Indentation tests with loads between 0.5 and 10 mN were performed on fused quartz, (0001) oriented sapphire and (001) oriented barium titanate. The resulting submicron cracks were used to determine the fracture toughness of the tested samples. The indentation crack length method was applicable, but a c/a dependency of the constant of proportionality was found. In addition, a very effective and simple approach—using the extra penetration of the indenter, due to the formation of cracks, so called pop-in—was used to determine
REFERENCES
1.
2.
3.
G. R.
Anstis
, P.
Chantikul
, B. R.
Lawn
, and D. B.
Marshall
, J. Am. Ceram. Soc.
64
, 533
(1981
).4.
D. S.
Harding
, W. C.
Oliver
, and G. M.
Pharr
, Mater. Res. Soc. Symp. Proc.
356
, 663
(1995
).5.
J. S.
Field
, M. V.
Swain
, and R. D.
Dukino
, J. Mater. Res.
18
, 1412
(2003
).6.
C.
Tromas
, J.
Colin
, C.
Coupeau
, J. C.
Girard
, J.
Woirgard
, and J.
Grilhé
, Eur. Phys. J.: Appl. Phys.
8
, 123
(1999
).7.
8.
J. E. Bradby, J. S. Williams, and M. V. Swain, J. Mater. Res. (in press).
9.
10.
M.
Iwasa
, T.
Ueno
, and R. C.
Bradt
, J. Soc. Mater. Sci. Jpn.
30
, 1001
(1981
).11.
F.
Meschke
, O.
Raddatz
, A.
Kolleck
, and G. A.
Schneider
, J. Am. Ceram. Soc.
83
, 353
(2000
).
This content is only available via PDF.
© 2004 American Institute of Physics.
2004
American Institute of Physics
You do not currently have access to this content.