[article]
| Titre : |
Capillary flow of hard-metal carbide powder compounds |
| Type de document : |
texte imprimé |
| Auteurs : |
B. Hausnerova, Auteur ; P. Saha, Auteur ; J. Kubát, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 254-260 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Experimental data relating to capillary flow of hard-metal carbide powders compounded with various polymeric binders are presented. Such powder - binder mixtures are used for the production of sintered hard-metal carbide components, mainly by injection moulding. In addition to measurements of their rheological behaviour in a capillary rheometer, the compounds were also subjected to thermo-gravimetric analysis in order to assess the ability of the binder to debind properly. The binder composition was varied from paraffin wax and its combinations with polyethyleneglycols to multi-component binders consisting of polyethyleneglycol, polyethylene, ethylene/vinyl acetate copolymer, and paraffin wax. Two kinds of hard-metal carbide powders differing in particle size distribution (uni-modal, bi-modal) were used. Although the compounds containing the simpler binder types had acceptable flow properties, their debinding behaviour was unsatisfactory. The multi-component compounds exhibited considerably better debinding; their flow was stable within a wide range of shear rates. Flow instabilities appearing at high solids loadings can limit the processability of the compounds used. |
| DOI : |
10.3139/217.1556 |
| En ligne : |
https://drive.google.com/file/d/1c6uOA8iP5bmYr3V6Ofu9LYtervcxXaOt/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16136 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XIV, N° 3 (09/1999) . - p. 254-260
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