Premium
Fundamental and Innovations in Plasma Assisted Diffusion of Nitrogen and Carbon in Austenitic Stainless Steels and Related Alloys
Author(s) -
Czerwiec Thierry,
He Huan,
Marcos Grégory,
Thiriet Tony,
Weber Sylvain,
Michel Henri
Publication year - 2009
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200930003
Subject(s) - carburizing , austenite , nitriding , materials science , phase (matter) , metallurgy , carbon fibers , plasma , nitrogen , diffusion , layer (electronics) , microstructure , composite material , thermodynamics , chemistry , composite number , physics , organic chemistry , quantum mechanics
An improvement of the surface properties of austenitic stainless steels and nickel‐based alloys is obtained by low temperature plasma assisted nitriding (PAN), plasma assisted carburizing (PAC) and plasma assisted nitrocarburizing (PANC). At low temperature, PAN treatment produces a peculiar phase usually called expanded austenite, S phase, m phase or γ N phase. Replacing nitrogen by hydrocarbon for conducting a low temperature PAC gives a carburized layer containing the carbon expanded austenite phase ( γ C ). These two phases can simultaneously be obtained by combining hydrocarbon and nitrogen in the gas phase through a low temperature PANC. Several fundamental aspects concerning the expanded austenite phases are presented in this paper.