Effect of Pulsed Current and Mold Material for Pulsed Current Sintering.

Carbon-Dispersed WCFeAl Hard Material Fabricated by Mechanical Milling and Subsequent Pulsed Current Sintering

A new metal mold material for pulsed current sintering (PCS) methods at high temperatures with higher electrical resistivity than cemented carbide molds, was fabricated using mechanical milling and PCS. The constituent (100 1 x)(WC­10 or 30FeAl) + xC (x = 0­8; mass%) hard material with dispersed spherical carbon particles were synthesized via mechanical milling of the source powders and PCS. Th...

Sintering and Heat Treatment of Titanium Alloys by Pulsed Electric Current Sintering

Pulsed eddy current empirical modeling

The pulsed eddy current responses to varying material thickness and conductivity are modeled using an electrical circuit ideal transformer non-linear model. The Levenberg-Marquardt algorithm is used to curve fit the experimental signal to the model. The resulting synthetic signal is examined for its ability to preserve experimental signal features such as lift-off point of intersection (LOI), a...

Effect of pulsed current densities on co-electrodeposition of Graphene Oxide/ Calcium-Phosphate coatings and their biocompatibility

In this study, calcium-phosphate (Ca-P) and graphene oxide (GO)/ calcium-phosphate (Ca-P) coatings were electrodeposited with different pulsed current densities on TiO2 nanotubes. Results showed that the co-electrodeposition rate in the presence of GO, especially at low current densities of 2 and 5 mA/cm2, significantly decreased. This might be due to the large size of GO sheets as compared to ...

Development of Zirconium Thin Films by Pulsed Direct Current Magnetron Sputtering: Effect of Pulsed Parameters

This paper characterizes phases present in thin Zr films at 773 K of substrate temperature. The effect of pulsed parameters such as pulse frequency, duty cycle and pulse power during the deposition of Zr film on Si(100) at the substrate temperature of 773 K has been studied. Formation of α-phase of zirconium was noticed with (001) preferred orientation at 773 K. Preferred orientation was found ...