Al-W-B powder materials; pp. 142–149
PDF |
doi: 10.3176/eng.2010.2.03Authors
Irina Boiko, Victor Mironov, Oleg Filippov
Abstract
Al-W-B composite materials, obtained by hot pressing of separate layers of the fibres, previously covered with aluminium by thermal spraying, containing from 25% to 60% of B-W fibres, have been studied. The structure and some characteristics, in particular microhardness, of the materials and the possibility of crushing the Al-W-B material wastes into a powder were investigated. It has been shown that the bulk density of the final powder depends on the degree of crushing and microhardness of the solid phase, and the bulk density of the aluminium matrix of Al-W-B composite powders varies significantly. The compressibility of powders was investigated by the method of cold pressing and electrosintering and the properties of the obtained briquettes were studied. The samples after cold pressing and sintering had the density range from 2.1 to 2.3 g/сm3 and the compression strength from 70 to 90 MPa. Possible fields of application of powdered
Al-W-B alloy materials, such as manufacturing of grinding tools, are considered.
References
1. Kelley, A. and Davies, G. I. The principles of fiber reinforcement of metals. Metallurg. Rev., 1965, 10, 1–77.
2. Ter Haar, I. H. Powder Metallurgical Processing of Fiber Reinforced Aluminium Composites. TU Delft, Netherlands, 1993.
3. Muktepavela, F., Manika, I. and Mironovs, V. Structure and mechanical properties of Al-B composite powder. Mater. Design, 1997, 18, 257–259.
4. Mironov, V. and Muktepavela, F. Properties of Al-B powder obtained by crushing Al-B composite presenting industrial waste. In Proc. 2nd International Conference “Materials and Coatings for Extreme Performances”. Katsiveli, Ukraine, 2002, 606–607.
5. Upit, G. P. and Varchenya, S. A. Scientific Instruments (Matis, I. G., ed.). Zinatne, Riga, 1986, 12.
6. Manufactures of Laboratory Instruments. Fritsch Co., Germany. http://www.fritschco.biz/
7. Loikowski, W. and Fecht, H.-J. The structure of intercrystalline interfaces. Progr. Mater. Sci., 2000, 45, 339–568.
doi:10.1016/S0079-6425(99)00008-0
