Vanadium alloys, especially that of V4Cr4Ti, are supposed as the promising candidate structural material for fusion applications for their good thermal properties, high temperature strength and the inherent low activa...Vanadium alloys, especially that of V4Cr4Ti, are supposed as the promising candidate structural material for fusion applications for their good thermal properties, high temperature strength and the inherent low activation characteristics. However, in展开更多
Tungsten is envisaged as one of the main candidate materials for divertor plate of ITER and future fusion reactors. Due to D-T reaction, PFMs would suffer helium irradiation from plasma additional to the high heat loa...Tungsten is envisaged as one of the main candidate materials for divertor plate of ITER and future fusion reactors. Due to D-T reaction, PFMs would suffer helium irradiation from plasma additional to the high heat loads. Helium retention and thermal desorption behavior are largely concerned.展开更多
Carbon-base materials will be major plasma facing materials (PFM) in a fusion device in near term and even in the future in spite of its high tritium trapping and chemical sputtering yield. Of course, the development ...Carbon-base materials will be major plasma facing materials (PFM) in a fusion device in near term and even in the future in spite of its high tritium trapping and chemical sputtering yield. Of course, the development of high Z PFM and free surface system are also important for fusion energy.展开更多
There are more and more countries to ake an effort to the studies of vanadium alloy for fusion application. NIFS in Japan has recently developed an 80 kg heat V4Cr4Ti alloy (NIFS-heat 2) after the production of a 500 ...There are more and more countries to ake an effort to the studies of vanadium alloy for fusion application. NIFS in Japan has recently developed an 80 kg heat V4Cr4Ti alloy (NIFS-heat 2) after the production of a 500 kg scale V4Cr4Ti in U. S. several years ago. Property evaluation of the alloy has beenput into an international collaboration program under the coordination of IEA (International Energy Agency). SWIP has joined the collabration on the hydrogen embrittlement resistance evaluation of the alloyt.展开更多
It is well known that vanadium alloy will face to strong neutron irradiation and hydrogen environments as a structural material in a fusion reactor. Some researches have reported that vanadium alloy took strongly hard...It is well known that vanadium alloy will face to strong neutron irradiation and hydrogen environments as a structural material in a fusion reactor. Some researches have reported that vanadium alloy took strongly hardening after an exposure to hydrogen environment and irradiation by neutron at a temperature lower than 400℃. The ductility of the alloy was lost largely, even entirely brittle fracture occurred sometimes in tension loading of the alloy. Therefore, it's to get the knowledge of the hardening mechanism and the fracture mechanical for the purpose to improve the performances of the alloy under the circumstances.展开更多
Recent West Nile virus epidemics in USA drawworldwide concerns. Here the basic biological and epidemi-ological features of the virus are analyzed along with thespecial immunity of humans and animals, the immigration o...Recent West Nile virus epidemics in USA drawworldwide concerns. Here the basic biological and epidemi-ological features of the virus are analyzed along with thespecial immunity of humans and animals, the immigration ofbirds and the natural environments in China. The risk ofsevere hazards to China caused by West Nile virus is assessednot high thereafter.展开更多
文摘Vanadium alloys, especially that of V4Cr4Ti, are supposed as the promising candidate structural material for fusion applications for their good thermal properties, high temperature strength and the inherent low activation characteristics. However, in
文摘Tungsten is envisaged as one of the main candidate materials for divertor plate of ITER and future fusion reactors. Due to D-T reaction, PFMs would suffer helium irradiation from plasma additional to the high heat loads. Helium retention and thermal desorption behavior are largely concerned.
文摘Carbon-base materials will be major plasma facing materials (PFM) in a fusion device in near term and even in the future in spite of its high tritium trapping and chemical sputtering yield. Of course, the development of high Z PFM and free surface system are also important for fusion energy.
文摘There are more and more countries to ake an effort to the studies of vanadium alloy for fusion application. NIFS in Japan has recently developed an 80 kg heat V4Cr4Ti alloy (NIFS-heat 2) after the production of a 500 kg scale V4Cr4Ti in U. S. several years ago. Property evaluation of the alloy has beenput into an international collaboration program under the coordination of IEA (International Energy Agency). SWIP has joined the collabration on the hydrogen embrittlement resistance evaluation of the alloyt.
文摘It is well known that vanadium alloy will face to strong neutron irradiation and hydrogen environments as a structural material in a fusion reactor. Some researches have reported that vanadium alloy took strongly hardening after an exposure to hydrogen environment and irradiation by neutron at a temperature lower than 400℃. The ductility of the alloy was lost largely, even entirely brittle fracture occurred sometimes in tension loading of the alloy. Therefore, it's to get the knowledge of the hardening mechanism and the fracture mechanical for the purpose to improve the performances of the alloy under the circumstances.
文摘Recent West Nile virus epidemics in USA drawworldwide concerns. Here the basic biological and epidemi-ological features of the virus are analyzed along with thespecial immunity of humans and animals, the immigration ofbirds and the natural environments in China. The risk ofsevere hazards to China caused by West Nile virus is assessednot high thereafter.
