In the presence of PVPK30,Cu 1-x Ag x I nanoparticles were prepared by ion exchange reaction.The product was char acterized by FT-IR,XRD,TEM,EDS and SPS,respectively.It was found that the value of x is ap-proximately...In the presence of PVPK30,Cu 1-x Ag x I nanoparticles were prepared by ion exchange reaction.The product was char acterized by FT-IR,XRD,TEM,EDS and SPS,respectively.It was found that the value of x is ap-proximately0.5～0.6and the average diameter of the nanopa rticles is10～20nm.The product shows surface photovoltage property of semic onductor and the existence of Cu + greatly enhances the separation efficiency of photoinduced electron-hole pa irs.Meanwhile,SPS of Cu 1-x Ag x I nanoparticles with different X(Ag/I)value had been investigated.The re sults show that when X is0.5～0.576,the SPS intensity of Cu 1-x Ag x I nanoparticles is highest.展开更多
The effect of the quenching rate after solution treatment on the residual stress and precipitation behavior of a high strength Mg-5 Zn-3.5 Sn-1 Mn-0.5 Ca-0.5 Cu plate is studied.The simulation results show decreasing ...The effect of the quenching rate after solution treatment on the residual stress and precipitation behavior of a high strength Mg-5 Zn-3.5 Sn-1 Mn-0.5 Ca-0.5 Cu plate is studied.The simulation results show decreasing temperature gradient in the plate with decreasing quenching rate,which leads to weakened inhomogeneous plastic deformation and decreased residual stress.No dynamic precipitation on the grain boundary happens after either cold water cooling or air cooling,however,air cooling leads to dynamic precipitation of Mg-Zn phase on Mn particles around which a low-density precipitate zone develops after aging treatment.Moreover,the fine and densely distributed Mg-Zn precipitates observed after aging treatment of the cold water cooled alloy are replaced by coarse precipitates with low density for the air cooled alloy.Both the low-density precipitate zone near Mn particles and the coarsening of precipitates are the source of the decrease in hardness and tensile properties of the air cooled alloy.The residual stress drops faster than the hardness with decreasing quenching rate,which makes it possible to lower the residual stress without sacrificing too much age-hardening ability of the alloy.展开更多
文摘In the presence of PVPK30,Cu 1-x Ag x I nanoparticles were prepared by ion exchange reaction.The product was char acterized by FT-IR,XRD,TEM,EDS and SPS,respectively.It was found that the value of x is ap-proximately0.5～0.6and the average diameter of the nanopa rticles is10～20nm.The product shows surface photovoltage property of semic onductor and the existence of Cu + greatly enhances the separation efficiency of photoinduced electron-hole pa irs.Meanwhile,SPS of Cu 1-x Ag x I nanoparticles with different X(Ag/I)value had been investigated.The re sults show that when X is0.5～0.576,the SPS intensity of Cu 1-x Ag x I nanoparticles is highest.
基金supported by the National Key Research and Development Program of China[2016YFB0301105]the National Key Research and Development Plan[2017YFB0103904]
文摘The effect of the quenching rate after solution treatment on the residual stress and precipitation behavior of a high strength Mg-5 Zn-3.5 Sn-1 Mn-0.5 Ca-0.5 Cu plate is studied.The simulation results show decreasing temperature gradient in the plate with decreasing quenching rate,which leads to weakened inhomogeneous plastic deformation and decreased residual stress.No dynamic precipitation on the grain boundary happens after either cold water cooling or air cooling,however,air cooling leads to dynamic precipitation of Mg-Zn phase on Mn particles around which a low-density precipitate zone develops after aging treatment.Moreover,the fine and densely distributed Mg-Zn precipitates observed after aging treatment of the cold water cooled alloy are replaced by coarse precipitates with low density for the air cooled alloy.Both the low-density precipitate zone near Mn particles and the coarsening of precipitates are the source of the decrease in hardness and tensile properties of the air cooled alloy.The residual stress drops faster than the hardness with decreasing quenching rate,which makes it possible to lower the residual stress without sacrificing too much age-hardening ability of the alloy.
基金National Natural Science Foundation of China(61361008)National Key Basic Research Development Program of China("973" Program)(2010CB635112)Graduate Innovation Special Fund of Jiangxi Province(YC2016-B007)
