KERAMIT alloy has been evaluated according
to ISO 10993-5 standard, using the L-929 (mouse
fibroblasts) cell line. |
| Results
have confirmed the perfect cytocompatibility of
this alloy. Cells behaviour and function were definitely
similar to those measured in tests involving pure
gold, that is the paradigmatic non-toxic material. |
| International
standards: |
| ISO 9693:1999;
ISO10271:2001; ISO10993-5:1999 |
| Specific
properties |
| :: |
PFM
alloy, white colour |
| :: |
Copper free |
| :: |
Low density |
| :: |
Micro
Grain structure: high casting precision |
| :: |
Ideal
for single crowns, long bridges and millings |
| :: |
Excellent
metal-ceramic bonding |
| :: |
Very
light oxidation |
| :: |
Easy
to polish |
|
| |
