CAPÍTULO 05 – CONCLUSÕES
5.1 Sugestões para Trabalhos Futuros
O presente estudo abre a possibilidade para diversos trabalhos futuros, o qual é possível prever algumas caracterizações a serem realizadas para os pós preparados por esta rota.
a) Preparação de outras composições tais como: HMA70%Cu30%, HMA85%Cu15%;
b) Estudar a variação dos parâmetros de moagem na preparaçãos destes pós;
c) O estudo da influencia da compactação nas medições de densidade dos pós e dos corpos sinterizados;
d) Alterar os parâmetros de compactação e de sinterização com objetivo de se obter melhores resultados;
e) Analise de outras propriedades além das mecânicas, como por exemplo: térmicas e elétricas.
REFERÊNCIAS
ALAM, S.N., Synthesis and characterization of W-Cu nanocomposites developed by mechanical alloyoing, Materials Science & Engineering A. A. 433, p. 161-168, 2006.
ANDRADE, M.L.A., VIEIRA, J.R.M., CUNHA, L.M.S., KELLER, M.C., FULDA, R.S. Indústria do cobre - Área de operações industriais. BNDES. 1997.
ARUNACHALAM, V. S.; SUNDARESAN, R. Powder metallurgy. In: CAHN, R. W.; HAASEN P.; KRAMER, E. J. Materals science and technology: a comprehensive treatment. Weinheim, Germany: VCH-Verlagsgesellschatt mbH., 1991, v. 15, cap. 4, p. 138-191.
ASLANOGLU, Z.; KARAKAS, Y,; OVECOGLU, M.L., Switching performance of W-Ag electrical contacts fabricated by mechanical alloying. Int. J. Powder Metallurgy, v. 36, n. 8, p.35-43, 2000.
BAIKALOVA, Y.V.; LOMOVISKY, O.I., Solid state synthesis of tungsten carbide in an inert copper matrix. Journal of alloys and compounds, n. 297, p. 87-91, 2000.
BENJAMIN, J. S. Mechanical Alloying. Scientific American, v. 234, n. 5, p. 40-48, 1976.
BENJAMIN, J.S., Mechanical alloying - A perspective. Metal powder report, v. 45, n. 2, p. 122-127, 1990.
BENJAMIN, J. S.; VOLIN, T. E. Mechanism of mechanical alloying. Metallurgical Transactions, v. 5, p. 1929-1934, 1974.
BOTCHAROVA, E.; FREUDENBERGER, J.; SCHULTZ, L. Mechanical and electrical properties of mechanically alloyed nanocrystalline Cu-Nb alloys. p. 33-41, 2006
BOTCHAROVA, E. et al. Supersaturated solid solution of niobium in copper by mechanical alloying. . J. of Alloys and Compounds., p. 19-25, 2003.
CHARLES JR, H. K. Microelectronic Packaging: Electrical Interconnections. In: EDITORS- IN-CHIEF: , K. H. J. B.;ROBERT, W. C., et al (Ed.). Encyclopedia of Materials: Science and Technology (Second Edition). Oxford: Elsevier, 2001. p.5616-5635. ISBN 978-0-08- 043152-9.
CHEN, W.; KAN, Z.; DING, B. 2005. Preparation and Arc Breakdown Behavior of Nanocrystalline W-Cu Electrical Contact Materials. Journal of Materials Science & Technology, 21:6.
CHIAVERINI, V. Tecnologia Mecânica – Materiais de Construção Mecânica, v. 3, 2. ed., Makron Books, São Paulo, 1986.
CORNEJO, J.; MARTINEZ, V.; ORDONEZ, S. Cu-Mo alloys obtained by mechanical alloying. In: ADVANCED POWDER TECHNOLOGY II, 2000, Foz de Iguaçu. Proceedings of the 2nd International Latin-American Conference on Powder Technology. Foz de Iguaçu, 2001. p. 561-566.
COSTA, F.A., Síntese e sinterização de pós compósitos do sistema W-Cu, Tese de doutorado, IPEN, São Paulo-SP, Brasil, 2004.
COSTA, F. A. Estuda da sinterização de ligas de W-Cu. 2000. p. 171, 2002. Síntese e Sinterização de Pós Compósitos do Sistema W-Cu. p. 195, 2004.
COSTA, F.A.; AMBROZIO FILHO, F.; SILVA, A.G.P., Sintering behavior in solid state of a W-25%wtCu composite powder prepared by mechanical alloying. In: Powder metallurgy world congress, October 17-21, 2004, Vienna. Proceedings of the powder metallurgy world congress, Vienna: EPMA. Aceito para publicação, 2004.
