Accession Number : AD0427177


Title :   RESEARCH AND DEVELOPMENT ON ADVANCED GRAPHITE MATERIALS. VOLUME 22 - PHOTOMICROGRAPHIC TECHNIQUES FOR CARBON AND GRAPHITE


Corporate Author : UNION CARBIDE CORP LAWRENCEBURG TN CARBON PRODUCTS DIV


Personal Author(s) : Peters, G L ; Shade, H D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/427177.pdf


Report Date : Nov 1963


Pagination or Media Count : 42


Abstract : Photomicrographic techniques were used to examine the microstructure of many grades of carbon and graphite. These techniques have aided in the study of these grades and in predicting or understanding their behavior in various applications. Photomicrography has allowed identification of various materials such as cokes, graphites, pitch, within the formed article and has permitted a study of the distribution of these materials. The effect of impregnation of the graphite with pitches and resins can be more clearly defined by careful photomicrographic examination. Standard metallographic equipment can be used for such studies but preparation of the carbon and graphite requires special techniques. Mounting methods to prevent smearing or chipping of the samples during preparation and to obtain highly polished surfaces are discussed. Also described are various techniques of lighting to aid in revealing and interpreting microstructure, and different types of photographic film, plates, developers and printing papers required for showing pertinent details in the final photomicrograph.


Descriptors :   *PHOTOMICROGRAPHY , *GRAPHITE , *CARBON , *MICROSTRUCTURE , PYROLYTIC GRAPHITE , DIAMOND WHEELS , POROUS MATERIALS , GRINDING WHEELS , ILLUMINATION , CERAMIC COATINGS , SURFACE PROPERTIES


Subject Categories : Inorganic Chemistry
      Geology, Geochemistry and Mineralogy
      Photography


Distribution Statement : APPROVED FOR PUBLIC RELEASE