| Why
is size important? |
| In
free abrasive applications, size affects... |
| |
| |
| Material
Removal Rate: distribution of sizes within a grade determines
the number of contact points with workpiece. |
| |
|
Surface
Finish: crystal size determines the magnitude of "peak
to valley" features
inscribed into workpiece.
|
| |
 |
Broad
PSD’s
- Fewer contact points.
- Non-uniform finish.
Narrow PSD’s
- More contact points.
- Uniform finishes.
|
 |
| |
| |
| "Size"
Measurement Important considerations... |
|
 |
| Superfines
low quality diamond, On-size high quality diamond, and Oversize
low quality diamond. |
| |
| GE
process designed to eliminate superfines and oversize! |
| |
| How
are Micron Powders Specified? |
| |
 |
Coulter
Multisizer II
- For sizes coarser than 2 to 4 microns.
- Consistent analysis procedures.
- Statistics based on population or volume distribution.
- Mean size range.
- Maximum standard deviation or percentiles.
- Oversize limits.
Microtrac
X-100 / Horiba LA 910
- For sizes 2-4 microns and finer.
- Consistent analysis procedures.
- Statistics based on volume distribution.
- Mean size range.
- Maximum standard deviation.
- Oversize limits.
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