采用2~5 mm厚的纯V与纯Cu组成复合过渡段,进行了TA2与304不锈钢的激光焊接试验,测试了接头的拉伸强度,利用金相显微镜、扫描电镜以及能谱仪对连接界面处元素扩散、接头断口形貌进行了分析。结果表明,采用加入2~5 mm V/Cu复合过渡段进行...采用2~5 mm厚的纯V与纯Cu组成复合过渡段,进行了TA2与304不锈钢的激光焊接试验,测试了接头的拉伸强度,利用金相显微镜、扫描电镜以及能谱仪对连接界面处元素扩散、接头断口形貌进行了分析。结果表明,采用加入2~5 mm V/Cu复合过渡段进行TA2和304不锈钢的激光焊接时,可以获得连接良好、无裂纹的焊接接头。中间过渡段越厚,接头抗拉强度越大,加入5 mm V/Cu复合过渡段时,接头平均抗拉强度最高达297 MPa,断裂发生在Cu过渡段内,属韧性断裂。展开更多
A Ag@CuFe_(2)O_(4)@TiO_(2) nanocomposite film with high performance of photogenerated cathodic protection was prepared by hydrothermal and photoreduction methods.The results showed that when the CuFe_(2)O_(4) hydrothe...A Ag@CuFe_(2)O_(4)@TiO_(2) nanocomposite film with high performance of photogenerated cathodic protection was prepared by hydrothermal and photoreduction methods.The results showed that when the CuFe_(2)O_(4) hydrothermal reaction time was 6 h and the AgNO_(3) concentration was 0.1 M,the Ag@CuFe_(2)O_(4)@TiO_(2) nanocomposite material performed the best cathodic protection capability for 304 stainless steel(304SS).In this case,the protective potential achieved-930 mV(versus SCE)associated with the photocurrent density of 475μA/cm^(2),which was 14.8 times that of pure TiO_(2) nanowires.In the dark,the nanocomposite provided cathodic protection of up to 485 mV for 304SS.Due to the heterogeneous junctions at the two interfaces among the three kinds of nanocomposite materials,the build-in electric field was fabricated,which promoted the separation efficiency of photogenerated electrons and holes and effectively improved the photochemical cathodic protection of 304SS.展开更多
文摘采用2~5 mm厚的纯V与纯Cu组成复合过渡段,进行了TA2与304不锈钢的激光焊接试验,测试了接头的拉伸强度,利用金相显微镜、扫描电镜以及能谱仪对连接界面处元素扩散、接头断口形貌进行了分析。结果表明,采用加入2~5 mm V/Cu复合过渡段进行TA2和304不锈钢的激光焊接时,可以获得连接良好、无裂纹的焊接接头。中间过渡段越厚,接头抗拉强度越大,加入5 mm V/Cu复合过渡段时,接头平均抗拉强度最高达297 MPa,断裂发生在Cu过渡段内,属韧性断裂。
基金financially supported by the National Natural Science Foundation of China(Nos.U1706225,42006046,2019GGX102014,2019YFC0312103)the Research Fund of Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao,No.HYFSKF201804)。
文摘A Ag@CuFe_(2)O_(4)@TiO_(2) nanocomposite film with high performance of photogenerated cathodic protection was prepared by hydrothermal and photoreduction methods.The results showed that when the CuFe_(2)O_(4) hydrothermal reaction time was 6 h and the AgNO_(3) concentration was 0.1 M,the Ag@CuFe_(2)O_(4)@TiO_(2) nanocomposite material performed the best cathodic protection capability for 304 stainless steel(304SS).In this case,the protective potential achieved-930 mV(versus SCE)associated with the photocurrent density of 475μA/cm^(2),which was 14.8 times that of pure TiO_(2) nanowires.In the dark,the nanocomposite provided cathodic protection of up to 485 mV for 304SS.Due to the heterogeneous junctions at the two interfaces among the three kinds of nanocomposite materials,the build-in electric field was fabricated,which promoted the separation efficiency of photogenerated electrons and holes and effectively improved the photochemical cathodic protection of 304SS.