COSTA, F. A.; SILVA, A. G. P.; GOMES, U. U. The influence of the dispersion technique on the characteristics of the W-Cu powder and on the sintering behavior. Powder Technology, v. 134, p. 123-132, 2003.
COSTA, F. A. et al. Efeito da moagem de alta energia e da pressão de compactação na densificação de um pó compósito Nb-20%Cu. 19º Congresso Brasileiro de Engenharia e Ciência dos Materiais, v. 19, p. 3487-3494, 2010.
DA COSTA, C. E.; ZAPATA, W. C.; PARUCKER, M. L. Characterization of casting iron powder from recycled swarf. Journal of Materials Processing Technology, v. 143–144, n. 0, p. 138-143, 2003.
DA COSTA, F. A. et al. Structure and hardness of a hard metal alloy prepared with a WC powder synthesized at low temperature. Materials Science and Engineering: A, v. 485, n. 1–2, p. 638-642, 2008.
DESFORGES, C. D. Sintered materials for electrical contacts. Powder Metallurgy, v. 3, p. 138-144, 1979.
GAFFET, E.; LOUISON, C.; HARMELIN, M.; FAUDOT, F. Metastable phase transformations induced by ball-milling in the Cu-W system. Materials Science and Engineering A, n. 134, p. 1380-1384, 1991.
GALIOTTO A., Estudo da Sinterabilidade de Materiais Ferrosos Contendo Elevados Teores de Sulfetos como Aditivos. Dissertação. Uniiversidade Federal de Santa Catarina, 2005.
GENTE, C.; OEHRING, M.; BORMANN, R. Formation of thermodynamically unstable solid solutions in the Cu-Co system by mechanical alloying. Physical Review B, v. 48, n. 18, p. 13244-13252, 1993.
GERMAN, R.M., Injection molding of metals and ceramic. Princeton, New Jersey: MPIF,cap. 8, p. 218-230, 1997.
GERMAN, R.M., Consolidation principles and process molding. In: ASM Handbook. Powder metal technologies and applications. Materials Park, OH. v. 7, p. 437-452, 1998.
GERMAN, R. M.; HENS, K. F.; JOHNSON, J. L. Powder metallurgy processing of thermal management materials for microelectronec applications., p. 205-216, 1994.
GHADIRI, M. E. A. Particle Characterization Size and Morfology. London: The Institute of Metals Series on Powder Metallurgy, p. 56-75, 1991.
GOMES, U. U. Tecnologia dos Pós: Fundamentos e Aplicações. Natal, RN: Editora Universitaria, 1995.
GOMES U. U, C. F. A., SILVA A. G. P. On sintering of W-Cu composite alloys. Proceedings of the 15th Inter. Plansee Seminar, v. 4, p. 177-189, 2001.
GOTOH, K.; MASUDA, H.; HIGASHITANI, K., Powder Technology Handbook. Second Edition. Editora Marcel Dekker Inc. Nova York, 1997.
HUANG, J. Y.; WU, Y. K.; HE, A. Q.; YE, H. Q. Direct evidence of nanocrystal enhanced complete mutual solubility in mechanically alloyed Co-Cu powders. Nanostructured Mater., v. 4, p. 293-302, 1994.
HUME-HOTHERY, W.; RAYNOR, G.V., The structure of metals and alloys. London:Institute of metals. 1962.
JOHNSON, J.L.; GERMAN, R.M., Chenicall activated liquid phase sintering of tungstencopper. Int. Powder Metallurgy, v. 30, n. 1, p. 91-102, 1994.
JOHNSON, J.L.; GERMAN, R.M., Role of solid-state skeletal sintering during processing of Mo-Cu composites. Metallurgical and materials transactions A, v. 32A, p. 605-613, 2001.
JOHNSON, J. L.; GERMAN, R. M. Powder Metallurgy processing of Mo-Cu for Thermal Management Applications., p. 39-48, 1999. Role of Solid-State Skeletal Sintering during Processing of Mo-Cu Composites., p. 605-613, 2001.
KAYSSER, W. A. Solid State Sintering. London: The Institute of Metals Series on Powder Metallurgy, p. 45-53, 1991.
KEMPTON, H. R. Powder Systems and Applications. Ohio: ASTM, Metals Handbook., v. 7, p. 568-574, 1988.
KIM, J. C. A. M., I. H. Sintering of Nanostructured W-Cu Alloys Prepared by Mechanical Alloying. NanoStructured Materials, v. 10, p. 283-290, 1997.
