Yield Strength of Transparent MgAl2O4 Nano-Ceramic at High Pressure and Temperature
We report here experimental results of yield strength and stress relaxation measurements of transparent MgAl 2 O 4 nano-ceramics at high pressure and temperature. During compression at ambient temperature, the differential strain deduced from peak broadening increased significantly with pressure up...
Saved in:
Published in | Nanoscale research letters Vol. 5; no. 8; pp. 1329 - 1332 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer New York
23.05.2010
Springer |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | We report here experimental results of yield strength and stress relaxation measurements of transparent MgAl
2
O
4
nano-ceramics at high pressure and temperature. During compression at ambient temperature, the differential strain deduced from peak broadening increased significantly with pressure up to 2 GPa, with no clear indication of strain saturation. However, by then, warming the sample above 400°C under 4 GPa, stress relaxation was obviously observed, and all subsequent plastic deformation cycles are characterized again by peak broadening. Our results reveal a remarkable reduction in yield strength as the sintering temperature increases from 400 to 900°C. The low temperature for the onset of stress relaxation has attracted attention regarding the performance of transparent MgAl
2
O
4
nano-ceramics as an engineering material. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1931-7573 1556-276X |
DOI: | 10.1007/s11671-010-9647-5 |