Abstract
The microhardness and fracture toughness of laser nanocrystalline ceramics based on the cubic oxides Y2O3 and Y3Al5O12 are determined experimentally. It is shown by comparative measurements that the fracture toughness and microhardness of Y2O3 ceramics exceed the corresponding parameters of Y2O3 single crystals by factors of 2.5 and 1.3, respectively. The fine morphology of grains and grain boundaries in fractures is investigated. It is ascertained that changes in the mechanical properties of the nanocrystalline ceramics under study are related to both the sizes and structure of grains and the structure of grain boundaries. It is suggested that twinning processes determine the mechanisms of formation of nanocrystalline ceramics.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. Lu, K. Ueda, H. Yagi, et al., J. Alloys Compd. 341(1), 220 (2002); A. A. Kaminskii, Phys. Status Solidi A 200 (2), 215 (2003).
H. Yagi and T. Yanagitani, JP Appl., No. 2003-89578 (2003); JP Appl., No. 2003-128465 (2003).
T. Yanagitani and H. Yagi, JP Appl., No. 10-101333 (1998); JP Appl., No. 10-101411 (1998).
A. A. Kaminskii, H. J. Eichler, K. Ueda, et al., Phys. Status Solidi A 181(2), R19 (2000).
J. Lu, T. Murai, K. Takaichi, et al., Laser Phys. 11(5), 1053 (2001).
A. Shirakawa, H. Yagi, J. F. Bisson, et al., Opt. Express 11, 2911 (2003).
A. Shirakawa, K. Takaichi, H. Yagi, et al., Laser Phys. Lett. 14(11), 1555 (2004).
J. Lu, J. Lu, A. Shrakawa, et al., Phys. Status Solidi A 189, R11 (2002); J. Lu, J. Lu, T. Murai, et al., Opt. Lett. 27 (13), 1120 (2002).
A. A. Kaminskii, S. N. Bagaev, K. Ueda, et al., Laser Phys. Lett. 2(1) (2005).
K. Takaichi, H. Yagi, J. Lu, et al., Phys. Status Solidi A 200(1), R5 (2003).
J. Lu, J. I. Lu, A. Shirakawa, et al., Laser Phys. 12(7), 940 (2003).
J. Lu, J. F. Bisson, K. Takaichi, et al., Appl. Phys. Lett. 83(6), 1101 (2003).
J. Lu, K. Takaichi, T. Uematsu, et al., Appl. Phys. Lett. 81(23), 4324 (2002).
K. Takaichi, H. Yagi, A. Shirakawa, et al., Phys. Status Solidi A (2005) (in press).
E. Carnall, C. E. Hatch, and W. F. Parsons, in Materials Science Research (Plenum, New York, 1986), p. 165.
C. Greskovich and J. P. Chernoch, J. Appl. Phys. 44(4), 4599 (1973).
A. Ikecui, T. Kinoshita, K. Kamata, and K. Yoshida, J. Ceram. Soc. 78(4), 1033 (1995).
A. A. Kaminskii, M. Sh. Akchurin, V. I. Alshits, et al., Kristallografiya 48(3), 562 (2003) [Crystallogr. Rep. 48, 515 (2003)].
B. R. Lawn, A. G. Evans, and D. B. Marshall, J. Am. Ceram. Soc. 63(2), 576 (1980).
A. P. Rebinder, Izv. Akad. Nauk SSSR, Ser. Khim. 5, 639 (1936).
M. Sh. Akchurin and V. R. Regel, Chem. Rev. 23, 59 (1998).
F. I. Gusev, Usp. Fiz. Nauk 108(1), 55 (1998) [Phys. Usp. 41 (1), 49 (1998)].
A. A. Urusovskaya, M. Gartmanova, G. G. Knab, et al., in Actual Problems of Microindentation Physics (Shtiintsa, Chisinau, 1989).
E. A. Stepantsov, M. Sh. Akchurin, and V. G. Govorkov, Kristallografiya 23(4), 872 (1978) [Sov. Phys. Crystallogr. 23, 492 (1978)].
R. A. Andrievskii and A. M. Gleizer, Fiz. Met. Metalloved. 88(1), 50 (1999); 89 (1), 91 (2000).
M. Sh. Akchurin and R. V. Galiulin, Kristallografiya 48(3), 514 (2003) [Crystallogr. Rep. 48, 469 (2003)].
M. Sh. Akchurin, R. V. Galiulin, and P. P. Fedorov, Vestn. Tambov. Gos. Univ. 8(4), 549 (2003).
Author information
Authors and Affiliations
Additional information
__________
Translated from Kristallografiya, Vol. 50, No. 5, 2005, pp. 935–939.
Original Russian Text Copyright © 2005 by Kaminski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\), Akchurin, Ga\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\)nutdinov, Takaichi, Shirakava, Yagi, Yanagitani, Ueda.
Rights and permissions
About this article
Cite this article
Kaminskii, A.A., Akchurin, M.S., Gainutdinov, R.V. et al. Microhardness and fracture toughness of Y2O3-and Y3Al5O12-based nanocrystalline laser ceramics. Crystallogr. Rep. 50, 869–873 (2005). https://doi.org/10.1134/1.2049410
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.2049410