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Nanopowder dispersion and spray-drying process: the case of Cr2O3

  • Audrey Cellard , Rachid Zenati , Vincent Garnier , Gilbert Fantozzi and Guy Baret
Published/Copyright: May 31, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 97 Issue 5

Abstract

The work reported in this paper was performed in order to develop and to optimize the dispersion of Cr2O3 nanopowders by a ball-milling method and to produce spherical micrometer-sized granules by spray-drying. The targeted application for such granules is the development of wear resistant nanostructured Cr2O3 coatings by plasma spraying. Cr2O3 nanopowders were dispersed in deionized water. The suitable dispersant (DarvanC) was determined by zeta potential measurements and the dispersant quantity was optimized by rheological tests. The influence of milling time, diameter of milling balls and weight ratio of milling balls to powder was studied by granulometric measurements. A well-dispersed and stable suspension was then obtained and spray-dried. Dense and spherical micrometer-sized granules, with a monodispersed distribution centered about 50μm, have been achieved and Cr2O3 plasma-sprayed coatings have been realized.

Keywords: Milling; Suspensions; Cr2O3; Nanopowder; Spray-drying
* Correspondence address: Audrey Cellard, Insa Lyon, Bâtiment Blaise Pascal, GEMPPM, 5ème étage, 20 avenue Albert Einstein, 69621 Villeurbanne Cedex, France, Tel.: +33472436239, Fax: +33472438528. E-mail:

Dedicated to Professor Dr. Fritz Aldinger on the occasion of his 65th birthday

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Received: 2005-11-3
Accepted: 2006-2-7
Published Online: 2013-05-31
Published in Print: 2006-05-01

© 2006, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101282
Keywords for this article
Milling; Suspensions; Cr2O3; Nanopowder; Spray-drying

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. Three-dimensional printing of TiAl3/Al2O3 composites
  7. Microemulsion mediated synthesis of nanocrystalline BaTiO3: possibilities, potential and perspectives
  8. Solid-State 17O NMR studies on Yttria-stabilized zirconia
  9. Twinning in ultrathin silicon nanowires
  10. Re-optimization of the Mg–Sb system under topological constraints
  11. Mg-rich phase equilibria of Mg–Mn–Zn alloys analyzed by computational thermochemistry
  12. The In–Pt–Sb phase diagram
  13. Thermodynamic evaluation of the Al–Cr–C system
  14. Thermodynamic description of the Ni–Si–Ti ternary system
  15. Enthalpies of formation measurements and thermodynamic description of the Ag–Cu–Zn system
  16. Thermodynamic assessment of the Mn–Cr–O system for solid oxide fuel cell (SOFC) materials
  17. Subsolidus phase equilibria in the CeO2−x–SiO2–ZrO2 system: An experimental study
  18. Generalized Maugis–Dugdale model of an elastic cylinder in non-slipping adhesive contact with a stretched substrate
  19. Implications of linear relationships between local and macroscopic flow stresses in the composite model
  20. Applied
  21. Gas-phase surface alloying under “kinetic control”: A novel approach to improving the surface properties of titanium alloys
  22. Thin film formation by oriented attachment of polymer-capped nanocrystalline ZnO
  23. The sintering mechanism and microstructure evolution in SiC–AlN ceramics studiedby EFTEM
  24. Thermal evolution of free volumes and of crystallization in amorphous Si–B–C–N ceramics
  25. High-temperature deformation behavior of nanocrystalline precursor-derived Si–B–C–N ceramics in controlled atmosphere
  26. Nanopowder dispersion and spray-drying process: the case of Cr2O3
  27. Electroless deposition of brushite (CaHPO4 · 2H2O) crystals on Ti–6Al–4V at room temperature
  28. The role of chemisorbed anions in the aqueous processing of AlN powder
  29. The influence of porosity on the electrical properties of liquid-phase sintered silicon carbide
  30. Development of high-temperature thermoelectric materials based on SrTiO3-layered perovskites
  31. The influence of the preparation method on the microstructure and properties of Al2O3/TiN nanocomposites
  32. Infrared properties of sintered α-MnSe
  33. Quasi-equilibrium sintering of particle clusters containing Bernal holes
  34. Design of metal ceramic composites
  35. Notifications
  36. DGM News
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