Title

Plasma Engineered Nanostructured Spherical Aluminum Oxide Powders

Keywords

Atomization; Grain Refinement; Nanostructured Powders; Plasma Spraying; Rapid Solidification; Spheroidization

Abstract

Plasma atomization results in spheroidization of irregular shaped alumina particles producing narrow size ranged distribution of nanostructured powders. The range of cooling rates, obtained from the different quenching media viz. air, water and liquid nitrogen, provides insight to morphological feasibility in refinement of grain size. Plasma engineered powder particles observed cooling rates in the order of 106-108/s and developed nanosize crystallites while solidification. X-Ray Diffraction methods have been utilized to quantify the crystallite size obtained with different quenching medias. SEM studies provided a detailed understanding and salient structural morphology characteristics of spheroidized plasma sprayed alumina powders. Formation of nano-grains and novel metastable phases were endorsed by TEM investigations.

Publication Date

7-14-2004

Publication Title

MPMD Fifth Global Innovations Proceedings, Surfaces and Interfaces in Nanostructured Materials and Trends in LIGA, Miniaturization, and Nanoscale Materials

Number of Pages

103-112

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

3042827009 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/3042827009

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