Polishing techniques

The EBSD technique measures the top few monolayers of a sample to determine its crystal structure. However, most polishing techniques leave a damaged layer on the samples. Even 1 or 0.25 pm diamond polish is not sufficient. For EBSD work, a final polish with colloidal silica (grain size 0.05 pm) is often required to remove the damaged surface layers. 

Demonstration of cutting, piercing, soldering, filing, and polishing techniques The World of Chemistry. 19 Metals. 30 min. University of Maryland and the Educational Film Center, 1990. 

A thin detector array portion 10 is bonded to a read-out circuit 12. The detector array employs a thin transparent substrate 14 of CdTe and a thin detector layer 16 of HgCdTe. After the detector array has been bonded to the read-out circuit, the detector layer and the transparent substrate are thinned to a thickness of 25 to 400 pm by using lapping and polishing techniques. 

Emphasis was first placed on the adsorptive behavior of Compound D on the surface of chromium because that metal has the following desirable properties (a) it is an excellent adsorbent for carboxylic acid groups (5) (b) a large body of data is available on the properties of adsorbed, monomolecular films of aliphatic (16), partially fluorinated (13), fully fluorinated (2), and chloro-fluoro carboxylic acids (2) (c) the metal surface can be readily and reproducibly cleaned by standard metal-lographic polishing techniques and (d) there is a hard, coherent, thin-film oxide on the surface (18). 

The Ni(lll) specimen used in this research was a circular disk with a cross sectional area of about 0.785 cm (purchased from Cornell Laboratory ). Prior to its introduction into the main UHV chamber, it was oriented to +/- 1 by Laue backdiffrac-tion , cut by spark erosion and polished to 0.05 ft employing conventional polishing techniques. 

Transverse sections were prepared by standard metallographic polishing techniques with one addition involving as a first step, coating the surface with a gold layer by sputtering. This enabled identification of the outer gas interface during subsequent analysis. 

Because many of the required skills are the same, a competent nuclear chemist or radiochemist can move from one of the above-mentioned fields to another. Radioanalytical chemists combine separation techniques of classical chemical qualitative and quantitative analysis with the radiation detection techniques of nuclear physics. Practitioners polish techniques for processing distinctive sample matrices, separating various sets of radionuclides, and improving detection sensitivity. In some instances, informed use of radiation detection techniques eliminates any need for chemical separations, or mass spectrometry replaces radiation detection. 

Chemical vapor deposited silicon carbide (CVD-SiC) is the second most ideal material for deflection mirrors used in short wavelength laser system, next only to crystalline diamond. Conventional polishing techniques were found insufficient to produce CVD-SiC mirrors. The conclusions drawn in this study are as follows ... 

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