科研之友
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摘要
Spark plasma sintering (SPS) of a codoped alpha-alumina powder has been investigated at temperatures between 850 and 1200 degrees C. The "grain size versus relative density" trajectory showed a significant grain growth as soon as the residual porosity closed. The densification mechanism was determined by anisothermal (investigation of the heating part of a SPS run) and isothermal methods. It was proposed that grain-boundary sliding, accommodated by oxygen grain-boundary diffusion, governed densification.
- 出版日期2009-1
