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Abstract

In the cosintering process to fabricate a multi-layered ceramic functionally graded material (FGM), the difference in the sintering behaviors among the layers can cause cracks or camber to form. One way to reduce the likelihood of cracks or camber in the FGM is to use powders with similar transient densification kinetics for a given set of sintering conditions. In this study, the densification kinetics characteristics of several alumina powder mixtures and zirconia powder mixtures were investigated using a thermomechanical analyzer (TMA). By comparing the densification data for the alumina and zirconia powder mixtures, a set of mixtures that exhibits a similar transient densification kinetics was found. Using this set of powders, a three-layered alumina/alumina+zirconia/ zirconia FGM was successfully fabricated without cracks or camber.

Keywords

functionally graded material densification rate relative density cosintering.

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References

Richerson, D.W. (2004). Chapter 2: Advanced Ceramic Materials, In: Wessel, J.K. (ed.), The Handbook of Advanced Materials: Enabling New Designs, pp. 65-89, Wiley Interscience, Hoboken, NJ.

Chan, H.M. (1997). Layered Ceramics: Processing and Mechanical Behavior, Annu. Rev. Mater. Sci., 27: 249-282.

Kieback, B. , Neubrand, A. and Riedel, H. (2003). Processing Techniques for Functionally Graded Materials, Mater. Sci. Eng. A, 362(1-2): 81-106.

Dynys, F.W. and Halloran J.W. (1984). Influence of Aggregates on Sintering, J. Am. Ceram. Soc., 67(9): 596-601.

Ting, J.M. and Lin, R.Y. (1994). Effect of Particle Size Distribution on Sintering: Part I Modeling, J. Mater. Sci., 29(7): 1867-1872.

Ting, J.M. and Lin, R.Y. (1995). Effect of Particle Size Distribution on Sintering: Part II Sintering of Alumina, J. Mater. Sci., 30(9): 2382-2389.

Legros, C. , Carry, C. , Bowen, P. and Hofmann, H. (1999). Sintering of a Transition Alumina: Effects of Phase Transformation, Powder Characteristics and Thermal Cycle, J. Eur. Ceram. Soc., 19(11): 1967-1978.

Smothers, W.J. and Reynolds, H.J. (1954). Sintering and Grain Growth of Alumina, J. Am. Ceram. Soc., 37(12): 588-595.

Zhao, J. and Harmer, M.P. (1992). Effect of Pore Distribution on Microstructure Development: III, Model Experiments, J. Am. Ceram. Soc., 75(4): 830-843.

10.

Hillman, C. , Suo, Z. and Lange, F.F. (1996). Cracking of Laminates Subjected to Biaxial Tensile Stresses, J. Am. Ceram. Soc. , 79(8): 2127-2133.

11.

Cai, P.Z. , Green, D.J. and Messing, G.L. (1997). Constrained Densification of Alumina/ Zirconia Hybrid Laminates, I: Experimental Observations of Processing Defects, J. Am. Ceram. Soc., 80(8): 1929-1939.

12.

Itoh, Y. and Kashiwaya, H. (1992). Residual Stress Characteristics of Functionally Gradient Materials, J. Ceram. Soc. Jpn, 100(4): 476-481.

13.

Lee, Y.D. and Erdogan, F. (1994). Residual/Thermal Stresses in FGM and Laminated Thermal Barrier Coatings, Int. J. Fract. , 69(2): 145-165.

14.

Torrecillas, R. , Espino, A.M. , Bartolomé, J.F. and Moya, J.S. (2000). Functionally Graded Zircon-Molybdenum Materials without Residual Stresses, J. Am. Ceram. Soc., 83(2): 454-456.

15.

Sun, L. , Sneller, A. and Kwon, P. (2008). Fabrication of Alumina/Zirconia Functionally Graded Material: From Optimization of Processing Parameters to Phenomenological Constitutive Models, Mater. Sci. Eng. A, 488(1-2): 31-38

16.

Lance, D. , Valdivieso, F. and Goeuriot, P. (2004). Correlation Between Densification Rate and Microstructural Evolution for Pure Alpha Alumina, J. Eur. Ceram. Soc., 24(9): 2749-2761.

17.

Lange, F.F. (1989). Powder Processing Science and Technology for Increased Reliability, J. Am. Ceram. Soc. , 72(1): 3-15.

18.

Hansen, J.D. , Rusin, R.P. , Teng, M.H. and Johnson, D.L. (1992). Combined-Stage Sintering Model, J. Am. Ceram. Soc., 75(5): 1129-1135.

19.

Su, H. and Johnson, D.L. (1996). Master Sintering Curve: a Practical Approach to Sintering, J. Am. Ceram. Soc., 79(12): 3211-3217.

20.

Rahaman, M.N. , De Jonghe, L.C. and Chu, M.Y. (1991). Effect of Green Density on Densification and Creep During Sintering, J. Am. Ceram. Soc., 74(3): 514-519.

21.

Trunec, M. and Maca, K. (2007). Compaction and Pressureless Sintering of Zirconia Nanoparticles, J. Am. Ceram. Soc., 90(9): 2735-2740.

Powder Selection in Cosintering Multi-layered Ceramic Functionally Graded Materials Based on the Densification Kinetics Curves

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