Preparation and characterization of alumina-iron cermets by hot-pressing of nanocomposite powders

作者: J. L GUICHARD , O TILLEMENT , A MOCELLIN

DOI: 10.1023/A:1018665116215

关键词: MetallurgyNanocompositePowder metallurgyMicrostructureComposite materialNanometreHot pressingCermetMaterials scienceSinteringFracture toughness

摘要: Alumina composites with 0–36 vol% iron metal dispersed inclusions have been prepared by a new processing route. Nanostructured powders were synthesized high energy dry ball-milling process and then consolidated sintering at 1700 K under pressure of 30 MPa. The materials consist micrometre-size Al2O3 metallic Fe in isolated regions from 10 μm down to nanometre size. From low contents, the same type interwoven microstructure is observed. Hardness, elastic shear moduli, fracture toughness size vary regularly content. Addition increased 3.0 8 MPa m1/2.

参考文章(22)
P. A. Trusty, J. A. Yeomans, Crack‐Particle Interactions in Alumina‐Iron Composites Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10. pp. 908- 913 ,(2008) , 10.1002/9780470314234.CH27
W.B. Chou, W.H. Tuan, Toughening and strengthening of alumina with silver inclusions Journal of the European Ceramic Society. ,vol. 15, pp. 291- 295 ,(1995) , 10.1016/0955-2219(95)90351-I
D. Osso, O. Tillement, A. Mocellin, G. Le Caer, O. Babushkin, T. Lindbäck, Mechanical-thermal synthesis of Al2O3-Cr composite powders Journal of The European Ceramic Society. ,vol. 15, pp. 1207- 1212 ,(1995) , 10.1016/0955-2219(95)00096-8
M. Nawa, T. Sekino, K. Niihara, Fabrication and mechanical behaviour of Al2O3/Mo nanocomposites Journal of Materials Science. ,vol. 29, pp. 3185- 3192 ,(1994) , 10.1007/BF00356661
Sung-Ik Lee, Yi Song, Tae Won Noh, Xiao-Dong Chen, James R. Gaines, Experimental observation of nonuniversal behavior of the conductivity exponent for three-dimensional continuum percolation systems. Physical Review B. ,vol. 34, pp. 6719- 6724 ,(1986) , 10.1103/PHYSREVB.34.6719
X. Zhang, G. Lu, M.J. Hoffmann, R. Metselaar, Properties and interface structures of Ni and Ni-Ti alloy toughened Al2O3 ceramic composites Journal of the European Ceramic Society. ,vol. 15, pp. 225- 232 ,(1995) , 10.1016/0955-2219(95)93943-W
M.F. Ashby, F.J. Blunt, M. Bannister, Flow characteristics of highly constrained metal wires Acta Metallurgica. ,vol. 37, pp. 1847- 1857 ,(1989) , 10.1016/0001-6160(89)90069-2