Abstract
Significant dimensional changes involving linear expansion and shrinkage of 6% occur during heating of a thermoplastic SiC/ethylene vinyl acetate (EVA) mixture. Thermal expansion occurs before weight loss begins, and can be quantitatively explained in terms of the thermal expansion behaviour of the constituents and the crystallization or melting of the semicrystalline polymer. Irreversible anisotropic displacements occur during the first heating cycle due to relaxation of moulding strains. These can be reduced by annealing for periods comparable to the viscoelastic relaxation of the ceramic/polymer system. Shrinkage occurs during the early stages of degradation of EVA. This shrinkage is quantitatively accounted for with volume losses resulting from removal of the EVA. Shrinkage continues as weight loss proceeds and stops only at the point the ceramic particles contact one another. Total displacement behaviour is the sum of the shrinkage from weight loss plus the expansion from thermal expansion of the individual components, and can be quantitatively predicted for simple or multi-step heating schedules.
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T ZHANG and J. R. G. EVANS, J. Mater. Sci. Lett. 9 (1990) 672.
M. J. EDIRISINGHE and J. R. G. EVANS, J. Mater. Sci. 22 (1987) 2267.
M. TRUNEC and J. CIHLAR, J. Eur. Ceram. Soc. 17 (1997) 203.
J. K. WRIGHT, M. J. EDIRISINGHE, J. G. ZHANG and J. R. G. EVANS, J. Am. Ceram. Soc. 73 (1990) 2653.
M. A. MULLA and V. D. KRSTIC, J. Mater. Sci. 29 (1994) 934.
DO-HYEONG KIM and CHONG HEE KIM, J. Am. Ceram. Soc. 73 (1990) 1431.
K. E. HRDINA in “Phenomena During Thermal Removal of Binders”, PhD thesis, University of Michigan, (1997) p. 186.
K. E. HRDINA, J. W. HALLORAN, M. KAVIANY, and A. M. OLIVEIRA, J. Mater. Sci. in press.
U. S. RAMELOW and N. GUIDRY, Microchem. J. 50 (1994) 57.
N. E. CLOUGH, R. W. RICHARDS and T. IBRAHIM, Polymer 35 (1994) 1044.
O. OLABISI, L. M. ROBESON and M. T. SHAW, in “Polymer--Polymer Miscibility”, (Academic Press, NY, 1979) p. 182.
Y. S. LIPATOV, in “Physical Chemistry of Filled Polymers”, (International Polymer Science and Technology Monograph No. 2, translated from Russian by R. J. Moseley, 1979) p. 41.
R. H. PERRY, D. W. GREEN, and J. O. MALONEY, in “Perry's Chemical Engineering Handbook”, 6th Edn, (McGraw-Hill, NY, 1984) p. 9.
W. F. BLAND and R. L. DAVIDSON, in “Petroleum Processing Handbook”, (McGraw-Hill Book Company, NY, 1967) p. 12.
Penrico Product Bulletin for Drakeol 35 Heavy Mineral Oil.
L. E. NIELSEN, and R. F. LANDEL, in “Mechanical Properties of Polymers and Composites”, 2nd Edn, (Marcel Dekker, NY, 1994) pp. 109, 384 and 64.
N. J. MILLS, J. Appl. Polym. Sci. 15 (1971) 2791.
N. S. ENIKOLOPYAN, M. L. FRIDMAN, I. O. STALNOVA and V. L. POPOV, in “Filled Polymers I Science and Technology”, N. S. Enikolopyan, (Springer-Verlag, NY, 1990) p. 1.
J. L. KOENIG, and C.-H. CHIANG, The Role of the Polymeric Matrix in the Processing and Structural Properties of composite Materials, edited by J. Seferis, and L. Nicolais, (Plenum Press, New York, 1983) p. 503.
G. W. SCHERER, Ceram. Trans. 12, in “Ceramic Powder Science III”, edited by G. L. Messing and H. H. Technische (Am. Ceram. Soc., Inc., Ohio, 1990) p. 561.
G. W. SCHERER, J. Am. Ceram. Soc. 73 (1990) 3.
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Hrdina, K.E., Halloran, J.W. Dimensional changes during binder removal in a mouldable ceramic system. Journal of Materials Science 33, 2805–2815 (1998). https://doi.org/10.1023/A:1017577517999
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DOI: https://doi.org/10.1023/A:1017577517999