DC-magnetron sputtering was employed to prepare Fe-N/Ti-N periodic nano-multilayers . Magnetic properties were studied by vibrating sample magnetometry and structure by TEM and X-ray diffraction for the films. A stron...DC-magnetron sputtering was employed to prepare Fe-N/Ti-N periodic nano-multilayers . Magnetic properties were studied by vibrating sample magnetometry and structure by TEM and X-ray diffraction for the films. A strong enhancement of the saturation magnetization was found in multilayers containing thinner Fe-N layers. The coercivity was found to be nearly constant. A kind of anomalous hysteresis loops was found in some展开更多
The promise for industrial applications offered by iron aluminides is today restricted by insufficient ductility at room temperature and mediocre strength and creep resistance at high temperatures. The tendency to emb...The promise for industrial applications offered by iron aluminides is today restricted by insufficient ductility at room temperature and mediocre strength and creep resistance at high temperatures. The tendency to embrittlement in the presence of hydrogen or water vapour limits the ductility even more. The atomic arrangements in binary and alloyed variants are examined here and related to the difficulties of dislocation propagation at room and at high temperatures. In this way the influence of intrinsic structure and alloying modifications on mechanical behaviour can be understood. Possibilities for further improving properties through structure control are considered.展开更多
A high precision forecasting and prospecting model incorporating the “field theory field structure analysis field simulation”, a temporal and spatial structural framework reflecting local extremely fine structure...A high precision forecasting and prospecting model incorporating the “field theory field structure analysis field simulation”, a temporal and spatial structural framework reflecting local extremely fine structures, is established to make an effective extraction and an integrated analysis of multivariate forecasting information. This model can best show not only the coupling between metallogenic anomalous structure, mineralized structure and information structure, but also the extraction, optimization, matching and summarization of key forecasting information. The technological keys to this model are the fine structural analysis of geological and geophysical and geochemical anomalous fields and metallogenic fields, and the establishment of occurrence patterns for the spatial location of orebodies.展开更多
文摘DC-magnetron sputtering was employed to prepare Fe-N/Ti-N periodic nano-multilayers . Magnetic properties were studied by vibrating sample magnetometry and structure by TEM and X-ray diffraction for the films. A strong enhancement of the saturation magnetization was found in multilayers containing thinner Fe-N layers. The coercivity was found to be nearly constant. A kind of anomalous hysteresis loops was found in some
文摘The promise for industrial applications offered by iron aluminides is today restricted by insufficient ductility at room temperature and mediocre strength and creep resistance at high temperatures. The tendency to embrittlement in the presence of hydrogen or water vapour limits the ductility even more. The atomic arrangements in binary and alloyed variants are examined here and related to the difficulties of dislocation propagation at room and at high temperatures. In this way the influence of intrinsic structure and alloying modifications on mechanical behaviour can be understood. Possibilities for further improving properties through structure control are considered.
基金Thispaperisco sponsoredbytheStateKeyBasicResearchProject(G1 9990 4 32 0 7 3) byBackboneTeacherResearchProjectundertheMin i
文摘A high precision forecasting and prospecting model incorporating the “field theory field structure analysis field simulation”, a temporal and spatial structural framework reflecting local extremely fine structures, is established to make an effective extraction and an integrated analysis of multivariate forecasting information. This model can best show not only the coupling between metallogenic anomalous structure, mineralized structure and information structure, but also the extraction, optimization, matching and summarization of key forecasting information. The technological keys to this model are the fine structural analysis of geological and geophysical and geochemical anomalous fields and metallogenic fields, and the establishment of occurrence patterns for the spatial location of orebodies.
