The Role of Polymer Binder in Ceramic Injection Moulding

Abstract:

In this study thermal degradation of feedstock based on Al₂O₃ high compressible superground powder was investigated. The alumina powder was mixed with polymeric binders to compose the feedstock. Binder systems for CIM (Ceramic Injection Moulding) technology differed in concentration and composition of polyethylene, polyethylene glycol, low density polyethylene and waxes. The debinding and pre-sintering behavior of formulated feedstocks was characterized by thermogravimetric analysis. The results demonstrated the relationship between the feedstock thermal degradation properties and the binder system composition.

References

[1] R.M. German and A. Bose, Injection Molding of Metals and Ceramics, Metal Powder Industries Federation, Princeton (1997).

[2] V. M. Kryachek, Injection Moulding, Powder Metallurgy and Metal Ceramics, Vol. 43, Nos. 7-8, (2004).

DOI: 10.1023/b:pmmc.0000048127.24809.d3

[3] P. Schwenzel and J.F. Petzold, EuroPM2009 Proc., 2, 129 (2009).

[4] Zhang JG, Edirisihinghe MJ, Evans JRG: A Catalogue of Ceramic Injection Moulding Defects and Their Causes, Ind. Ceram. 9 (1989) 72-82.

[5] C.R. Wildemuth and M.C. Williams, Rheol. Acta., 23, 627 (1984).

[6] R. CI Chung, BO Rhee, Requirements of binder for powder injection molding, Compend Met Inject Molding, 2 (1987), p.269–277.

[7] B.K. Lograsso, A. Bose, B.J. Carpenter, C.I. Chung, K.F. Hens, D. Lee, S.T. Lin, C.X. Liu, R.M. German, R.M. Messler, P.F. Murley, B.O. Rhee, C.M. Sierra, J. Warren Injection molding of carbonyl iron with polyethylene wax, Int. J. Powder Metall., 25 (4) (1989).

[8] H.E. Amaya, Solvent dewaxing: principles and application, in: Proceedings of the Powder Metallurgy Conference on Advances in Powder Metallurgy, Vol. 3, 1990, p.233–246.

[9] Y Li, X Qu, B Huang, G Qiu, Rheological properties of metal injection molding binder and feedstock, Trans. Nonferrous Met. Soc. China, 7 (1997), p.103–107.

[10] R.M. German, Powder Injection Moulding, Metal Powder Industries Federation, Princeton, NJ, (1990).

[11] R.M. German, Homogeneity effects on feedstock viscosity in powder injection molding, J Am Ceram Soc, 77 (1) (1994), p.283–285.

DOI: 10.1111/j.1151-2916.1994.tb06992.x

[12] B. Hausnerová, T. Kitano, I. Kuřitka, J. Prindis, L. Marcaníková, The Role of Powder Particle Size Distribution in the Processability of Powder Injection Molding Compounds.

DOI: 10.1080/1023666x.2011.547047

[13] C. Karatasa, A. Kocerb, H.I. Ünalc, S. Saritasd, Rheological properties of feedstocks prepared with steatite powder and polyethylene-based thermoplastic binders.

DOI: 10.1016/s0924-0136(04)00269-9

[14] J.A. Mangels, R.M. Williams, Injection molding ceramics to high green densities, Am. Ceram. Soc. Bull., 62 (5) (1983), p.601–606.

[15] M.J. Edirisinghe, J.R.G. Evans, Properties of ceramic injection molding formulations, J. Mater. Sci., 22 (1987), p.269–277.

[16] P. Thomas-Vielmaa, A. Cerverab, B. Levenfelda, A. Váreza, Production of alumina parts by powder injection molding with a binder system based on high density polyethylene, Universidad Carlos III de Madrid, Departamento de Ciencia e Ingeniería de Materiales, Avda. de la Universidad, 30, 28911 Leganes, Spain.

DOI: 10.3934/nhm.2006.1.337

[17] R. Supati, N.H. Loh, K.A. Khor, S.B. Tor, Mixing and characterization of feedstock for powder injection molding, Mater. Lett., 46 (2000), p.109–114.

DOI: 10.1016/s0167-577x(00)00151-8