Abstract
The rheological properties (flow curves and viscoelastic behavior) of injection molding suspensions of a plasma-processed AlN nanosized powder (nanopowder) in paraffin are investigated over a broad range of shear rates (0.07–1350 s−1). Two viscosity plateaux are observed on the flow curves and two values of the yield stress are obtained. The lower value of the strain amplitude (0.66%), exceeding the linearity limit of periodic shear, is restricted by the rheometer resolution. The ultrasound treatment and shear deformation of suspensions affect the structure of particle packing, which is responsible for the dependence of their rheological properties on the prehistory of mechanical actions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
K. Kubo, K. Itatani, F. S. Howell, A. Kishioka, and M. Kinoshita, “Some properties of aluminum-nitride powder prepared by metal-organic chemical vapour deposition,” J. Europ. Ceram. Sci., 15, 661–666 (1995).
E. Palcevskis, “Ceramics from fine plasma processed AlN powder,” in: Materials Engineering-98. Mater. VII Int. Baltic Conf., Riga (1998), pp. 30–35.
R. M. German, R. F. Hens, and S.-T. P. Lin, “Key issues in powder injection molding,” Am. Ceram. Soc. Bull., 70, No. 8, 1294–1302 (1991).
R. M. German and A. Bose, Injection Molding of Metals and Ceramics, Metal Powder Industries Federation, Priceton (1997).
Z. Zupancic, R. Lapasin, and A. Kristoffersson, “Influence of particle concentration on rheological properties of aqueous α-Al2O3 suspensions,” J. Europ. Ceram. Soc., 18, 467–477 (1998).
M. G. Tsiprin and L. A. Faitel'son, “Nonlinear periodic deformation of thixotropic media,” Polym. Mech., 8, No. 4, 595–600 (1972).
J. L. Harden and M. Doi, “The effect of added triblock copolymer on the nonlinear rheology of ordered diblock copolymer mesophasis,” J. Rheol., 40, 187–197 (1996).
M. K. Chow and C. F. Zukoski, “Nonequilibrium behavior of dense suspensions of uniform particles: Volume fraction and size dependence of rheology and microstructure,” J. Rheol., 39, No. 1, 33–59 (1995).
T. C. Lubensky and P. A. Pincus, “Superpolymers, ultraweak solids and aggregates,” Physics Today, No. 10, 44 (1984).
J. D. Ferry, Viscoelastic Properties of Polymers, John Wiley & Sons, New York (1970).
R. Lapasin and S. Pricl, Rheology of Industrial Polysaccharides: Theory and Applications, Plackie Academic & Professional, London (1995).
R. Umeya and S. Tanifuji, “Flow properties of some suspending systems,” Rheologica Acta, 13, 681–688 (1974).
B. J. Ackerson and P. N. Pusey, “Shear induced order in suspensions of hard spheres,” Phys. Rev. Lett., 61, 1033–1036 (1988).
M. K. Chow and C. F. Zukoski, “Gap size and shear history dependencies in shear thickening of a suspension ordered of rest,” J. Rheol., 39, No. 1, 15–32 (1995).
B. V. Vinogradov and A. Ya. Malkin, Rheology of Polymers [in Russian], Mir, Moscow (1980).
P. Gao, Chan Chi-Kwong, and C. K. Chai, “Effect of TLCP inclusion on the flow behavior of high molecular mass polyethylene,” in: Proc. XIII Int. Congr. Rheology, Cambridge, August 2000. Vol. 1 (2000), pp. 136–138.
C. D. Han, Multiphase Flow in Polymer Processing, Academic Press, New York (1981).
L. A. Faitel'son and E. E. Yakobson, “Rheology of filled polymers. Steady-state shear flow and periodic deformation. 1. Relaxation time spectra. Viscosity,” Polym. Mech., 13, No. 6, 898–906 (1977).
L. E. Silbert, J. R. Melrose, and R. C. Ball, “The rheology and microstructure of concentrated, aggregated colloids,” J. Rheol., 43, No. 3, 673–700 (1999).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Palcevskis, E., Jakobsons, E. & Faitel'son, L. Rheological Properties of Nanosized AlN Powder Suspensions for Advanced Ceramics. Mechanics of Composite Materials 36, 501–508 (2000). https://doi.org/10.1023/A:1006766802274
Issue Date:
DOI: https://doi.org/10.1023/A:1006766802274