Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis
Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis
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DOI：
10.1557/jmr.2009.0025
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发表时间：
2009-01
影响因子：
2.7
通讯作者：
G. Bernard-Granger;C. Guizard
中科院分区：
文献类型：
--
作者：
G. Bernard-Granger;C. Guizard
在850 ~ 1200 °C温度范围内研究了共掺杂α-氧化铝粉末的放电等离子烧结（SPS）。“晶粒尺寸与相对密度”的轨迹表明，一旦残余孔隙关闭，晶粒就会显著长大。致密化机制是由非等温（调查的SPS运行的加热部分）和等温方法。有人提出，晶界滑动，容纳氧晶界扩散，支配致密化。
Spark plasma sintering (SPS) of a codoped α-alumina powder has been investigated at temperatures between 850 and 1200 °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.