The microstructure and microchemistry of a thermal-diffusion-boronized Co-Cr-W-C alloy
| Autor: | G.G. Peterson, C.V. Cooper |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Auger electron spectroscopy
Materials science Scanning electron microscope Metallurgy Alloy Analytical chemistry chemistry.chemical_element Surfaces and Interfaces General Chemistry Substrate (electronics) engineering.material Condensed Matter Physics Microstructure Surfaces Coatings and Films Carbide X-ray photoelectron spectroscopy chemistry Materials Chemistry engineering Boron |
| Zdroj: | Surface and Coatings Technology. :756-767 |
| ISSN: | 0257-8972 |
| Popis: | The microstructural and microchemical properties of a commercially produced, diffusion-boronized layer deposited over a wrought Co-Cr-W-C alloy have been investigated using several analytical techniques, including scanning electron microscopy, Auger electron spectroscopy, X-ray photoelectron spectroscopy and rotating-anode X-ray diffraction. Application of these analytical techniques revealed the presence of a complex and compositionally graded coating consisting of at least three distinct regimes: (1) an outer region containing either pure boron and/or B 4 C, (2) an intermediate region comprised of several probable stoichiometries, constituents and crystal structures, and (3) a rather diffuse and dilute, boron-containing transition region between the coating and the substrate. X-ray diffraction techniques suggest that the compounds of CrB and Co 2 B were present in significant concentrations. Furthermore, chromium-rich M 7 C 3 carbides which resided in the boronized region were found to transform during the diffusion process into a borocarbide compound, quite probably having the Cr 7 BC 4 stoichiometry. |
| Databáze: | OpenAIRE |
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