AZ91镁合金稀土表面改性的研究

研究了采用稀土多元共渗方法提高AZ91镁合金表面耐腐蚀性能的作用。结果表明,该方法可以有效地改善镁合金表面耐全面腐蚀、点蚀的性能,提高镁合金表面在温热潮湿环境下的稳定性。经过稀土渗入处理后的镁合金,显微组织均匀、致密,有利于耐蚀性的提高。     

Thermal Shift of Energy Levels in the Eu~(2+)-Doped Strontium Chlorophosphate

The thermal shift of 5d energy level of Eu~(2+) doped in Sr_5(PO_4)_3Cl have been measured in 10～700 K.A simulation calculation was worked out with a modified theoretical equation.     

炭/炭复合材料的摩擦磨损性能及应用

论述了炭／炭复合材料的特点，结合该材料在飞机刹车盘中的具体应用，讨论了炭／炭复合材料在不同环境气氛下的摩擦磨损行为及其影响因素，并阐明了炭／炭复合材料的研究现状和尚需解决的问题。     

Photostimulated Luminescence and F-centers of Sr_3Ca_2(PO_4)_3X:Eu~(2+)(X=F,Cl,Br)

This paper reports the F-centers and photostimulated luminescence of Eu~(2+)-activated Sr_3Ca_2(PO_4)_3Xcrystals.The influence of various halide ions on the F-centers and their energy level is discussed.The mechanismfor the photostimulated luminescence and valence change of Eu ion in that process have been investigated.