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Resistance of Titanium Diboride to High‐Temperature Plastic Yielding
Author(s) -
Ramberg Jeffrey R.,
Wolfe Cynthia F.,
Williams Wendell S.
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb09637.x
Subject(s) - materials science , lamellar structure , crystallite , ceramic , titanium diboride , composite material , grain size , titanium , metallurgy
Polycrystalline TiB 2 specimens of 3 μm average grain size but free of lamellar precipitates were compression‐tested to 1900°C and 500 MPa. No plastic yielding was detected. Under such conditions, most other structural ceramics do exhibit yield behavior. The results suggest the existence of a high Peierls stress, presumably related to Ti—B bonding. This finding contrasts with a report on ZrB 2 in which resistance to yielding was attributed to lamellar precipitates.