Contemporary Chinese scholars proposed that China should construct modem Chinese aesthetic discourse system, therefore, we should attach great importance to China＇s own aesthetic development in 20th century and learn...Contemporary Chinese scholars proposed that China should construct modem Chinese aesthetic discourse system, therefore, we should attach great importance to China＇s own aesthetic development in 20th century and learn experience from it. There are four dimensions of learning. First, we should seek the origin of methods from Marxism. Second, the study should deeply rooted in Chinese traditional culture. Third, we should refer to ancient and modem Western aesthetic theories. Last but not the least, all the scholars should be encouraged to express their views freely and equally. The four dimensions, which plays an important role in constructing China＇s modem discourse of aesthetics, derived from the conclusion and experience of China＇s modem aesthetic development in 20th century.展开更多
W-Ag has applications in a wide range of cutting-edge fields,counting heat sinks and microwave absorbers for micro—electronic components,electric arc ends,and filaments for welding processes,electrical contacts,and d...W-Ag has applications in a wide range of cutting-edge fields,counting heat sinks and microwave absorbers for micro—electronic components,electric arc ends,and filaments for welding processes,electrical contacts,and durable electronic connections.Chemical methods provide a number of benefits,including improved purity,and controlled particle size.The present study focused on the fabrication of W-Ag nano composites using chemical synthesis.W-Ag nanocomposites with average size less than 50 nm were synthesized using Tungsten hexacarbonyl(W(CO)_(6),and silver acetate(CH_(3)-COOAg)as metal precursors in the present study.The W-Ag composites were sintered using conventional sintering.X-ray diffraction studies of as-prepared powders showed amorphous W-phase and FCC Ag,while sintered W-Ag composites exhibited crystalline BCC W and FCC Ag phase.The effect of sintering temperature on relative density and mechanical properties of W-Ag sintered compacts was investigated.Relative density in excess of 97.6%,98.2%and 98.8%was achieved for W-20.3 wt.%Ag,W-30.1 wt.%Ag and W-39.8 wt.%Ag composites on conventional sintering at 1000℃ for 1 h.Vickers hardness of 364±10 and 320±8 Hv and 279±6 were achieved for W-20.3 wt.%Ag,W-30.1 wt.%Ag and W-39.8 wt.%Ag composite compacts respectively.The hardness value of W-Ag composites decreased with an increase in Ag content.The combination of properties realized in this study renders the composites suitable for automotive and heat sink applications.展开更多
基金This essay is the initial result of ＂The study on the basic issues and critical pattern in contemporary aesthetics＂, a major project supported by National Social Science Foundation （Project Number：15ZDB023） ＂The study on the contemporary wester neural aesthetics＇ impact on the development of aesthetics in China＂, a normal project supported by National Social Science Foundation （Project Number：15BZW022） ＂Gorz ecological Marxist theory＇s implications for contemporary China＂, a project entrusted by Central Compilation ＆ Translation Bureau （Project Number： 15QWT26）.
文摘Contemporary Chinese scholars proposed that China should construct modem Chinese aesthetic discourse system, therefore, we should attach great importance to China＇s own aesthetic development in 20th century and learn experience from it. There are four dimensions of learning. First, we should seek the origin of methods from Marxism. Second, the study should deeply rooted in Chinese traditional culture. Third, we should refer to ancient and modem Western aesthetic theories. Last but not the least, all the scholars should be encouraged to express their views freely and equally. The four dimensions, which plays an important role in constructing China＇s modem discourse of aesthetics, derived from the conclusion and experience of China＇s modem aesthetic development in 20th century.
文摘W-Ag has applications in a wide range of cutting-edge fields,counting heat sinks and microwave absorbers for micro—electronic components,electric arc ends,and filaments for welding processes,electrical contacts,and durable electronic connections.Chemical methods provide a number of benefits,including improved purity,and controlled particle size.The present study focused on the fabrication of W-Ag nano composites using chemical synthesis.W-Ag nanocomposites with average size less than 50 nm were synthesized using Tungsten hexacarbonyl(W(CO)_(6),and silver acetate(CH_(3)-COOAg)as metal precursors in the present study.The W-Ag composites were sintered using conventional sintering.X-ray diffraction studies of as-prepared powders showed amorphous W-phase and FCC Ag,while sintered W-Ag composites exhibited crystalline BCC W and FCC Ag phase.The effect of sintering temperature on relative density and mechanical properties of W-Ag sintered compacts was investigated.Relative density in excess of 97.6%,98.2%and 98.8%was achieved for W-20.3 wt.%Ag,W-30.1 wt.%Ag and W-39.8 wt.%Ag composites on conventional sintering at 1000℃ for 1 h.Vickers hardness of 364±10 and 320±8 Hv and 279±6 were achieved for W-20.3 wt.%Ag,W-30.1 wt.%Ag and W-39.8 wt.%Ag composite compacts respectively.The hardness value of W-Ag composites decreased with an increase in Ag content.The combination of properties realized in this study renders the composites suitable for automotive and heat sink applications.
