High-temperature properties of extruded titanium composites fabricated from carbon nanotubes coated titanium powder by spark plasma sintering and hot extrusion

High temperature tensile test was conducted to study high temperature properties of the magnesium based composites reinforced with SiC particulates and monolithic magnesium as well. It was found that tensile strength of monolithic magnesium and Mg-SiC composites decreased with an increase in testing temperature. While the elongation to failure both samples were increased when increasing temperature. At all testing temperature, the tensile strength of the composite sample was found to be superior compared to monolithic magnesium due to presence of SiC particulates and efficiency of spark plasma sintering process in fabrication of the composites.

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Properties of large scale ultra-high temperature ceramic matrix composites made by filament winding and spark plasma sintering

Composites Part B Engineering ◽

10.1016/j.compositesb.2021.108839 ◽

2021 ◽

pp. 108839

Author(s):

D. Sciti ◽

P. Galizia ◽

T. Reimer ◽

A. Schoberth ◽

C.F. Gutierrez-Gonzalez ◽

...

Keyword(s):

High Temperature ◽

Spark Plasma Sintering ◽

Large Scale ◽

Ceramic Matrix Composites ◽

Ceramic Matrix ◽

Filament Winding ◽

Matrix Composites ◽

Plasma Sintering ◽

Spark Plasma ◽

Ultra High Temperature

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Enhancement of Electrical Conductivity of Aluminum-Based Nanocomposite Produced by Spark Plasma Sintering

Nanomaterials ◽

10.3390/nano11051150 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1150

Author(s):

Nicolás A. Ulloa-Castillo ◽

Roberto Hernández-Maya ◽

Jorge Islas-Urbano ◽

Oscar Martínez-Romero ◽

Emmanuel Segura-Cárdenas ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrical Conductivity ◽

Spark Plasma Sintering ◽

Experimental Tests ◽

Powder Morphology ◽

Plasma Sintering ◽

Multi Walled Carbon Nanotubes ◽

Spark Plasma ◽

Ball Milling Technique ◽

Walled Carbon Nanotubes

This article focuses on exploring how the electrical conductivity and densification properties of metallic samples made from aluminum (Al) powders reinforced with 0.5 wt % concentration of multi-walled carbon nanotubes (MWCNTs) and consolidated through spark plasma sintering (SPS) process are affected by the carbon nanotubes dispersion and the Al particles morphology. Experimental characterization tests performed by scanning electron microscopy (SEM) and by energy dispersive spectroscopy (EDS) show that the MWCNTs were uniformly ball-milled and dispersed in the Al surface particles, and undesirable phases were not observed in X-ray diffraction measurements. Furthermore, high densification parts and an improvement of about 40% in the electrical conductivity values were confirmed via experimental tests performed on the produced sintered samples. These results elucidate that modifying the powder morphology using the ball-milling technique to bond carbon nanotubes into the Al surface particles aids the ability to obtain highly dense parts with increasing electrical conductivity properties.

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