ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The Vickers hardness of dense Si3N4 ceramics of the Si-Ce-Al-O-N system was investigated from room temperature to 1200°C. A sloppy decrease of hot hardness occurred above 850–900°C. A compensation law was observed between the pre-exponential factors of the hot-hardness dependence on the reciprocal of absolute temperature, and the values of the activation energy of hardness. This relationship shows that the low-temperature deformation mechanism, such as microplasticity, is competing in parallel with a grain-boundary diffusion-controlled creep process in the high-temperature range.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00351569
Permalink