Title

Microscopic And Spectroscopic Characterization Of Nano-Tungsten Powders

Abstract

Extensive attention has been paid to the consolidation of nanoparticles into nanocrystalline components that possess better properties than their coarse-grained counterparts. Nanocrystalline monolithic tungsten (W) has been envisaged to improve the performance of many military components. We have examined the microscopic and spectroscopic characteristics of commercially available nano-W powders. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Auger electron spectroscopy, laser dynamic scattering, and BET measurement were employed. While the bulk of nano-W powders consisted of bcc-W based on XRD and TEM, much of their surface consisted of WO3 with traces of WO 2 and WC. Despite the irregular morphology and agglomerates greater than 1 μm in size, the diameter of individual nano-tungsten powders ranged from 30 to 100 nm with a surface area of 10.4 m2/g. A knowledge of the microstructural and spectroscopic characteristics will help in the design of appropriate dispersion and compaction techniques to achieve fully-dense nanocrystalline monolithic W.

Publication Date

12-1-2008

Publication Title

Proceedings of the 7th International Conference on Tungsten, Refractory and Hardmaterials

Number of Pages

590-597

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84883217730 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84883217730

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