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Title: Microstructural studies of coal and carbonaceous mixtures using differential interference-contrast microscopy

Abstract

The need for obtaining increased microstructural information from optical microscopy of coals and carbonaceous mixtures led to the present study in which the use of Differential Interference Contrast (DIC) microscopy was investigated. The three-dimensional quality conveyed to the micrographs through DIC reveals the order of hardness of the individual organic constituents. In addition, the nature of the cellular structure of semi-fusinites are more clearly identified by using DIC. Furthermore, visually observable contrast between carbonized coal fragments and semicoke formed in coal conversion systems was observable under DIC conditions, whereas in bright field conditions, these constituents are nearly indistinguishable. The results of this study suggest that DIC microscopy should be used routinely in studies of complex microstructures.

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
6244686
Report Number(s):
CONF-780732-6
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Conference
Resource Relation:
Conference: Metallographic Society Technical conference, Montreal, Canada, 16 Jul 1978
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CARBONACEOUS MATERIALS; OPTICAL MICROSCOPY; COAL; PETROLOGY; ENERGY SOURCES; FOSSIL FUELS; FUELS; GEOLOGY; MICROSCOPY; 010600* - Coal, Lignite, & Peat- Properties & Composition

Citation Formats

Harris, L. A., and Rouse, N. H. Microstructural studies of coal and carbonaceous mixtures using differential interference-contrast microscopy. United States: N. p., 1978. Web.
Harris, L. A., & Rouse, N. H. Microstructural studies of coal and carbonaceous mixtures using differential interference-contrast microscopy. United States.
Harris, L. A., and Rouse, N. H. Sun . "Microstructural studies of coal and carbonaceous mixtures using differential interference-contrast microscopy". United States. https://www.osti.gov/servlets/purl/6244686.
@article{osti_6244686,
title = {Microstructural studies of coal and carbonaceous mixtures using differential interference-contrast microscopy},
author = {Harris, L. A. and Rouse, N. H.},
abstractNote = {The need for obtaining increased microstructural information from optical microscopy of coals and carbonaceous mixtures led to the present study in which the use of Differential Interference Contrast (DIC) microscopy was investigated. The three-dimensional quality conveyed to the micrographs through DIC reveals the order of hardness of the individual organic constituents. In addition, the nature of the cellular structure of semi-fusinites are more clearly identified by using DIC. Furthermore, visually observable contrast between carbonized coal fragments and semicoke formed in coal conversion systems was observable under DIC conditions, whereas in bright field conditions, these constituents are nearly indistinguishable. The results of this study suggest that DIC microscopy should be used routinely in studies of complex microstructures.},
doi = {},
url = {https://www.osti.gov/biblio/6244686}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Conference:
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