Simulation of the neck growth of non-isometric biosphere during initial sintering

doi:10.1016/S1006-7191(08)60098-8

Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (4): 263-274.DOI: 10.1016/S1006-7191(08)60098-8

• Research paper • Previous Articles Next Articles

Simulation of the neck growth of non-isometric biosphere during initial sintering

Jixiang DU,Shuhua LIANG,Xianhui WANG, Zhikang FAN

Department of Material Science & Engineering, Xi'an University of Technology, Xi'an 710048, China

Received:2008-09-16 Revised:2009-02-11 Online:2009-08-25 Published:2009-10-10
Contact: Shuhua LIANG

Abstract

Abstract:

Because powders are mostly non-isometric during the sintering process, copper powders were chosen to study the effects of four material transport mechanisms, including surface diffusion, grain-boundary diffusion, volume diffusion, and multi-couplings. These material transport mechanisms were studied with respect to sintering neck growth of a non-isometric biosphere during initial sintering. The evolution of the neck growth in the four transport mechanisms was simulated by Visual C⁺⁺as well based on the model of different particles. The results show that the increase of the sintering temperature, both the grain-boundary diffusion and volume diffusion play primary roles in neck growth, while surface diffusion gradually becomes the secondary mechanism. Both the sintered neck and the shrinkage of the two centers increase with increasing temperature by means of the coupling diffusion mechanism. The radius of the sintering neck decreased, and the shrinkage rate of the two centers increased with an increase of the diameter ratio of the two spheres.

Key words: Sintering simulation, Non-isometric biosphere model, Diffusion mechanism, Sintering neck

Jixiang DU,Shuhua LIANG,Xianhui WANG,Zhikang FAN. Simulation of the neck growth of non-isometric biosphere during initial sintering[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(4): 263-274.

References

[1] A.P.M. Luis, M.C. Jose and R.Concepcion, J Am Ceram Soc 85 (2002) 76.
[2] H.H. Su and D.L. Johnson, J Am Ceram Soc 79 (1996) 3211.
[3] H.H. Su and D.L. Johnson, J Am Ceram Soc 79 (1996) 3199.
[4] N.H. Gregory, I.W. Chen and J.S. David, J Am CeramSoc 73 (1990) 2857.
[5] S.M. Xu, H.D. Ding and Y. Li, The Chinese J Nonferrous Metal 11 (2001) 176.
[6] S.M. Xu, H.D. Ding and Y. Li, J Arm Force Eng Institute 15 (2001) 22.
[7] X.N. Jing, Y. Ni and L.L. He, J Inorganic Mater 17 (2002) 1078.
[8] X.N. Jing, Y. Ni and L.L. He, Mater Sci Eng 21 (2003) 170.
[9] J. Anand and R.D. Raul, J Am Ceram Soc 73 (1990) 173.
[10] J.M. Li, S. Wang and S.H. Yuan, J Beijing Univ AerAstron 30 (2004) 787 (In Chinese).
[11] X.M. Liu, X.Y. Song and J.X. Zhang, Acta Matall Sin 42 (2006) 757 (in Chinese).
[12] X.N. Jing, J.H. Zhao and L.H. He, Mater Chem Phys 80 (2003) 595.
[13] Y.F. Cheng, S.J. Guo and H.Y. Lai, Powder Metall 17 (1999) 257.
[14] F. Parhami and R.M. McMeeking, Mech Mater 27 (1998) 111.
[15] T. Ikegami, Ceram Int 25 (1999) 415.
[16] J. Pan, H. Le, S. Kucherenko and J.A.Yeomans, Acta Mater 46 (1998) 4671.
[17] H.N. Cheng and J.Z. Pan, Acta Mater 55 (2007) 813.
[18] W. Zhang and J.H. Schneibel, Acta Metall Mater 43 (1995) 4377.
[19] W. Zhang and I. Gladwell, Comput Mater Sci 12 (1998) 84.
[20] J. Pan and A.C.F. Cocks, Acta Metall Mater 43 (1995) 1395.
[21] Y.F. Cheng, The DEM Simulation of Densification Process of Powders (University of Science and Technology Beijing, Beijing, 2000) p.94 (in Chinese).
[22] P.Y. Huang, Principle of Powder Metallurgy (Metallurgical Industry Press, Beijing, 1997) p.279 (in Chinese).
[23] Z.Q. Zheng, Foundation of Material Science (Central South University Press, Changsha, 2005) p.307 (in Chinese).
[24] Z.X. Fu, Investigation of Diffuse Bonding of Dynamics Course and Molding (Northwestern Polytechnical University,Xi'an, 1999) p.28 (in Chinese).
[25] D.L. Zhang, G.A. Weng, S.P. Gong and D.X. Zhou, Funtion Mater 32 (2001) 635 (in Chinese).
[26] G.C. Yu, Foundation of Refractory Materials (Shanghai Science and Technology Press, Shanghai, 1982) p.176 (in Chinese).

Simulation of the neck growth of non-isometric biosphere during initial sintering

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments

[1]	Y.Y. Zhu, S.H. Liang, Z.J. Zhan. Simulation of the Change of Sintering Neck between Two Grains in Two Dimensions [J]. Acta Metallurgica Sinica (English Letters), 2006, 19(6): 397-404 .
[2]	GAO Qiaojun Peking University,Beijing,ChinaT.T.TSONG The Pennsylvania State University,U.S.A Dept.of Physics,Peking University,Beijing,China. OBSERVATION OF EPITAXIAL OVERLAYER OF METALS AT ATOMIC LEVEL [J]. Acta Metallurgica Sinica (English Letters), 1989, 2(4): 231-236.