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HomeMaterials Science ForumMaterials Science Forum Vols. 498-499Comparison of Physical and Mechanical Properties...

Comparison of Physical and Mechanical Properties in Ceramics Composites Si₃N₄–CTR–AlN and Si₃N₄–Y₂O₃–AlN

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Abstract:

The important factor to consider for successful ceramics composites development is the need of matching the whiskers and matrix characteristics, taking into account the chemical compatibility of the sintering aids utilized. The purpose of this work was to analyze and compare use of rare earth concentrate (CTR) and yttrium oxide, as sintering aids, and its influence in the densification and physical/mechanical properties of hot pressed and sintered Si3N4-SiC(w). The CTR powder materials present high yttrium oxide percentage and its production is cheaper than the additives usually used in ceramic materials, such as Y2O3. For physical and mechanical properties evaluation, specific mass, crystalline phases, micrographs analysis, microhardness and fracture toughness were measured, showing similar results between the two sintering aids. Therefore, this study shows the possibility of obtaining low processing cost products with the use of rare earth concentrate. Meanwhile, more characterization steps are necessary for analyzing its behavior at elevated temperatures.

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Advanced Powder Technology IV

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Materials Science Forum (Volumes 498-499)

Pages:

381-387

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.498-499.381

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Online since:

November 2005

Authors:

Sandro Aparecido Baldacim, Olivério Moreira Macedo Silva, Claudinei dos Santos, Cosme Roberto Moreira Silva

Keywords:

Mechanical Property, Physical Properties, Rare Earth Concentrate, Yttrium Oxide

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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[1] J.N. Fridlyander, I.H. Marshall, Ceramic and Carbon Matrix-Composites, Ed. Academician V.I. Trefilov - Chapman & Hall. London, (1995).

[2] R. Warren, Ceramic-matrix Composites, Chapman and Hall, New York, (1992).

[3] K.K. Chawla, Ceramic Matrix Composites, Chapman and Hall, New York, (1993).

[4] H. Kodama, T. Suzuki, H. Sakamoto and T. Miyoshi, J. Am. Ceram. Soc. 73.

[3] (1990) 678.

[5] G. Pezzotti, I. Tanaka and T. Okamoto, J. Am. Ceram. Soc. 74(2) (1991) 326.

[6] D. Kim, H. Kim, J. Mater. Sci. Lett. 17 (1998) 541.

[7] G.Y. Lin, T.C. Lei, Ceram. Int 24 (1998) 313.

[8] N. Ekinaga, Characteristics of SiC whisker and their applications, Proceeding Ist. Japan International SAMPE Symposium, 1989, D-28.

[9] M.K. Cinibulk and G. Thomas, J. Am. Ceram. Soc. 75.

[8] (1992) (2037).

[10] V. Sharma, S. Nemat-Nasser, K.S. Vecchio, J. Am. Ceram. Soc. 81.

[1] (1998) 129.

[11] D.C. Jia, Y. Zhou and T.C. Lei, Ceram. Intern. 22 (1996) 107.

[17] P.D. Shalek, J.J. Petrovic, G.F. Hurley and F.D. Gac, Am. Ceram. Soc. Bull. 65.

[2] (1990) 351.

[12] W. Kai, J. Mater. Sci. 27 (1992) 3706.

[13] S.A. Baldacim, O .M.M. Silva, C.R.M. Silva, Proceedings of the Second International LatinAmerican Conference on Powder Technology, Foz do Iguaçu/PR, Brasil, November 1-12, p.35, (1999).

[14] I.R. Ruiz, A.H. Bressiani and J.C. Bressiani, Mater. Sci. Forum, 299-300 (1999) 141.

[15] P. Olsson, T. Ekstrom, J. Mater. Sci. 25 (1990) 1824.

[16] S.A. Baldacim, C.A.A. Cairo, C.R.M. Silva , J. Mater. Proc. Tech. 119 (2001) 273.

[17] O.M.M. Silva, F.C.L. Mello, C.R.M. Silva, Mater. Sci. Eng. A209 (1996) 175.

[18] K. Niihara, R. Morena, D.P. Haasselman, J. Mater. Sci. Lett. 1 (1982) 13.

[19] S.S. Kim and S. Baik, J. Am. Ceram. Soc. 74.

[7] 1991 1735.

[20] T.N. Tiegs and D.M. Dillard, J. Am. Ceram. Soc. 73.

[5] (1990) 1440.

[21] H. Klemm, M. Herrmasnn, T. Reich and C. Schubert, J. Am. Ceram. Soc., 81.

[5] (1998) 1141.

[22] W.E. Lee and W.M. Rainforth, Ceramics microstructures: Property Control by Processing, Chapman and Hall, London, (1994).

[23] T. A. Ring, Fundamentals of Ceramics Powder Processing and Synthesis, Academic Press Inc. London, (1996).

[24] J.B. Wachtman, Mechanical Properties of Ceramics, John Wiley & Sons Inc., New York, (1996).

[25] R.W. Rice, Ceram. Eng. Sci. Proc. 2[7-8] (1981) 661.

[26] D.K. Shetty, Ceramic Matrix Composites, Current Awareness Bulletin, N o '118, Metals and Ceram. Ing. Center, Columbus, OH, (1982).

[27] S. M. Smith, J.P. Singh, R.O. Scattergood, J. Am. Ceram. Soc. 76.

[2] (1993) 497.

[28] H. Xiao, X. Ai and H.S. Yang, Mater. Sci. and Techn. 9 (1993) 21.

[29] T. Hanson, R. Warren and J. Wasen, J. Am. Ceram. Soc. 76.

[4] (1993) 841.