Hollow cathode discharge: application of a deposition treatment in the iron sintering

Abstract

The influence of a previous deposition treatment on the final amount of alloying elements (Cr and Ni)

Plasma assisted parts' manufacturing: sintering and surface texturing - part I - influence of sintering time and temperature

“…The hollow cathode effect also causes an increase of the current density at low pressures (normally between 1 and 9 Torr, in accordance with Brunatto et al (2008), in response to an exponential multiplication of electrons produced by ionization in Paper accepted December, 2009. Technical Editor: Anselmo Eduardo Diniz cathode sheaths (Kolobov and Tsendin, 1995).…”

“…The results presented here indicate the hollow cathode discharge could be applied to develop a new green technology for surface texturing, becoming a new technique to improve surface properties such as roughness and morphology. These properties are important parameters for many applications directly related to the coatings adhesion, tribological performance, and others, in accordance with Gupta et al (2007), Basnyat et al (2008), and Krupka et al (2008). …”

“…The possibility of altering the material surface's characteristics by exposing it to the plasma species has led to the development of new techniques and applications (nitriding, sputtering, deposition, sintering…), which have demanded special attention of researchers in the metallurgicalmechanical field (Brunatto et al, 2008).…”

Plasma assisted parts' manufacturing: sintering and surface texturing - part II - influence of inter-cathode distance and gas pressure

“…The results presented here indicate that the hollow cathode discharge could be applied to develop a new green technology for surface texturing, becoming a new technique to improve surface properties such as roughness and morphology. These properties are significant parameters for many applications directly related to the coatings adhesion, tribological performance, and others, according to Gupta et al (2007), Basnyat et al (2008), and Krupka et al (2008).…”

“…1 As presented in Part I, the metallic parts processed by means of DC abnormal glow discharge (Chapman, 1980;Muzart et al, 1997) and hollow cathode discharge (HCD) present characteristics that are directly related to the cleaning, heating and/or sputtering effects caused by plasma species (ions and neutrals) bombardment phenomenon (v. Engel, 1994;Koch et al, 1991;Kolobov and Tsendin, 1995;Benda et al, 1997;Koch et al, 1991;Brunatto et al, 2005;Brunatto et al, 2008). In addition, the acquirements and potentiality universe of these effects on the manufactured parts' surface characteristics are far-away from being finished.…”