标题： 等离子体氮化反应器的构建和温度分布的模拟 显示英文标题

标题： Construcción de un reactor de nitruración por plasma y simulación de la distribución de temperaturas

摘要： 通过等离子放电进行离子渗氮和离子渗碳是修改奥氏体钢表面的有前途的技术。 等离子处理可以提高机械性能，例如硬度和耐磨性。 实际上，这些技术不会改变奥氏体的自然特性，如耐腐蚀性。 系统的隐藏参数对于进行良好的表征和实验可重复性非常重要。 在这项工作中，已经设计了一种新的阴极，并将其放置在一个新的等离子反应器中。 由于一种特殊的固定程序，奥氏体样品的电场边缘效应已被排除。 在对这个新装置进行实验验证后，进行了数值模拟。 使用阴极分子氮碰撞方法分析了温度分布。 在这些假设下，反应器冷却是一个关键问题。 在用并行雅可比法求解拉普拉斯方程之后进行了此模拟。 最后，使用光学发射光谱验证了传热机制是传导，并将实验数据与模拟数据进行了比较。 显示英文摘要

摘要： Ion nitriding and ion carburising by plasma discharges are promising techniques in order to modify the surface of austenitic steels. Plasma treatments improve mechanical properties, e.g., hardness and wear resistance. Indeed, these techniques do not change the natural austenitic properties, like corrosion resistance. Hidden parameters of the system are very important in order to do a good characterization and a good experimental reproducibility. In this work a new cathode design has been done and it is placed in a new plasma reactor. The electric field edge effect has been discarded in the austenitic samples thanks to a special lodging procedure. After an experimental validation of this new set-up, a numerical simulation has been carried out. Temperature distribution has been analyzed using the cathode-molecular nitrogen collision method. Under these assumptions, reactor cooling is a key issue. This simulation has been done after the resolution of the Laplace equation with the parallel Jacobi method. Finally, using optical emission spectroscopy it has been verified that the heat transfer mechanism is the conduction and the experimental data have been compared with simulation data.