The active screen plasma nitrocarburizing technology is an improvement of conventional plasma nitrocarburizing by providing a homogeneous temperature distribution within the workload and reducing soot formation. In this study, an industrial-scale active screen (AS) made of carbon-fibre-reinforced carbon serves as the cathode as well as the carbon source for the plasma-chemical processes taking place. The pulsed dc discharge was maintained at a few mbar of pressure while simultaneously being fed with a mixed gas flow of hydrogen and nitrogen ranging from 10 to 100 slh. Using in situ infrared laser absorption spectroscopy with lead salt tuneable diode lasers and external-cavity quantum cascade lasers, the temperatures and concentrations of HCN, NH 3 , CH 4 , C 2 H 2 , and CO have been monitored as a function of pressure and total gas flow. To simulate industrial treatment conditions the temperature of the sample workload in the centre of ...

中文翻译：

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工业规模的碳活性筛用于等离子体氮碳共渗过程的光谱学研究

有源筛网等离子氮碳共渗技术是对常规等离子氮碳共渗技术的改进，它在工作负荷内提供了均匀的温度分布并减少了烟灰的形成。在这项研究中，由碳纤维增强的碳制成的工业规模的有源筛（AS）用作阴极以及发生等离子体化学过程的碳源。脉冲直流放电保持在几毫巴的压力，同时供给氢气和氮气的混合气体流量为10到100 slh。使用铅盐可调谐二极管激光器和外腔量子级联激光器的原位红外激光吸收光谱，已监测了HCN，NH 3，CH 4，C 2 H 2和CO的温度和浓度随压力和压力的变化。总气体流量。