KIM, T. H.; YU, J. H.; LEE, J. S. The mechanism of hydrogen reduction synthesis of nanocomposite W-Cu powders. NanoStructured Materials, v. 9, p. 213-216, 1997.
KIM, J.C.; MOON, I.H., Sintering of nanostructured W-Cu alloys prepared by mechanical alloying. Nanostructured materials, v. 10, n. 2, p.283-290, 1998.
KIM, S.W.; RYU, J.S.; MOON, I.H., Ball milling effect on the powder characteristics in metal injection molding of W-Cu powder. In: Advances in powder metallurgy & particulate materials, may 30-june 03, 2000, New York. Proceedings of the international conference on powder metallurgy & particulate materials. New York, p. 101-111, 2000.
KOTHARI, N. C. Factors affecting tungsten-copper and tungsten-silver electrical contact materials. Powder Metallurgy International, v. 14, p. 139-143, 1982.
KOCH, C. C. Mechanical milling and alloying. In.: CAHN, R. W., HAASEN, P. and KRAMER, E. J. Materals science and technology: a comprehensive treatment. Reutte, Austria. Metallwerk plansee Ges. m. b. H., 1991, v. 15, Cap. 5, p. 193-245.
LEE, W.E.; REINFORTH, W.M., Ceramic microstructure property control by processing. London: Chapman & Hall, p. 03-64, 1994.
LEE, J.S.; KIM, T.H., Densification and microstructure of the nanocomposite W-Cu powders. Nanostructered Materials, v. 6, p. 691-694, 1995.
LENEL, F. V. Powder Metallurgy Principles and Applications. Princeton, New Jersey: Metal Powder Ind. Federation, 1980. cap. 9, 10 e 11, p. 241-319.
LU, D.; TANG, A., Densification and diffusion bonding of W-Cu composites by HIP processing. In: Proceedings of the first International Conference on Tungsten and Tungsten Alloys, p. 53-60, Arlington, 1992.
MATERIALS, A. C. O. E. C. Electric contact materials. In: ASMMetals Handbook. (Ed.). Park, OH,, v. 3, p. 662-694, 1984.
MEYERS, M. A.; MISHRA, A.; BENSON, D. J., Mechanical properties of nanocrystalline materials, Progress in Materials Science, Univ. of California, USA, 2005.
OKUYAMA. K. SINTERING. IN: GOTOH, K.; H., M.; K., H. Powder Technology Handbook. New York: MARCEL DEKKER, INC,. p. 193-200, 1997.
SILVA, A. G. P. Study on Sintering and Grain Growth of WC-Based Hardmetals. Viena. 1996. Tese (Doutorado) Faculdade de Quimica - Universidade Tecnica de Viena. Viena.
SURYANARAYANA, C. Mechanical alloying. In: ASM Handbook. (Ed.) Powder metal technologies and applications. Materials Park, OH, 1998. v. 7, p. 80-179.
SURYANARAYANA, C. Nanocrystalline materials. Int. Materials Reviews, v. 40, n. 2, p. 41-64, 1995
.
SURYANARAYANA, C. Mechanical alloying and milling, Progress in Materials Science, n. 46, p. 1-184, 2001.
SURYANARAYANA, C.; IVANOV, E.; BOLDYREV, V.V., The Science and Technology of Mechanical Alloying; Materials Science and Engineering. A-304-306, p. 151-158, 2001.
SURYANARAYANA, C.; IVANOV, E.; BOLDYREV. The science and technology of mechanical alloying. Materials Science and Engineering. p. 151-158, 2001.
TANDON, R.; JOHNSON, J., Liquid-phase sintering. In: ASM handobook (Ed.). Powder metal technologies and applications. Materials Park, OH, v. 7, p. 565-573, 1998.
UPADHYAYA, A.; GERMAN, R.M., Tungsten, tungsten alloys and tungsten compounds. Ullmann’s Encyclopedia of Industrial Chemistry, v. A 27, p. 228-266, 1998.
UPHADHYAYA A, G. R. Densification and dilation of sintered W-Cu alloys. Powder Metall, v. 34, p. 43-45, 1998.
UPHADHYAYA, A.; JOHNSON, J. L.; GERMAN, R. M. Dimensional stability in liquid phase sintered W-Ni-Cu alloys., p. 15-16, 1995.
YANG, B.; GERMAN, R. M. Powder injection molding and infiltration sintering of superfine grain W-Cu. Int. J. Powder Metall, v. 33, p. 55-64, 1997.