Abstract
The effect of carbon-containing additions and prior heat treatment in hydrogen and nitrogen for commercialgrade AlN powder on the chemical composition, structure, and also some physicomechanical properties of hot-pressed ceramics based on it are studied. It is shown that hot pressing occurs mainly in the solid phase. The fracture mechanism for hot-pressed ceramics varies from intercrystalline (using unprocessed AlN powder) to predominantly transcrystalline, the grain size of the basic phase decreases, and thermal conductivity and strength parameters increase.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K. Komeya and A. Tsuge, “Formation of AlN polytype ceramics and some of their properties,”J. Ceram. Soc. Jpn.,89, No. 1035, 615–620 (1981).
K. Komeya and H. Inoue, “The influence of fibrous aluminum nitride on the strength of sintered AlN - Y2O3,”Trans. J. Brit. Ceram. Soc.,70, No. 3, 107–113 (1971).
G. Van Tendeloo, K. T. Faber, and G. Thomas, “Characterization of AlN ceramics containing long period polytypes,”J. Mater. Sci.,12, No. 2, 525–532 (1983).
M. A. Kuzenkova, A. V. Kurdyumov, G. N. Makarenko, and G. S. Oleinik, “Structural changes during sintering of ultrafine aluminum nitride powder,”Poroshk. Metall., No. 10, 35–40 (1981).
K. Sh. Kerimov and V. I. Veprintsev, “High heat-conducting ceramics based on aluminum nitride,” in:Refractory Nitrides and Materials Based on Them [in Russian], Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev (1991).
K. Sh. Kerimov, V. I. Veprintsev, V. N. Anikin, et al., “Preparation of high heat-conducting ceramics based on aluminum nitride,”Tsvet. Metally, No. 3, 49–51 (1991).
“Ceramic article with high thermal conductivity coefficient,”USA Patent N4897372, Publ. (1990).
Yu. G. Tkachenko, R. A. Morozova, D. Z. Yurchenko, et al., “Effect of chemical heat treatment for aluminum nitride powder on the structure and properties of hot-pressed ceramics based on them,”Poroshk. Metall., Nos. 1–2, 76–81 (1995).
A. I. Evans and E. A. Charles, “Fracture toughness determination by indentation,”J. Amer. Ceram. Soc.,59, Nos. 7–8, 371–372 (1977).
Yu. I. Azimov, Yu. I. Belyaev, M. I. Kulakov, et al., “Device for measuring the thermal conductivity coefficient of high heat-conducting materials,”Prib. Tekh. Éksp., No. 4, 248–249 (1985).
Author information
Authors and Affiliations
Additional information
Translated from Poroshkovaya Metallurgiya, Nos. 5–6(413), pp. 100–107, May–June, 2000.
Rights and permissions
About this article
Cite this article
Koval’chenko, M.S., Tkachenko, Y.G., Yurchenko, D.Z. et al. Effect of prior heat treatment for commercial-grade aluminum nitride powder in gas atmospheres and activating additions on the structure and properties of hot-pressed ceramics based on it. Powder Metall Met Ceram 39, 303–309 (2000). https://doi.org/10.1007/BF02684683
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02684683