Diamond Polishing Abrasives
|
|
Polycrystalline diamond as compared to synthetic and natural monocrystalline diamond provides better surface finishes and higher removal rates for metallographic specimen preparation. The features and advantages of polycrystalline diamond include the following:
- Higher cutting rates
- Very uniform surface finish
- More uniform particle size distribution
- Higher removal rates (self sharpening abrasives)
- Harder/tougher particles
- Blocky shaped
- Hexagonal microcrystallites (equally hard in all directions)
- Extremely rough surface (more cutting points)
- Surface area 300% greater than monocrystalline diamond
- No abrasion-resistant directionality (abrasion independent of particle orientation)
Metal |
Coarse SiC | Fine Grinding, SiC | Rough Polishing (Diamond) | Final Polishing (oxide) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Abrsive size |
180 |
240 |
320,400, 600 |
800 |
1200 |
9 um |
6 um |
3 um |
1 um |
Al2O3 |
SiO2 |
Aluminum |
|||||||||||
Copper/ brass |
|||||||||||
Stainless steel |
|||||||||||
Soft steel |
|||||||||||
Hard steel |
|||||||||||
Tool steel |
|||||||||||
Titanium |
|||||||||||
Zinc, tin, lead |
|||||||||||
DIAMOND ABRASIVE SLECTION GUIDELINES
Ceramic/ Composite |
Coarse Grind |
Fine Grind |
Rough Polish |
Fine Polish |
||
|---|---|---|---|---|---|---|
Diamond size |
30 um |
15 um |
9 um |
6 um |
3 um |
1um + SiO2 |
Alumina |
||||||
Silicon nitride |
||||||
Polymer composite |
||||||
Metal matrix composite |
||||||
Ceramic matrix composite |
||||||
Cermet |
||||||
RECOMMENDED APPLICATION of POLYCRYSTALLINE DIAMOND
- The most efficient application of polycrystalline diamond is to initially apply several beads of diamond and/or extender for initial pad wetting. Note that saturation of the pad is not required nor recommended. Additional dispensing is generally dripped onto the surface at a rate of 1-2 drops every 10-15 seconds depending upon the polishing speed and surface area of the samples
- For mineral and ceramic specimen preparation it is recommended that diamond and colloidal silica (SIAMAT colloidal silica) be alternately dispensed. This provides a chemomechanical polishing (CMP) action which significantly increases removal rates, reduces subsurface damage and improves surface finish. This techniques is useful for 6 micron and smaller polycrystalline diamond. For this application it is best to clean the cloth and samples for the last 15 seconds of the cycle by running water on the polishing pad surface.
TROUBLE SHOOTING GUIDE for POLYCRYSTALLINE DIAMOND
|
Symptom |
Cause |
Action |
|
Agglomerated diamond |
|
|
|
Coarse scratches |
|
|
POLYCRYSTALLINE DIAMOND PRODUCT DESCRIPTION
|
Polycrystalline Diamond Suspensions (water-based) |
|||||
|
Description |
Quantity |
Low Viscosity |
High Viscosity |
||
|
0.1 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-0110-250 |
PC-0110-250 |
||
|
0.25 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-0125-250 |
PC-0125-250 |
||
|
0.5 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-0150-250 |
PC-0150-250 |
||
|
1 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1001-250 |
PC-1001-250 |
||
|
3 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1003-250 |
PC-1003-250 |
||
|
6 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1006-250 |
PC-1006-250 |
||
|
9 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1009-250 |
PC-1009-250 |
||
|
15 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1015-250 |
PC-1015-250 |
||
|
30 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1030-250 |
PC-1030-250 |
||
45 micron DIAMAT Polycrystalline diamond |
250 ml |
GPC-1045-250 |
PC-1045-250 |
||
|
Polycrystalline Diamond Suspension - Dyed |
||||
|
Description |
Quantity |
Catalog Number |
||
|
1 micron (blue) DIAMAT PC Diamond Suspension |
1 liter |
PC-1001-1L |
||
3 micron (green) DIAMAT PC Diamond Suspension |
1 liter |
PC-1003-1L |
||
6 micron (yellow) DIAMAT PC Diamond Suspension |
1 liter |
PC-1006-1L |
||
9 micron (red) DIAMAT PC Diamond Suspension |
1 liter |
PC-1009-1L |
||
15 micron (brown) DIAMAT PC Diamond Suspension |
1 liter |
PC-1015-1L |
||
30 micron (orange) DIAMAT PC Diamond Suspension |
1 liter |
PC-1030-1L |
||
45 micron (purple) DIAMAT PC Diamond Suspension |
1 liter |
PC-1045-1L |
||
|
Polycrystalline Diamond Paste |
||||
|
Description |
Quantity |
Catalog Number |
||
|
DIAMAT Polycrystalline |
5 gm |
PC-2001-05 |
||
|
DIAMAT Polycrystalline |
5 gm |
PC-2003-05 |
||
|
DIAMAT Polycrystalline |
5 gm |
PC-2006-05 |
||
|
DIAMAT Polycrystalline |
5 gm |
PC-2009-05 |
||
|
DIAMAT Polycrystalline |
5 gm |
PC-2015-05 |
||
|
Diamond Extenders (lubricants) |
||||
|
Description |
Quantity |
Catalog Number |
||
|
DIALUBE diamond extender |
32 oz (0.24l) |
DL-3000-32 |
||
DIALUBE Blue Alcohol lubricant |
32 oz (0.24l) |
AOD-3000-32 |
||
DIALUBEPurple Alcohol lubricant |
32 oz (0.24l) |
ADL-3000-32 |
||
POLYLUBE non-aqueous diamond extender |
32 oz (0.24l) |
PDL-3000-32 |
||
POLYLUBE red (anti-corrosion) lube |
32 oz (0.24l) |
PDL-3000R-32 |
||