| Nitriding molybdenum： Effects of duration and fill gas pressure when using lO0-Hz pulse DC discharge technique |
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| 基金项目： | This work was supported by the Higher Education Com- mission （HEC） of Pakistan under a research project. One of the authors （U. Ikhlaq） is grateful to HEC for providing finan- cial support during her PhD research work. |
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| 摘 要： | ![]()
Molybdenum is nitrided by a 100-Hz pulsed DC glow discharge technique for various time durations and fill gas pressures to study the effects on the surface properties of molybdenum. X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, and atomic force microscopy （AFM） are used for the structural and morphological analysis of the nitrided layers. Vickers＇ microhardness tester is utilized to investigate surface microhardness. Phase analysis shows the formation of more molybdenum nitride molecules for longer nitriding durations at fill gas pressures of 2 mbar and 3 mbar （1 bar = 105 Pa）. A considerable increase in surface microhardness （approximately by a factor of 2） is observed for longer duration （10 h） and 2-mbar pressure. Longer duration （10 h） and 2-mbar fill gas pressure favors the formation of homogeneous, smooth, hard layers by the incorporation of more nitrogen.
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| 关 键 词： | 持续时间 气体压力 放电技术 脉冲直流 氮化钼 扫描电子显微镜 赫兹 填充气体 |
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