Accession Number : AD0671925

Title :   CHEMICAL TINTING OF HAFNIUM AND ZIRCONIUM CARBIDES FOR METALLOGRAPHIC EXAMINATION,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Joyce,Robert L. ; Janowski,Kenneth R. ; Richardson,James H.

Report Date : NOV 1967

Pagination or Media Count : 13

Abstract : An etchant is described that imparts color to the surface of hafnium and to zirconium carbide metallographic specimens. These colors not only provide a sharp delineation of individual grains, but also define the boundaries of eutectic colonies that contain both graphite and carbide. For a given specimen, similar orientations of grains may be inferred from similar coloration. (Author)

Descriptors :   (*HAFNIUM COMPOUNDS, ETCHING), (*ZIRCONIUM COMPOUNDS, ETCHING), (*CARBIDES, *ETCHING), METALLOGRAPHY, EUTECTICS, SOLID SOLUTIONS, CARBON ALLOYS, GRAPHITE, COLORS, GRAIN STRUCTURES(METALLURGY), NITRIC ACID, HYDROGEN COMPOUNDS, FLUORIDES

Subject Categories : Coatings, Colorants and Finishes
      Metallurgy and Metallography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE