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Purpose: The goal of this work is the optimization of sintering process of the ceramic preforms based on Si3N4 and Al2O3-Ti(C,N) materials. The influence of pore forming additives on porosity, microstructures and compressive strength are investigated. The aim of this study is to obtain the nitrides and carbides base preforms material for the infiltration process of molten aluminium alloys. Design/methodology/approach: The method of obtaining the silicon nitride and oxide-carbonitride porous preform for the infitration process is the free sintering process. The preforms were produced by the mixing of ceramic powders with organic binders, drying and sintering. Porosity, density were measured for the materials. Microstructure observation was carried out using scanning microscope. The compressive strength of Si3N4 and Al2O3-Ti(C,N) porous preforms were investigated. Findings: For sintered porous Si3N4 preforms, influence of the porous forming additives on material porosity is observed. Compressive strengths of Si3N4 were in the range of 2.9-4.8 MPa. The highest value of the compressive strength was obtained for Al2O3-Ti(C,N) preform with 8 wt.% of tylose and 25 wt.% of glykol. For these materials compressive strength were in the range of 13.2 up to 14.3 MPa. In spite of lower value of the compressive strength for Si3N4 preforms, this material exhibits high shock thermal resistance. Practical implications: Pressureless infiltration of molten metals into ceramics is the most cost-effective approach to liquid-metal processing of MMCs. Metal matrix composites are applied widely in aircraft production technologies and defence technology. Originality/value: Infiltration of molten metals into porous ceramic preforms is the only technique suitable for the fabrication of high volume fraction of ceramic materials in MMCs. Infiltration process generates thermal stresses in the ceramics preforms. The thermal shock resistance of Al2O3 is lower than Si3N4 or Al2O3-Ti(C,N) materials. New kinds of porous materials were obtained.
Wydawca
Rocznik
Tom
Strony
97--100
Opis fizyczny
Bibliogr. 15 poz.
Twórcy
autor
autor
autor
autor
autor
- Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland, piotr.putyra@ios.krakow.pl
Bibliografia
- [1] C.H. Chen, K. Takita, S. Ishiguro, S. Honda, H. Awaji, Fabrication of porous alumina tube by centrifugal molding, Journal of the European Ceramic Society 25 (2005) 3257-3264.
- [2] PN-EN 623, Advanced technical ceramics - Monolithic ceramics - General and textural properties - Part 2: Determination of density and porosity, 2001.
- [3] M. Cholewa, J. Gawroński, Z. Ignaszak, Particles in wear resistance aluminium compozites, Proceedings of the 7th Scientific International Conference “Achievements in Mechanical and Materials Engineering”, AMME’98, Gliwice-Zakopane, 1998, 75-80.
- [4] L.A. Dobrzański, M. Kremzer, A. Nagel, Application of pressure infiltration to the manufacturing of aluminium matrix composite materials with defferent reinforcement shape, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 183-186.
- [5] K. Naplocha, A. Janus, J.W. Kaczmar, Z. Samsonowicz, Technology and mechanical properties of ceramic preforms for composite materials, Journal of Materials Processing Technology 106 (2000) 119-122.
- [6] K. Konopka, M. Szafran, Ceramic matrix composites with a gradient concentration of metal particles, Materials Engineering 3/4 (2007) 563-566.
- [7] R. Srinivasa, V. Jayaram, Pressureless infiltration of Al-Mg based alloys into Al2O3 preforms: mechanisms and phenomenology, Acta Materialia 49 (2001) 2373-2385.
- [8] I. Sulima, B. Mikułowski, The effect of titanium on the strenght and structure of AlTi6/Al2O3 joint, Materials Engineering 4 (2006) 826-829.
- [9] L.A. Dobrzański, M. Kremzer, A.J. Nowak, A. Nagel, Composite materials based on porous ceramic preform infiltration by aluminium alloy, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 95-98.
- [10] B. Smuk, M. Szutkowska, J. Walter, Alumina ceramics with partially stabilized zirconia for cutting tools, Journal of Materials Processing Technology 133 (2003) 195-198.
- [11] O.P. Hugh ‘Handbook of Refractory Carbides and Nitrides, Noyes Publications.- New Jersey: Westwood, 1996, 223.
- [12] E.D. Whitney, Ceramic Cutting Tools, Noyes Publications, New Jersey: Park Ridge, 1994.
- [13] Z. Trojanova, Z. Szaraz, P. Lukac, Mechanical properties of an AS21 alloy reinforced by short Saffil fibres and SiC particles., Proceedings of the 13th International Scientific Conference “Contemporary Achievements in Mechanics, Manufacturing and Materials Science” CAM3S’2005, Gliwice-Zakopane, 2005, (CD-ROM).
- [14] L.A. Dobrzański, M. Kremzer, K. Gołombek, A. Nagel, Aluminium matrix composites fabricated by pressure infiltration process, Materials Engineering 3/4 (2007) 520-523.
- [15] W. Schatt, K.P. Wieters, Powder Metallurgy. Processing and Materials, EPMA, Old Bank Buildings, Bellstone Shrewsbury, 1997.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0033-0016