Optical+Microscopy

=Optical Microscopy= Home

Representative Photos of:
 * China
 * USA
 * Comparison

Polishing
**Fig.1** 4x magnification; **Fig. 2** 10x magnification; MnS inclusions in bulk material.

Etching

 * Fig.3** 4x magnification; Uniform microstructure.

**Fig.4** 10x magnification; Single white layer at surface.



**Fig.5** 40x magnification; Corner on surface showing thicking white layer and network pattern.



**Fig.6** 10x magnification; Transition region to double white layer area. **Fig.7** 10x magnification; Double white layer at surface; middle, thick white later has a similar microstructure to bulk.

//USA//
**Fig.8** 4x magnification; **Fig.9** 4x magnification; Uniform microstructure. **Fig.10** 4x magnification; Non-uniform white layer. Appears at various thicknesses at different areas in the surface. **Fig.11** 4x magnification; Non-uniform white layer. Appears at various thicknesses at different areas in the surface. **Fig.11** 10x magnification; Interface between white layer and bulk.

**Fig. 12** a)China - 10x magnification b) USA - 4x magnification