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Optimization Study of Pulsed DC Nitrogen-Hydrogen Plasma in the Presence of an Active Screen Cage 被引量:4
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作者 A.SAEED A.W.KHAN +5 位作者 F.JAN H.U.SHAH m.ABRAR m.zaka-ui-islam m.KHALID m.ZAKAULLAH 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第5期460-464,共5页
A glow discharge plasma nitriding reactor in the presence of an active screen cage is optimized in terms of current density,filling pressure and hydrogen concentrations using optical emission spectroscopy(OES).The s... A glow discharge plasma nitriding reactor in the presence of an active screen cage is optimized in terms of current density,filling pressure and hydrogen concentrations using optical emission spectroscopy(OES).The samples of AISI 304 are nitrided for different treatment times under optimum conditions.The treated samples were analyzed by X-ray diffraction(XRD) to explore the changes induced in the crystallographic structure.The XRD pattern confirmed the formation of iron and chromium nitrides arising from incorporation of nitrogen as an interstitial solid solution in the iron lattice.A Vickers microhardness tester was used to evaluate the surface hardness as a function of treatment time(h).The results showed clear evidence of improved surface hardness and a substantial amount of decrease in the treatment time compared with the previous work. 展开更多
关键词 optical diagnostics plasma nitriding austenitic stainless steel
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