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I
NSTRUCTION
M
ANUAL
3601 E. 34th St. Tucson, AZ 85713 USA Tel. +1 520-882-6598 Fax +1 520-882-6599 email: [email protected] Web: http://www.metallographic.com
37
Please read this instruction manual carefully and follow all installation, operating and safety guidelines.
NANO 1000T / FEMTO 1500
Polishing Head
CLASS 2 Polishing Procedures
5.11.2 Rhenium and Refractory Alloys
Refractory metals such as Rhenium, Niobium, Tungsten and Molybdenum are
a very soft, and any loose or fracture abrasive particles can easily embed. This
makes specimen preparation very difficult because it gums up diamond
grinding disks or becomes embedded with fractured SiC particles when ground
with SiC papers. The key to preparation of this material is to use the tougher
alumina abrasive and to chemically etch the specimen between each grinding
step. The purpose of etching is to remove the embedded particles and not carry
them over as contamination.
Abrasive/surface
Lubricant
FEMTO pressure
setting (psi)
Time
Head / Wheel speed
P120 grit ALO paper*
P220 grit ALO paper*
Water
60-75
100/100 rpm
Until plane
1 minute
P220 grit ALO paper
P500 grit ALO paper
P1200 grit ALO paper
Water
60-75
Until plane
1 minute
1 minute
100/100 rpm
1 um DIAMAT diamond on
ATLANTIS pad
DIALUBE Purple
Extender
60-75
2 minutes
100/100 rpm
0.05 um acidic Nanometer
acid alumina on a
BLACKCHEM 2 pad
Polishing with
10% Diluted
etchant below:
Rhenium - 30 ml
lactic acid, 30 ml
HNO3, 1 ml HF
5-10 lbs
1 minute
100/100 rpm
Rhenium (BF), etched
* Recommended for Central Force holders (this step not required for Individual Force holders)