故障预测与管理技术(Prognostics and Health Management,PHM)是现代武器装备实现新型自主式后勤保障的关键技术,能够实现故障检测、诊断、预测、状态评估以及综合决策的功能,能够降低维修、使用和保障费用,提高战备完好率、任务成功率...故障预测与管理技术(Prognostics and Health Management,PHM)是现代武器装备实现新型自主式后勤保障的关键技术,能够实现故障检测、诊断、预测、状态评估以及综合决策的功能,能够降低维修、使用和保障费用,提高战备完好率、任务成功率以及安全性和可用性;对PHM方法技术发展、作用以及国内外发展现状进行了详细的介绍和总结,并针对导弹维修保障中PHM方法的应用进行了调研,提出导弹维修保障综合PHM的基本概念、体系构建方法以及存在的技术难点,最后进行了展望和总结。展开更多
A FeCrSiBMn amorphous/nanocrystalline coating with 700 μm in thickness and 0.65% in porosity, was prepared by high velocity oxygen fuel(HVOF) spraying process. The long-term corrosion behavior of the FeCrSiBMn coatin...A FeCrSiBMn amorphous/nanocrystalline coating with 700 μm in thickness and 0.65% in porosity, was prepared by high velocity oxygen fuel(HVOF) spraying process. The long-term corrosion behavior of the FeCrSiBMn coating was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) tests in a 3.5% NaCl solution with a hard chromium coating as a reference. The FeCrSiBMn coating exhibited higher corrosion potential and lower corrosion current density than the hard chromium coating. The pore resistance(Rp) and charge transfer resistance(Rct) of FeCrSiBMn coating were higher than those of the hard chromium coating. In addition, after immersion in the Na Cl solution for 28 d, only small pores in the FeCrSiBMn coating were observed. All the results indicated that the FeCrSiBMn coating held superior corrosion resistance to the hard chromium coating. This could be attributed to the dense structure, low porosity and amorphous/nanocrystalline phases of the FeCrSiBMn coating.展开更多
文摘故障预测与管理技术(Prognostics and Health Management,PHM)是现代武器装备实现新型自主式后勤保障的关键技术,能够实现故障检测、诊断、预测、状态评估以及综合决策的功能,能够降低维修、使用和保障费用,提高战备完好率、任务成功率以及安全性和可用性;对PHM方法技术发展、作用以及国内外发展现状进行了详细的介绍和总结,并针对导弹维修保障中PHM方法的应用进行了调研,提出导弹维修保障综合PHM的基本概念、体系构建方法以及存在的技术难点,最后进行了展望和总结。
文摘A FeCrSiBMn amorphous/nanocrystalline coating with 700 μm in thickness and 0.65% in porosity, was prepared by high velocity oxygen fuel(HVOF) spraying process. The long-term corrosion behavior of the FeCrSiBMn coating was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) tests in a 3.5% NaCl solution with a hard chromium coating as a reference. The FeCrSiBMn coating exhibited higher corrosion potential and lower corrosion current density than the hard chromium coating. The pore resistance(Rp) and charge transfer resistance(Rct) of FeCrSiBMn coating were higher than those of the hard chromium coating. In addition, after immersion in the Na Cl solution for 28 d, only small pores in the FeCrSiBMn coating were observed. All the results indicated that the FeCrSiBMn coating held superior corrosion resistance to the hard chromium coating. This could be attributed to the dense structure, low porosity and amorphous/nanocrystalline phases of the FeCrSiBMn coating.
