This Part of ENV 623 describes procedures for polishing and etching test pieces of advanced technical monolithic ceramics, followed by the preparation of micrographs of the microstructure and methods of making measurements for the determination of grain size.
The method applies to single-phase ceramics, and to ceramics with a principal crystalline phase and a glassy grain-boundary phase of less than about 10 X by volume. The measurements described do not apply to ceramics with more than about 10 X by volume of pores or of continuous glassy phase, nor to ceramics with more than one crystalline phase. Such materials require alternative methods which allow the pores or phases to be distinguished and counted separately, and this is beyond the scope of the method.
NOTE : This standard does not cover automatic image analysis methods of determining grain size and other parameters. By agreement between parties, such methods may be used as an alternative to this Standard.
DS/ENV 623-3:1993 history
1993DS/ENV 623-3:1993 Advanced technical ceramics. Monolithic ceramics. General and textural properties. Part 3: Determination of grain size