Effect of Nanosized Al2O3 as Additive on the Sintering Characteristics and Vickers Hardness of Al2O3/Si3N4 Compound Ceramics

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In order to enhance the density and decrease the sintering temperature,Al2O3/Si3N4 compound ceramics were sintered by pressureless using β- Si3N4 as raw materials and Al2O3 as sintering additives. The effects of Al2O3 as additive on the Vickers hardness and the sintering characteristic of Al2O3/Si3N4 compound ceramics were studied. The results shows that adding 9-15% nano- Al2O3 can get Al2O3/Si3N4 compound ceramics only in 1650°C by pressureless sintering because of nano- Al2O3’sintered. As a consequence, the relative density increases from 89% with micro alumina to above 97% with nano- Al2O3, the Vickers hardness increases from 1043.5MPa to 1356.0 MPa.

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Periodical:

Edited by:

Zeng Zhu

Pages:

178-181

DOI:

10.4028/www.scientific.net/AMR.214.178

Citation:

H. F. Wang et al., "Effect of Nanosized Al2O3 as Additive on the Sintering Characteristics and Vickers Hardness of Al2O3/Si3N4 Compound Ceramics", Advanced Materials Research, Vol. 214, pp. 178-181, 2011

Online since:

February 2011

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$35.00

[1] F. Luo, D.M. Zhu, H. Zhang, W.C. Zhou: Materials Science and Engineering A, Vol431 (2006), P. 285.

[2] C. Santos, K. Strecker, M.J.R. Barboza, F. Piorino Neto O.M.M. Silva, C.R.M. Silva : International Journal of Refractory Metals & Hard Materials , Vol23 (2005),P. 183–192.

DOI: 10.1016/j.ijrmhm.2005.02.003

[3] Thanakorn Wasanapiarnpong, Shigetaka Wada, Masamitsu Imai, Toyohiko Yano: Journal of the European Ceramic Society, Vol 26 (2006), P. 3467.

DOI: 10.1016/j.jeurceramsoc.2005.10.011

[4] EN ISO 6507-1: (2005).

[5] M.T. Lin, D.Y. Jiang, L. Li, Z.L. Lu, T.R. Lai, J.L. Shi: Materials Science and Engineering A, Vol351 (2003), P. 9.

[6] Tadeusz von Rymon Lipinski. in: Proc. of Unified International Technical Conf. on Refractories (UNITECR'2009), Salvador, Brazil, (2009).

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