O471.3 99032009半导体量子阱中自由激子稳态荧光特征=Intensityrelationship between excitation and the steadystate photoluminescence of free excitons insemiconductor quantum wells[刊,中]/金世荣,郑燕兰,林春,钟金权,李爱珍(...O471.3 99032009半导体量子阱中自由激子稳态荧光特征=Intensityrelationship between excitation and the steadystate photoluminescence of free excitons insemiconductor quantum wells[刊,中]/金世荣,郑燕兰,林春,钟金权,李爱珍(中科院上海冶金研究所.信息功能材料国家重点实验室.上海(200050))//物理学报.—1998,47(1).展开更多
Vanadium carbide/titanium carbide （VC/TiC） superlattice films were synthesized by magnetron sputtering method. The effects of modulation period on the microstructure evolution and mechanical properties were investig...Vanadium carbide/titanium carbide （VC/TiC） superlattice films were synthesized by magnetron sputtering method. The effects of modulation period on the microstructure evolution and mechanical properties were investigated by EDXA, XRD, HRTEM and nano-indentation. The results reveal that the VC/TiC superlattice films form an epitaxial structure when their modulation period is less than a critical value, accompanied with a remarkable increase in hardness. Further increasing the modulation period, the hardness of superlattices decreases slowly to the rule-of-mixture value due to the destruction of epitaxial structures. The XRD results reveal that three-directional strains are generated in superlattices when the epitaxial structure is formed, which may change the modulus of constituent layers. This may explain the remarkable hardness enhancement of VC/TiC superlattices.展开更多
文摘O471.3 99032009半导体量子阱中自由激子稳态荧光特征=Intensityrelationship between excitation and the steadystate photoluminescence of free excitons insemiconductor quantum wells[刊,中]/金世荣,郑燕兰,林春,钟金权,李爱珍(中科院上海冶金研究所.信息功能材料国家重点实验室.上海(200050))//物理学报.—1998,47(1).
基金Project(51201187)supported by the National Natural Science Foundation of China
文摘Vanadium carbide/titanium carbide （VC/TiC） superlattice films were synthesized by magnetron sputtering method. The effects of modulation period on the microstructure evolution and mechanical properties were investigated by EDXA, XRD, HRTEM and nano-indentation. The results reveal that the VC/TiC superlattice films form an epitaxial structure when their modulation period is less than a critical value, accompanied with a remarkable increase in hardness. Further increasing the modulation period, the hardness of superlattices decreases slowly to the rule-of-mixture value due to the destruction of epitaxial structures. The XRD results reveal that three-directional strains are generated in superlattices when the epitaxial structure is formed, which may change the modulus of constituent layers. This may explain the remarkable hardness enhancement of VC/TiC superlattices.
