Skip to main content Accessibility help
×
Home

Intra- and Intergranular Fracture of Diamond Thin Films

  • H. A. Hoff (a1), A. A. Morrish (a1), W. A. Carrington (a2), J. E. Butler (a1) and B. B. Rath (a1)...

Abstract

Diamond thin films have been synthesized at low pressures by chemical vapor deposition (CVD) and, recently, at ambient atmosphere with an oxygen-acetylene welding torch. By the application of appropriate thermal or mechanical stresses to the substrate, the diamond films can be delaminated. The delaminated films which are only a few microns thick have been fractured by manual bending. Scanning electron microscopy (SEM) examination of fractured CVD diamond films shows the presence of primarily intragranular fracture attesting to the inherent strength of the films. Using transmission electron microscopy (TEM), twinning and stacking faults are seen within the crystallites of the films along the fracture surfaces. By combining SEM and TEM examination, the relative degree of intragranular fracture found in films synthesized by both CVD and oxygen-acetylene torch has been investigated. Possible mechanisms for the intragranular fracture and the relative strength of such films are discussed.

Copyright

References

Hide All
1. Angus, J.C. and Hayman, C.C., Science 241, 913 (1988).
2. Hanssen, L.M., Carrington, W.A., Butler, J.E., and Snail, K.A., Mater. Lett. 7, 289 (1988); W.A. Carrington, L.M. Hanssen, K.A. Snail, D. Oakes, and J.E.Butler, Met. Trans. 20A, 1282 (1989).
3. Gigl, P.D., in High Pressure Science and Technology, Vol.1, edited by Timmerhaus, K.D. and Barber, M.S. (Plenum Press, New York, 1979), p. 914.
4. Trueb, L.F. and Butterman, W.C., Am. Min. 54, 412 (1969); K.J. Dunn and M. Lee, J. Mater. Sci. 4, 882 (1979).
5. Walmsley, J.C. and Lang, A.R., J. Mater. Sci. Lett. 2, 785 (1983).
6. Williams, B.E. and Glass, J.T., J. Mater. Res. 4, 373 (1989); W.Zhu, A.R.Badzian and R.Messier, J. Mater. Res. 4, 659 (1989).
7. Butler, J.E., Celie, F.G., Oakes, D.B., Hanssen, L.M., Carrington, W.A., and Snail, K.A., High Temp. Sci., in press (1989).
8. Knight, D.S. and White, W.B., J. Mater. Res. 4, 385 (1989).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed