| Autor: | J. M. Missiaen, V. Chabretou, C. H. Allibert |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Metal matrix composite Analytical chemistry chemistry.chemical_element Mineralogy Cermet Microstructure Grain growth chemistry.chemical_compound chemistry Mechanics of Materials Tungsten carbide Phase (matter) General Materials Science Cobalt |
| Zdroj: | Journal of Materials Science. 38:2581-2590 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1024418131674 |
| Popis: | Microstructural evolution of WC-Co materials with different compositions and WC grain sizes is discussed from SEM observations and quantitative image analyses of intercept length distributions in the WC phase. Effect of the C/W ratio in the binder phase and of V- or Cr-dopants is particularly studied. Microstructural coarsening is shown to be more rapid and less abnormal when the C/W ratio is increased in the two-phase field {WC + liquid} and up to the three-phase field {WC + C + liquid}. The V-dopant does not completely suppress this effect. The composition dependence of the liquid stability—analysed from the calculated Gibbs energies of the phases—could explain the trend of the experimental results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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