Abstract
The oxidative and thermal degradation of nine suspensions, with polypropylene as the main organic component and a fixed silicon powder loading, were studied by thermogravimetry. Samples were in the form of finely divided shavings and moulded bodies. The acceleration of weight loss in oxidizing atmospheres was dependent on sample size, indicating oxygen diffusion control. Minor additions in the formulations exerted considerable influence on the form of the thermograms. Samples heated in nitrogen presented an exfoliated skin defect which did not appear in oxidizing atmospheres. An important observation was that the form of the thermogram could not be directly related to the incidence of defects in the powder assembly and was therefore an incomplete guide in the screening of potential blends. Nevertheless, a low temperature dependence of weight loss was shown to be desirable for process control.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. J. Edirisinghe andJ. R. G. Evans,Int. J. High Tech. Ceram. 2 (1986) 1.
Idem. ibid. 2 (1986) 249.
Idem. Br. Ceram. Trans. J. 86 (1987) 18.
Idem. J. Mater. Sci. 22 (1987) 269.
Idem. ibid. 22 (1987) 2267.
B. C. Mutsuddy, in Proceedings of the International Conference on Non-Oxide Technological and Engineering Ceramics (N.I.H.E. Limerick, July 1985).
A. Johnsson, E. Carlstrom, E. Hermansson andR. Carlsson,Proc. Brit. Ceram. Soc. 33 (1983) 139.
C. D. Doyle, in “Techniques and Methods of Polymer Evaluation I. Thermal Analysis”, edited by P. E. Slack and L. T. Jenkins (Marcel Dekker, New York, 1966) p. 152.
R. H. Hansen, in “Thermal Stability of Polymers”, edited by R. T. Conley, Vol. 1 (Marcel Dekker, New York, 1970) p. 153–187.
J. K. Wright, M. J. Edirisinghe andJ. R. G. Evans, to be published.
J. K. Y. Kiang, P. C. Uden andJ. C. W. Chien,Polymer Degradation & Stability 2 (1980) 113.
J. Szekely, J. W. Evans andH. Y. Sohn, “Gas-Solid Reactions”, (Academic Press, London, 1976) Ch. 4.
R. M. German,Int. J. Powder Met. 23 (1987) 237.
E. S. Freeman andB. Carroll,J. Phys. Chem. 62 (1958) 394.
L. Reich andD. W. Levi,Macromolecular Reviews 1 (1967) 173.
W. W. Wendlandt, Thermal Methods of Analysis, Interscience (1964) p. 32.
L. A. Wall, in “Analytical Chemistry of Polymers II Molecular Structure and Chemical Groups”, edited by G. M. Kline (Wiley, New York, 1962) p. 194.
S. Stivala, J. Kimira andL. Reich, in “Degradation and Stabilization of Polymers I”, edited by H. H. G. Jellinek (Elsevier, New York, 1983) p. 35.
J. K. Wright, M. J. Edirisinghe andJ. R. G. Evans, to be published.
“Injection Moulding Machine for New Ceramics”, Japan Steel Works (Hiroshima plant), Trade Literature, 1984.
R. Gilissen andA. Smolders, “High Tech Ceramics”, Mater. Sci. Monograph 38A, edited by P. Vincengini (Elsevier, 1987) p. 591.
J. G. Zhang, M. J. Edirisinghe andJ. R. G. Evans, to be published.
C. L. Quackenbush, K. French andJ. T. Neil,Ceram. Eng. Sci. Proc. 3 (1982) 20.
I. C. McNeill,European Polym. J. 6 (1970) 373.
J. G. Zhang, M. J. Edirisinghe andJ. R. G. Evans,Industrial Ceramics, in press.
K. Saito, T. Tanaka andT. Hibino, UK Patent 1426317, March 1973.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Woodthorpe, J., Edirisinghe, M.J. & Evans, J.R.G. Properties of ceramic injection moulding formulations. J Mater Sci 24, 1038–1048 (1989). https://doi.org/10.1007/BF01148795
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01148795