8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-599-C7-602
Photoacoustic microscopy of indentation lateral cracksD.N. Rose1, D.C. Bryk1, G. Arutunian1, J.E. Dumar1 and M.J. Slavin2
1 AMSTA-JA, US Army Tank-Automotive Command, Warren, MI 48397-5000, U.S.A.
2 AMSRL-MA-CA, US Army Research Laboratory, Watertown, MA 02172-0001, U.S.A.
Understanding the fracture process in advanced ceramics is of obvious use for improving their strength, toughness and ultimately performance. The lateral cracking process is related to wear in particular. Photoacoustic microscopy is used here to view lateral cracks produced in a controlled manner by Vicker's indentations in hot pressed silicon nitride (NC 132, Norton Co.). Eventually, a figure of merit related to bearing performance may emerge.
© EDP Sciences 1994