Combustion synthesis of α-Si3N4-(MgO, Y2O3) composites
- 48 Downloads
The possibility of obtaining composite powders of α-Si3N4-Y2O3 and α-Si3N4-MgO by self-propagating high-temperature synthesis (SHS) is studied. It is established that the α → β phase transformation starts at temperatures lower than the melting points of the corresponding eutectics. Metastable composite powders based on α-Si3N4 with a high rate of phase transition are obtained. The composite powders (α-Si3N4-Y2O3, α-Si3N4-MgO) are used in hot pressing technology.
Keywordssilicon nitride composite synthesis combustion ceramics
Unable to display preview. Download preview PDF.
- 3.Rongcan Zhou, Zhongchao Feng, Yong Liang, et al., “Reactions between SiC and sintering aids in Si3N4-SiC nanocomposites and their consequences,” Ceram. Int., No. 27, 571–576 (2001).Google Scholar
- 5.I. I. Tkacheva, “Hot-pressed ceramics of ultradisperse composite powders,” Ogneupory, No. 2, pp. 13–20 (1994).Google Scholar
- 6.V. V. Zakorzhevskii and I. P. Borovinskaya, “Some regularities of α-Si3N4 synthesis in a commercial SHS reactor,” Int. J. SHS, 9, No. 2, 171–191 (2000).Google Scholar
- 7.V. V. Zakorzhevskii, S. Yu. Sharivker, I. P. Borovinskaya, et al., “Specific features of self-propagating high-temperature synthesis of the AlN-Y2O3 system and some properties of the final products,” Int. J. SHS, 8, No. 2, 165–176 (1999).Google Scholar
- 8.R. Pampuch, J. Lis, L. Stoberski, and E. Ermer, “Improvement sinterability and microstructure of covalent ceramics by solid combustion synthesis,” Int. J. SHS, 2, No. 3, 49–55 (1993).Google Scholar