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SIALON Engineering Ceramic Specimen Preparation
(Class 10 Procedures)

Metallographic Class 10 sample preparation


SIALON ceramics is a machineable ceramic and is thus fairly easy to prepare for microstructural evaluation. The primary concern is to minimize excessive cracking during cutting and initial grinding through the use of the appropriate diamond wafering blade and with semi-fixed abrasives on a metal mesh cloth. Polishing with CMP (chemical mechanical polishing) techniques is also a very effective way to remove surface and subsurface damage to the specimen.

SECTIONING

Diamond Wafering blade - medium grit / low concentration)

MOUNTING

Castable Mounting with Epoxy or Acrylic resins

POLISHING

Abrasive/surface

Lubricant

Force/ sample

Speed
(Head/base)

Time

Individual
Force mode

Central Force
mode

70 micron diamond grinding disk*

Water

5-10 lbs

200/200 rpm

Until plane

 
30 um DIAMAT diamond suspension on CERMESH Metal Mesh cloth   5-10 lbs

200/200 rpm

5 minutes Metallographic individual polishing force
6 um DIAMAT diamond on TEXPAN polishing pad SIAMAT colloidal silica 10 lbs

200/200 rpm

5 minutes Metallographic individual polishing force

1 um DIAMAT diamond on GOLDPAD or ATLANTIS polishing pad

SIAMAT colloidal silica

10 lbs

200/200 rpm

5 minutes

Metallographic individual polishing force

SIAMAT Colloidal silca on TEXPAN polishing pad

 

10 lbs

100/100 rpm

5 minutes

Metallographic individual polishing force
*Required for central polishing force. Click here for more information on central vs. individual polishing force polishing.

Metallographic micrograph for SIALON ceramic

SiAlON ceramic, etched in molten KOH, Mag 20,000X

ETCHING

Common Etchants
PACE Technologies Recommended Etchants

PACE Technologies Etchant Database

CAUTION:Safety is very important when etching. Be sure to wear the appropriate protective clothing and observe all WARNINGS on chemical manufacuters SDS (Safety Data Sheets). Also review the COMMENTS and CONDITIONS Section for each etchant.


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Metallographic
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