Title

Making Nanostructured Ceramics From Micrometer-Sized Powders Via Grain Refinement During Sps Sintering

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.

Publication Date

8-1-2008

Publication Title

Journal of the American Ceramic Society

Volume

91

Issue

8

Number of Pages

2475-2480

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/j.1551-2916.2008.02490.x

Socpus ID

49549090422 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/49549090422

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