Kinetic microhardness measurements of sialon-based ceramics
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The conventional procedure of microhardness testing consists in applying a fixed load on an indentor and measuring the square of the indent under the microscope. The method of kinetic microhardness (registration of the depth of penetration of an indentor as a function of load) reveals new features of mechanical characteristics of the surface of brittle materials. The investigated sialon-based ceramics demonstrate unrelaxed hardness from 5–13 GPa and elastic relaxation up to 60%–63%. Analysis of the surface layers was made in ranks of the Meyer's equation. The value of the coefficient, N (Meyer's index), of the best investigated materials was found to be 2, varying from 0.92–2.10.
KeywordsPolymer Surface Layer Brittle Material Processing Mechanical Characteristic
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- 1.S. I. Bulyichev and V. P. Alekhin, “Testing of materials by continuous intrusion of indentor” (Moscow, Mashinostrogenic, 1991), 224 p. (in Russian).Google Scholar
- 7.H. Buckle, in “Science of Hardness Testing and its Research Applications” (ASM, Metals Park, OH, 1971) pp. 453–94.Google Scholar
- 8.P. M. Sargent and T. F. Page, Proc. Brit. Ceram. Soc. 26 (1978) 209.Google Scholar
- 9.A. P. Ternovsky, V. P. Alekhin, V. N. Skvortsov, Y. V. Malov and A. S. Artemov, in “New in the Sphere of Microhardness Testing” (Moscow, Nauka, 1974) (in Russian) pp. 71–83.Google Scholar
- 10.A. P. Ternovsky, V. P. Alekhin and S. I. Bulyichcev, Metallophysica 44 (1973) 354 (in Russian).Google Scholar
- 11.I. V. Gridneva, Y. V. Mitman and V. N. Trefilov, “Defects of Structure of Semiconductors”, Proceedings of the Conference, Novosibirsk, Nauka, 1970, p. 79 (in Russian).Google Scholar
- 14.S. Palmqvist, Jernkontors Ann. 5 (1957) 300.Google Scholar