Hardness and Toughness of Aluminum Porcelains Measured by the Indentation Test


Article Preview

Triaxial porcelains for utilization in electric applications use alumina in its composition replacing quartz in order to improve mechanical strength. This property is a critical parameter for the application of this product. As a consequence of that, in this work, it was evaluated the mechanical strength, analyzing porcelain hardness and toughness by the indentation test, a fast way for measurement of strength. It was studied the different models used in the measurement of these parameters found in literature. It was verified which procedures are better for this type of material, comparing to values of toughness obtained by the method of Fracture Mechanics using notched samples. It is also presented technical characterization and photomicrographs of the analyzed samples.



Materials Science Forum (Volumes 530-531)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho




S.R. Bragança and C.P. Bergmann, "Hardness and Toughness of Aluminum Porcelains Measured by the Indentation Test", Materials Science Forum, Vols. 530-531, pp. 562-567, 2006

Online since:

November 2006




[1] L. Mattyasovszky-Zsolnay, J. Mater. Sci. 40 (1957) 299-306.

[2] S.I. Warshaw, R.J. Seider, J. Am. Ceram. Soc. 50 (1967) 337-42.

[3] Y. Kobayashi, O. Ohira, E. Kato, J. Am. Ceram. Soc. 75 (1992) 1801-6.

[4] Carty, M.W. & Senapati, U., J. Am. Ceram. Soc. 81 (1998) 3-20.

[5] Y. Ohya, Y. Takahashi, J. Am. Ceram. Soc. 82 (1999) 445-8.

[6] O.I. Ece, Z. Nakagawa, Ceramics Int. 28 (2002) 131-40.

[7] F. H. Norton, Fine ceramics technology and applications. Mc Graw-Hill, p.505, (1987).

[8] J.B. Wachtman, Mechanical properties of ceramics. John Wiley & Sons, p.448, (1991).

[9] K.E. Amin, Ceramics and glass, Engineered materials handbook, ASM, (1991).

[10] B. Gross, J.E. Srawley, NASA TN D - 2603, (1965).

Fetching data from Crossref.
This may take some time to load.