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Metallographic Polycrystalline Diamond

metallographic abrasive blades

Diamond Polishing Abrasives


Selection Guidelines ] Recommended Procedures ] Trouble Shooting ] Product Description ] [ Home ]



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
           

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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.
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TROUBLE SHOOTING GUIDE for POLYCRYSTALLINE DIAMOND

Symptom

Cause

Action

Agglomerated diamond

  • Pre-mixing diamond suspension with colloidal silica
  • Bacterial growth in diamond suspension
  • Alternate dispensing of diamond and colloidal silica
  • Replace diamond
  • Coarse scratches

  • Contaminated pad
  • Improper selection of polishing pad
  • Replace polishing pad
  • Review polishing pad selection guide-line or use a softer polishing pad

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    POLYCRYSTALLINE DIAMOND PRODUCT DESCRIPTION

    Polycrystalline Diamond Suspensions (water-based)

    Description

    Quantity

    Low Viscosity

    High Viscosity

     

    0.05 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-0105-250
    GPC-0105-500
    GPC-0105-1GL

    PC-0105-250
    PC-0105-500
    PC-0105-1GH

     

    0.1 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-0110-250
    GPC-0110-500
    GPC-0110-1GL

    PC-0110-250
    PC-0110-500
    PC-0110-1GH

    Metallographic 0.01 micron diamond suspension

    0.25 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-0125-250
    GPC-0125-500
    GPC-0125-1GL

    PC-0125-250
    PC-0125-500
    PC-0125-1GH

    0.5 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-0150-250
    GPC-0150-500
    GPC-0150-1GL

    PC-0150-250
    PC-0150-500
    PC-0150-1GH

    Metallographic 0.5 micron polycrystalline diamond suspension

    1 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1001-250
    GPC-1001-500
    GPC-1001-1GL

    PC-1001-250
    PC-1001-500
    PC-1001-1GH

    Metallographic 1 micron polycrystalline diamond

    3 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1003-250
    GPC-1003-500
    GPC-1003-1GL

    PC-1003-250
    PC-1003-500
    PC-1003-1GH

    Metallographic 3 micron polycrystalline diamond suspension

    6 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1006-250
    GPC-1006-500
    GPC-1006-1GL

    PC-1006-250
    PC-1006-500
    PC-1006-1GH

    Metallographic 6 micron polycrystalline diamond suspension

    9 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1009-250
    GPC-1009-500
    GPC-1009-1GL

    PC-1009-250
    PC-1009-500
    PC-1009-1GH

    Metallographic 9 micron polycrystalline diamond suspension

    15 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1015-250
    GPC-1015-500
    GPC-1015-1GL

    PC-1015-250
    PC-1015-500
    PC-1015-1GH

    Metallographic 15 micron diamond suspension

    30 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1030-250
    GPC-1030-500
    GPC-1030-1GL

    PC-1030-250
    PC-1030-500
    PC-1030-1GH

    Metallographic 30 micron polycrystalline diamond suspension

    45 micron DIAMAT Polycrystalline diamond

    250 ml
    500 ml
    1 gallon

    GPC-1045-250
    GPC-1045-500
    GPC-1045-1GL

    PC-1045-250
    PC-1045-500
    PC-1045-1GH

    Metallographic 45 micron polycrystalline diamond suspension

    Polycrystalline Diamond Suspension - Dyed

    Description

    Quantity

    Catalog Number

    1 micron (blue) DIAMAT PC Diamond Suspension

    1 liter

    PC-1001-1L

    Metallographic dyed PC diamond suspension

    3 micron (green) DIAMAT PC Diamond Suspension

    1 liter

    PC-1003-1L

    6 micron (yellow) DIAMAT PC Diamond Suspension

    1 liter

    PC-1006-1L

    Metallographic dyed PC diamond suspension

    9 micron (red) DIAMAT PC Diamond Suspension

    1 liter

    PC-1009-1L

    15 micron (brown) DIAMAT PC Diamond Suspension

    1 liter

    PC-1015-1L

    Metallographic dyed PC diamond suspension

    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
    diamond paste (0.1-micron)

    5 gm
    20 gm

    PC-0210-05
    PC-0210-20

    Metallographic 0.10 micron paste

    DIAMAT Polycrystalline
    diamond paste (0.25-micron)

    5 gm
    20 gm

    PC-0225-05
    PC-0225-20

    Metallographic 0.25 micron paste

    DIAMAT Polycrystalline
    diamond paste (0.50-micron)

    5 gm
    20 gm

    PC-0250-05
    PC-0250-20

    Metallographic 0.5 micron paste

    DIAMAT Polycrystalline
    diamond paste (1-micron)

    5 gm
    20 gm

    PC-2001-05
    PC-2001-20

    Metallographic 1 micron paste

    DIAMAT Polycrystalline
    diamond paste (3-micron)

    5 gm
    20 gm

    PC-2003-05
    PC-2003-20

    Metallographic 3 micron paste

    DIAMAT Polycrystalline
    diamond paste (6-micron)

    5 gm
    20 gm

    PC-2006-05
    PC-2006-20

    Metallographic 6 micron paste

    DIAMAT Polycrystalline
    diamond paste (9-micron)

    5 gm
    20 gm

    PC-2009-05
    PC-2009-20

    Metallographic 9 micron paste

    DIAMAT Polycrystalline
    diamond paste (15-micron)

    5 gm
    20 gm

    PC-2015-05
    PC-2015-20

     

    Diamond Extenders (lubricants)

    Description

    Quantity

    Catalog Number

     

    DIALUBE diamond extender

    32 oz (0.24l)
    1 gallon (3.8l)

    DL-3000-32
    DL-3000-128

    Metallographic Diamond Lubricants

    DIALUBE Blue Alcohol lubricant

    32 oz (0.24l)
    1 gallon (3.8l)

    AOD-3000-32
    AOD-3000-128

    DIALUBE Purple Alcohol lubricant

    32 oz (0.24l)
    1 gallon (3.8l)

    ADL-3000-32
    ADL-3000-128

    Metallographic diamond polishing lubricants

    POLYLUBE non-aqueous diamond extender

    32 oz (0.24l)
    1 gallon (3.8l)

    PDL-3000-32
    PDL-3000-128

    POLYLUBE red (anti-corrosion) lube

    32 oz (0.24l)
    1 gallon (3.8l)

    PDL-3000R-32
    PDL-3000R-128


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