Joining of Ceramic Components in the Green State via LPIM



It has been successfully demonstrated that ceramic materials can be joined in the green state without a second phase by using low pressure injection molded parts. The investigation of the joining interface revealed that a high quality interface can be achieved by carefully adjusting the different manufacturing steps. The use of monomodal particle size distribution in the used powder CT3000SG is inferior to a broader particle size distribution obtained by replacing 33% of the finer alumina powder by coarser CT1200SG. In this way the dewaxing process is significantly improved when the wall thickness of the part exceeds 3 mm. The investigation of the mechanical properties of the joined and sintered parts revealed, that the bending strength of the joined specimens achieved about 80 % of the unjoined, monolithic specimens.




Deliang Zhang, Kim Pickering, Brian Gabbitas, Peng Cao, Alan Langdon, Rob Torrens and Johan Verbeek




R. Waesche et al., "Joining of Ceramic Components in the Green State via LPIM", Advanced Materials Research, Vols. 29-30, pp. 207-210, 2007


November 2007




[1] US patent N 4, 416, 603.

[2] E. Zorzi, C.A. Perottoni and J.A.H. da Jornada, A new partially isostatic method for debinding of low-pressure injection molded ceramic parts, Materials Letters, 57, (2003) p.3784.


[3] R.E.F. Quevedo Nogueira, A Campos Bezerra, F.C. dos Santos, M.R. de Sousa and W. Acchar, Low-Pressure Injection Molding of Alumina Ceramics Using a Carnauba Wax Binder: Preliminary results, Key Engineering Materials , 189-191, (2001) p.67.


[4] R. Knitter, W. Bauer and C. Fechler, Ceramics in micr-reactiontechnology: materials and processing. Process miniaturization, Proceedings of 2 nd Int. Conference on Micro Reaction Technology, New Orleans, March 8-12, (1998) p.164.

[5] R. Knitter, W. Bauer, D. Göhring and J. Haußelt, Manufacturing of ceramic micro components by a rapid prototyping process chain, Adv. Eng. Materials 3[1-2], (2001) p.49.


[6] V. Piotter, T. Benzler, T. Gietzelt, R. Ruprecht and J. Haußelt, Micro powder injection molding, Adv. Eng. Mat. 2.


[10] (2000) p.49.

[7] A.M. Nagel and H. Exner, Laser welding of functional and constructional ceramics for microelectronics, " SPIE, S International Symposium on High Power Lasers and Applications, SanJose, USA, (1999) p.262.

[8] R.J. Crawford, Plastics Engineering, 2 nd edition, Pergamon Press, Oxford, (1987).