A FUNDAMENTAL STUDY OF GRAIN BOUNDARY PHENOMENA IN CERAMIC MATERIALS. Status Report No. 1 for the Period June 15, 1958 to March 1, 1959
Technical Report
·
OSTI ID:4230974
The role of the grain boundary in the creep process was examined by direct observation of grain boundary sliding in ceramic bi-crystals. Specimens of MgO, Al/sub 2/O/sub 3/, and NaCl were tested up to 1100 deg C. The alumina and magnesia bi-crystals exhibited no grain boundary sliding at these temperatures, while NaCl crystals manifested marked sliding. Internal friction studies revealed the presence of grain boundary stress relaxation peaks in the spectra of magnesia and alumina at about 1000 C. Etchpit studies were also conducted with particular emphasis on MgO. (J.R.D.)
- Research Organization:
- Materials Research Corp., Yonkers, N.Y.
- NSA Number:
- NSA-13-022382
- OSTI ID:
- 4230974
- Report Number(s):
- AECU-4364
- Country of Publication:
- United States
- Language:
- English
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