Open AccessCathodic Cage Plasma Nitriding: An Innovative Technique
Author(s) -
Rômulo Ríbeiro Magalhães de Sousa,
F.O. de Araújo,
J.A.P. da Costa,
Ayrton de Sá Brandim,
R.A. de Brito,
Clodomiro Alves
Publication year - 2012
Publication title -
journal of metallurgy
Language(s) - English
Resource type - Journals
eISSN - 1687-9473
pISSN - 1687-9465
DOI - 10.1155/2012/385963
Subject(s) - nitriding , materials science , cathodic protection , indentation hardness , plasma , metallurgy , cage , diffraction , ionic bonding , optical microscope , enhanced data rates for gsm evolution , composite material , ion , layer (electronics) , scanning electron microscope , microstructure , anode , optics , structural engineering , chemistry , electrode , computer science , engineering , telecommunications , quantum mechanics , physics , organic chemistry
Cylindrical samples of AISI 1020, AISI 316, and AISI 420 steels, with different heights, were simultaneously treated by a new technique of ionic nitriding, entitled cathodic cage plasma nitriding (CCPN), in order to evaluate the efficiency of this technique to produce nitrided layers with better properties compared with those obtained using conventional ionic nitriding technique. This method is able to eliminate the edge effect in the samples, promoting a better uniformity of temperature, and consequently, a smaller variation of the thickness/height relation can be obtained. The compound layers were characterized by X-ray diffraction, optical microscopy, and microhardness test profile. The results were compared with the properties of samples obtained with the conventional nitriding, for the three steel types. It was verified that samples treated by CCPN process presented, at the same temperature, a better uniformity in the thickness and absence of the edge effect
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