Experimental data are given for stress-rupture strength (time and deformation to failure) determination for densely-sintered oxide ceramic with four-point bending in the range 1400 – 1550°C (somewhat above the brittle-ductile transition temperature) and with loads up to 60 MPa (close to the ultimate strength). It is shown that elementary mechanical deformation over the whole range of specimen ductile behavior is diffusion-viscous flow with different forms, i.e., dislocation and crystal boundary diffusion movement. Data obtained agree with the suggestion that for transition from ceramic brittle to ductile failure occurrence of some critical vacancy concentration within it is necessary. Independent of ceramic crystal size and test conditions the secondary creep rate and time to failure are constant, and deformation to failure is also constant.
Refractories and Industrial Ceramics – Springer Journals
Published: Dec 8, 2015
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud