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Making Nanostructured Ceramics From Micrometer-Sized Powders Via Grain Refinement During Sps Sintering
Authors
Kepi Chen
Hui Wang
+3 more
Ligong Zhang
Xiaowen Zhang
Jing Zhu
Publication date
1 August 2008
Publisher
'Information Bulletin on Variable Stars (IBVS)'
Abstract
In this paper, we have demonstrated that dense bulk nanostructured ceramics can be synthesized from micrometer-sized powders by using an electrical field-activated sintering process. A dense Pb(Mg1/3Nb 2/3)O3-PbTiO3 ceramic with grain sizes of 20-100 nm was obtained from the starting powder of 1 to 10 μm. Structural and property analysis confirmed that the entire specimen is composed of nano-sized grains. The significant microstructural refining is attributed to a pulsed electric field-induced thermo-mechanical fatigue process, which in situ shattered the large particles into nano-sized grains during sintering. An advantage of this technique over the previous ones is that it avoids the usage of ultrafine nanometer-sized powders, which are difficult to process and mass produce in an economic and consistent way. In principle, the process demonstrated here can be applied to other material systems. © 2008 The American Ceramic Society
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Last time updated on 18/10/2022