POWDER INJECTION MOLDING OF SIC FOR THERMAL MANAGEMENT
Onbattuvelli, Valmikanathan; Laddha, Sachin; Park, Seong-Jin; Souza, Jupiter Palagi de; Atre, Sundar Vedanarayan
http://dx.doi.org/10.4322/tmm.2012.019
Tecnol. Metal. Mater. Min., vol.9, n2, p.123-131, 2012
Abstract
Silicon carbide (SiC) exhibits many functional properties that are relevant to applications in electronics, aerospace, defense and automotive industries. However, the successful translation of these properties into final applications lies in the net-shaping of ceramics into fully dense microstructures. Increasing the packing density of the starting powders is one effective route to achieve high sintered density and dimensional precision. The present paper presents an in-depth study on the effects of nanoparticle addition on the powder injection molding process (PIM) of SiC powder-polymer mixtures. In particular, bimodal mixtures of nanoscale and sub-micrometer particles are found to have significantly increased powder packing characteristics (solids loading) in the powder-polymer mixtures. The influence of nanoparticle addition on the multi-step PIM process is examined. The above results provide new perspectives which could impact a wide range of materials, powder processing techniques and applications.
Keywords
Powder injection molding, Nanoparticles, Thermal management, SiC
Referências
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2 ONBATTUVELLI, V. P. et al. Properties of SiC and AlN feedstocks for the powder injection moulding of thermal management devices . PIM International, v. 4, n. 3, p. 64-70, Sep. 2010.
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4 BAKAN, H. I. Injection moulding of alumina with partially water soluble binder system and solvent debinding kinetics. Materials Science and Technology, v. 23, n. 7, p. 787-91, July 2007. http://dx.doi. org/10.1179/174328407X161196
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6 SURNEV, S.; LEPKOVA, D.; YOLEVA, A. Influence of the sintering additives on the phase composition and the thermal conductivity of aluminium nitride ceramics. Materials Science and Engineering B, v. 10, n. 3, p. 35-40, 1991. http://dx.doi.org/10.1016/0921-5107(91)90092-A
7 MOLISANI, A. L. et al. Effects of CaCO3 content on the densification of aluminum nitride. Journal of the European Ceramic Society, v. 26, n. 15, p. 3431-40, 2006. http://dx.doi.org/10.1016/j.jeurceramsoc.2005.08.010
8 GERMAN, R. M. Sintering theory and practice. New York: John Wiley and Sons, 1996.
9 ZHOU, H. et al. Effects of binary additives B2O3–Y2O3 on the microstructure and thermal conductivity of aluminum nitride ceramics. Journal of Materials Science, v. 34, n. 24, p. 6165-8, Dec. 1999. http://dx.doi. org/10.1023/A:1004782223271
10 LI, X. L. et al. AlN ceramics prepared by high-pressure sintering with La2O3 as a sintering aid. Journal of Alloys and Compounds, v. 463, n. 1-2, p. 412-6, Sep. 2008. http://dx.doi.org/10.1016/j.jallcom.2007.09.050
11 KUME, S. et al. Effects of annealing on dielectric loss and microstructure of aluminum nitride ceramics Journal of American Ceramic Society, v. 88, n. 11, p. 3229-31, Nov. 2005. http://dx.doi.org/10.1111/j.1551-2916.2005.00556.x
12 ONBATTUVELLI, V. P.; ATRE, S. V. Review of net shape fabrication of thermally conducting ceramics. Materials and Manufacturing Processes, v. 26, n.11, p. 832-45, 2011. http://dx.doi.org/10.1080/10426914.2010.515646
2 ONBATTUVELLI, V. P. et al. Properties of SiC and AlN feedstocks for the powder injection moulding of thermal management devices . PIM International, v. 4, n. 3, p. 64-70, Sep. 2010.
3 DABAK, T.; YUCEL, O. Shear viscosity behavior of highly concentrated suspensions at low and high shear-rates. Rheologica Acta, v. 25, n. 5, p. 527-33, Sep. 1986. http://dx.doi.org/10.1007/BF01774404
4 BAKAN, H. I. Injection moulding of alumina with partially water soluble binder system and solvent debinding kinetics. Materials Science and Technology, v. 23, n. 7, p. 787-91, July 2007. http://dx.doi. org/10.1179/174328407X161196
5 HWANG, K. S.; SHU, G. J.; LEE, H. J. Solvent debinding behavior of powder injection molded components prepared from powders with different particle sizes. Metallurgical and Materials Transactions A, v. 36, p.161-7, Jan. 2005. http://dx.doi.org/10.1007/s11661-005-0148-6
6 SURNEV, S.; LEPKOVA, D.; YOLEVA, A. Influence of the sintering additives on the phase composition and the thermal conductivity of aluminium nitride ceramics. Materials Science and Engineering B, v. 10, n. 3, p. 35-40, 1991. http://dx.doi.org/10.1016/0921-5107(91)90092-A
7 MOLISANI, A. L. et al. Effects of CaCO3 content on the densification of aluminum nitride. Journal of the European Ceramic Society, v. 26, n. 15, p. 3431-40, 2006. http://dx.doi.org/10.1016/j.jeurceramsoc.2005.08.010
8 GERMAN, R. M. Sintering theory and practice. New York: John Wiley and Sons, 1996.
9 ZHOU, H. et al. Effects of binary additives B2O3–Y2O3 on the microstructure and thermal conductivity of aluminum nitride ceramics. Journal of Materials Science, v. 34, n. 24, p. 6165-8, Dec. 1999. http://dx.doi. org/10.1023/A:1004782223271
10 LI, X. L. et al. AlN ceramics prepared by high-pressure sintering with La2O3 as a sintering aid. Journal of Alloys and Compounds, v. 463, n. 1-2, p. 412-6, Sep. 2008. http://dx.doi.org/10.1016/j.jallcom.2007.09.050
11 KUME, S. et al. Effects of annealing on dielectric loss and microstructure of aluminum nitride ceramics Journal of American Ceramic Society, v. 88, n. 11, p. 3229-31, Nov. 2005. http://dx.doi.org/10.1111/j.1551-2916.2005.00556.x
12 ONBATTUVELLI, V. P.; ATRE, S. V. Review of net shape fabrication of thermally conducting ceramics. Materials and Manufacturing Processes, v. 26, n.11, p. 832-45, 2011. http://dx.doi.org/10.1080/10426914.2010.515646
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