Ceramic/metal nanocomposites by lyophilization: Processing and HRTEM study

作者：Gutierrez Gonzalez C F; Agouram S; Torrecillas R; Moya J S; Lopez Esteban S^*

来源：Materials Research Bulletin, 2012, 47(2): 285-289.

DOI：10.1016/j.materresbull.2011.11.027

• Composites
• Nanostructures
• Freeze-drying
• Electron microscopy
• Microstructure

This work describes a wet-processing route based on spray-freezing and subsequent lyophilization designed to obtain nanostructured ceramic/metal powders. Starting from the ceramic powder and the corresponding metal salt, a water-based suspension is sprayed on liquid nitrogen. The frozen powders are subsequently freeze-dried, calcined and reduced. The material was analyzed using X-ray diffraction analysis at all stages. High resolution transmission electron microscopy studies showed a uniform distribution of metal nanoparticles on the ceramic grain surfaces, good interfaces and high crystallinity, with an average metal particle size in the nanometric range.

• 出版日期2012-2