Accession Number:

ADA393567

Title:

A High Temperature Microhardness Tester for Structural Ceramics

Descriptive Note:

Final rept. 1 May 1999-14 May 2000

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA

Personal Author(s):

Report Date:

2001-07-01

Pagination or Media Count:

7.0

Abstract:

The grant was initiated on May 1, 1999. In view of the fact that high temperature microindentation testers are no longer in commercial production, we have instead designed, purchased and received an atomic force microscope AFM from Digital Instrument. This instrument is configured to perform nanoindentation tests to obtain information on deformation resistance in both elastic and plastic range. The instrument was installed in September 1999 and personnel have been trained to operate the instrument at the same time. We have proceeded with nanomechanical characterization of the bulk silicon nitride and SiAlONs and their interfacial properties. This includes a study of the intergranular glassy phase that is often thought to be a critical factor in determining their mechanical performance.

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE