Properties of Alumina Green Parts via Selective Laser Sintering Combined with Cold Isostatic Pressing

Abstract:

To obtain complex shape alumina ceramic parts, a composite powder of epoxy resin binder E-06 and alumina powder were laser sintered combined with cold isostatic pressing (CIP). Experiments on selective laser sintering (SLS) and CIP were carried out to probe the influencing factors in the processes of forming alumina green parts. When laser power, scan speed, scan spacing and layer thickness were, respectively, 21 w, 1800 mm/s, 100 μm and 150 μm, the density and bending strength of alumina parts were relatively high. Following that, we experimented on different CIP maximum pressure which had different effects on densification of SLS alumina parts, the whole process in CIP was divided into two stages of I and II. Finally, the optimized SLS/CIP alumina parts were degreased and then sintered in 1600 °C for 2 h to produce crack-free alumina parts.

• Periodical: Applied Mechanics and Materials (Volumes 325-326)
• Pages: 83-87
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.325-326.83
• Online since: June 2013
• Authors: Kai Liu, Chen Hui Li, Wen Ting He, Yu Sheng Shi
• Keywords: Alumina Ceramic, Cold Isostatic Pressing, Selective Laser Sinter

References

[1] Hwa HT, Ming LC, Hsiao CY (2011) Slurry-based selective laser sintering of polymer-coated ceramic powders to fabricate high strength alumina parts. Journal of the European Ceramic Society 31(8):1383-1388

DOI: 10.1016/j.jeurceramsoc.2011.02.020

[2] Hagedon Y, Wilkes J, Meiners W, Wissenbach K, Poprawe P (2010) Net shaped high performance oxide ceramic by selective laser melting. Physics Proceedia 5(B):587-594

[3] Khuram S, Jan D, Stijn B, Bram N, Jean-Pierre K, Jef V (2012) Preparation and indirect selective laser sintering of alumina/PA microspheres. Ceramics International 38: 1241-1247

DOI: 10.1016/j.ceramint.2011.08.055

[4] Liu ZH, Notle JJ, Packard JI, Hilmas G, Dogan F, Leu MC (2007) Selective laser sintering of high-density alumina ceramic parts. In:Proceedings of the 35th International MATADOR Conference, Taipei, Taiwan: National Taiwan University. 14: 351–354

DOI: 10.1007/978-1-84628-988-0_79

[5] Liu J, Zhang B, Yan CZ, Shi YS (2010) The effect of processing parameters on characteristics of selective laser sintering dental glass-ceramic powder. Rapid Prototyping Journal 16(2):138-145

DOI: 10.1108/13552541011025861

[6] Hendersona RJ, U, Chandler HW, Akisanyaa AR, Moriarty B (2000) Bag design in isostatic pressing. Materials and design 21(4):259-262

DOI: 10.1016/s0261-3069(99)00076-x

[7] Barbieri RA, Perottoni CA, Zorzi JE (2012) Influence of sintering Temperature on the mechanical properties of alumina springs. International journal of applied ceramic technology 9(3):599-605

DOI: 10.1111/j.1744-7402.2011.02682.x