Fabrication Of Carbon Nanotube - Chromium Carbide Composite Through Laser Sintering

Keywords

Carbon nanotube; Ceramic composite; Laser sintering

Abstract

Ceramics often have high hardness and strength, and good wear and corrosion resistance, and hence have many important applications, which, however, are often limited by their poor fracture toughness. Carbon nanotubes (CNTs) may enhance ceramic fracture toughness, but hot pressing (which is one typical approach of fabricating CNT-ceramic composites) is difficult to apply for applications that require localized heat input, such as fabricating composites as surface coatings. Laser beam may realize localized material sintering with little thermal effect on the surrounding regions. However, for the typical ceramics for hard coating applications (as listed in Ref.[1]), previous work on laser sintering of CNT-ceramic composites with mechanical property characterizations has been very limited. In this paper, research work has been reported on the fabrication and characterization of CNT-ceramic composites through laser sintering of mixtures of CNTs and chromium carbide powders. Under the studied conditions, it has been found that laser-sintered composites have a much higher hardness than that for plasma-sprayed composites reported in the literature. It has also been found that the composites obtained by laser sintering of CNTs and chromium carbide powder mixtures have a fracture toughness that is ~23 % higher than the material obtained by laser sintering of chromium carbide powders without CNTs.

Publication Date

3-1-2016

Publication Title

Lasers in Manufacturing and Materials Processing

Volume

3

Issue

1

Number of Pages

1-8

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s40516-015-0019-y

Socpus ID

85028357660 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85028357660

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