Abstract
Direct additive manufacturing of ceramics (DAMC) without binders is a promising technique for rapidly fabricating high-purity components with good performance. Nevertheless, cracks are easily generated during fabrication as a result of the high intrinsic brittleness of ceramics and the great temperature gradients. Therefore, optimizing the DAMC process is a challenge. In this study, direct fabrication of Al2O3 single-bead wall structures are conducted with a laser engineered net shaping (LENS) system. A new process optimization method for suppressing cracks is proposed based on analytical models, and then the influence of process parameters on crack number is discussed experimentally. The results indicate that the crack number decreases obviously with the increase of scanning speed. Single-bead wall specimens without cracks are successfully fabricated by the optimized process.
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References
H.C. Yen, J. Eur. Ceram. Soc. 32, 3123 (2012).
A. Licciulli, C. Esposito Corcione, A. Greco, V. Amicarelli, and A. Maffezzoli, J. Eur. Ceram. Soc. 25, 1581 (2005).
J. Park, M.J. Tari, and H.T. Hahn, Rapid Prototyp. J. 6, 36 (2000).
V.K. Balla, S. Bose, and A. Bandyopadhyay, Int. J. Appl. Ceram. Technol. 5, 234 (2008).
W. Jan, H. Yves-Christian, and M. Wilhelm, Rapid Prototyp. J. 19, 51 (2013).
I. Shishkovsky, I. Yadroitsev, P. Bertrand, and I. Smurov, Appl. Surf. Sci. 254, 966 (2007).
I.A. Roberts, C.J. Wang, R. Esterlein, M. Stanford, and D.J. Mynors, Int. J. Mach. Tool Manuf. 49, 916 (2009).
K. Dai and L. Shaw, Acta Mater. 52, 69 (2004).
J. Song, Q. Deng, and Z. Ge, J. Shanghai Jiaotong Univ. Chin. Ed. 40, 0548 (2006).
J.H. Lee, A. Yoshikawa, H. Kaiden, K. Lebbou, T. Fukuda, D.H. Yoon, and Y. Waku, J. Cryst. Growth 231, 179 (2001).
K. Zhang, W. Liu, and X. Shang, Opt. Laser Technol. 39, 549 (2007).
U. De Oliveira, V. Ocelik, and J.T.M. De Hosson, Surf. Coat. Technol. 197, 127 (2005).
F.Y. Niu, D.J. Wu, S.Y. Zhou, and G.Y. Ma, J. Eur. Ceram. Soc. 34, 3811 (2014).
F.Y. Niu, G.Y. Ma, D.S. Chai, S.Y. Zhou, and D.J. Wu, Lasers in Manufacturing Conference, Munich, Germany, June 22–25, 2015.
T.L. Anderson, Fracture Mechanics: Fundamentals and Applications (Boca Raton, FL: CRC Press, 2005).
A.S. Jayatilaka, Fracture of Engineering Brittle Materials (London: Applied Science Publishers, 1979).
M. Gäumann, S. Henry, F. Cleton, J.D. Wagniere, and W. Kurz, Mater. Sci. Eng. A Struct. 271, 232 (1999).
W. Kurz and D.J. Fisher, Fundamentals of Solidification (Zurich: Trans Tech Publications, 1986).
Acknowledgements
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 51402037), the Science Fund for Creative Research Groups of China (No. 51321004), the National Key Basic Research Program of China (973 Program 2015CB057305), and the Fundamental Research Funds for the Central Universities (DUT152D229).
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Niu, F.Y., Wu, D.J., Yan, S. et al. Process Optimization for Suppressing Cracks in Laser Engineered Net Shaping of Al2O3 Ceramics. JOM 69, 557–562 (2017). https://doi.org/10.1007/s11837-016-2191-8
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DOI: https://doi.org/10.1007/s11837-016-2191-8