The production of sialon and sialon–boron nitride composites using oxidized (up to ~15 wt.% O) Si3N4–18 wt.% AlN composite powders resulting from plasma chemical synthesis is studied. Hot pressing of these powders to nonporous state at 1620–1775°C is accompanied by the formation of composites consisting mainly of a mixture of β-sialon (z = 1.5–2) and o′-sialon. Boron nitride additions in an amount of up to 15 wt.% lead to the formation of composites that contain BN lamellar grains in the matrix of single-phase β-sialon (z = 1.5–2). The mechanical and tribological characteristics of the composites with micron and submicron grains are examined. It is observed that the dependence of scratch hardness on contact strength is almost linear for the sialon ceramics and sialon–boron nitride composites. The material is removed during machining through intensive brittle fracture. The introduction of boron nitride into sialon ceramics in an amount of more than 5% is accompanied by approximately a tenfold increase in the material removal in machining, making possible turning operations.
Similar content being viewed by others
References
I. Zalite, N. Zilinska, and G. Klauder, “Some sialons prepared from nаnopowders by hot pressing,” J. Phys. Conf. Ser., 93, 012008 (2007).
R. L. K. Matsumoto, “Evaluation of fracture toughness determination methods as applied to ceria-stabilized tetragonal zirconia polycrystal,” J. Am. Ceram. Soc., 70, No. 12, 366–368 (1987).
L. Vlengels, D. T. Jiang, and O. Van Der Biest, “Development and characterization of SiAlON composites with TiB2, TiC, and TiCN,” J. Mater. Sci., 39, 3375–3381 (2004).
O. N. Grigoriev, B. A. Galanov, V. A. Kotenko, and S. M. Ivanov, “Contact strength and fracture toughness of brittle materials,” Metallofiz. Noveish. Tekhnol., No. 8, 1001–1018 (2005).
O. M. Grigoriev, B. A. Galanov, V. A. Kotenko, and S. M. Ivanov, “Contact strength and mechanical properties of ceramic composites,” in: Fundamental Areas of Science: Chemistry and Scientific Basis for Advanced Processes [in Russian], Akademperiodika, Kiev (2005), pp. 304–326.
J. A. Williams, “Analytical models of scratch hardness,” Tribol. Int., 29, No. 8, 675–694 (1996).
V. M. Lunev and O. V. Nemashkalo, “Adhesion characteristics of coatings and methods of their measurement,” Fiz. Khim. Poverkhn., 8, No. 1, 64–72 (2010).
V. I. Trefilov, O. N. Grigoriev, and A. M. Shatokhin, “On the effect of structural state of brittle materials on the dependence of hardness on loading,” Dokl. Akad. Nauk SSSR, 259, No. 4, 836–839 (1981).
O. N. Grigoriev, “Investigation of the plasticity and strength properties of superhard materials by microindentation methods,” Powder Metall. Met. Ceram., 21, No. 1, 65–73 (1982).
O. N. Grigoriev, B. A. Galanov, V. A. Kotenko, et al., “Resistance of B4C–VB2 composites in abrasive wear and friction against steel,” Ogneupory Tekh. Keram., No. 10, 2–8 (2005).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Poroshkovaya Metallurgiya, Vol. 53, Nos. 9–10 (499), pp. 102–113, 2014.
Rights and permissions
About this article
Cite this article
Neshpor, I.P., Mosina, T.V., Grigoriev, O.N. et al. The Mechanical Properties of Sialon–Boron Nitride Composite Ceramics. Powder Metall Met Ceram 53, 574–582 (2015). https://doi.org/10.1007/s11106-015-9652-4
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11106-015-9652-4