The semi-solid processed Mg2Si/A356 composites were fabricated using a sloping plate,and the phase and morphology evolution of the semi-solid Mg2Si/A356 slurry during the remelting process was investigated.Results ind...The semi-solid processed Mg2Si/A356 composites were fabricated using a sloping plate,and the phase and morphology evolution of the semi-solid Mg2Si/A356 slurry during the remelting process was investigated.Results indicate that compared to as-cast microstructure,the size of primaryα-Al phase and Mg2Si phase of semi-solid microstructure fabricated by using a sloping plate decreases and the morphology ofα-Al phase becomes fine and globular.With increasing the reheating temperature and prolonging the holding time,the primaryα-Al phase spheroidizes,the liquid fraction in semi-solid microstructure increases,and the Chinese script Mg2Si phase embedded in the primaryα-Al phase cannot be observed.The Chinese script Mg2Si phase is distributed in the secondaryα-Al phase and becomes smaller.The net-shaped eutectic phase also becomes finer after reheating.The optimum remelting parameters suitable for thixoforming in this study are remelting at 580℃for 30 min.展开更多
BACKGROUND Subclavian artery stenosis refers to the stenosis in the lumen caused by the presence of plaque or thrombus in the subclavian artery.It is a common problem in endovascular interventions.In fact,conventional...BACKGROUND Subclavian artery stenosis refers to the stenosis in the lumen caused by the presence of plaque or thrombus in the subclavian artery.It is a common problem in endovascular interventions.In fact,conventional subclavian artery stenting via the femoral artery approach is effective and safe.Nevertheless,because femoral artery puncture is not easy to stop bleeding,it requires longer femoral artery compression or more expensive hemostatic materials,such as staplers.Patients need to be catheterized and bedridden for a longer time,which may lead to many complications,such as pseudoaneurysm.CASE SUMMARY Herein,we reported a new interventional therapy of subclavian artery.From March 1,2020 to August 31,2021,we operated on four patients with subclavian artery stenting via bilateral radial artery access.CONCLUSION After reviewing four cases of successful placement of clavicular artery stents via bilateral radial arteries,we concluded that bilateral radial artery approach is feasible.Clavicular artery stenting is safe,effective,and timesaving.It is an excellent alternative to the traditional femoral artery procedure,with few complications and high comfort degree.展开更多
基金the National Natural Science Foundation of China(Grant No.51865011)the Natural Science Foundation of Jiangxi Province,China(Grant No.20171BAB216031).
文摘The semi-solid processed Mg2Si/A356 composites were fabricated using a sloping plate,and the phase and morphology evolution of the semi-solid Mg2Si/A356 slurry during the remelting process was investigated.Results indicate that compared to as-cast microstructure,the size of primaryα-Al phase and Mg2Si phase of semi-solid microstructure fabricated by using a sloping plate decreases and the morphology ofα-Al phase becomes fine and globular.With increasing the reheating temperature and prolonging the holding time,the primaryα-Al phase spheroidizes,the liquid fraction in semi-solid microstructure increases,and the Chinese script Mg2Si phase embedded in the primaryα-Al phase cannot be observed.The Chinese script Mg2Si phase is distributed in the secondaryα-Al phase and becomes smaller.The net-shaped eutectic phase also becomes finer after reheating.The optimum remelting parameters suitable for thixoforming in this study are remelting at 580℃for 30 min.
文摘BACKGROUND Subclavian artery stenosis refers to the stenosis in the lumen caused by the presence of plaque or thrombus in the subclavian artery.It is a common problem in endovascular interventions.In fact,conventional subclavian artery stenting via the femoral artery approach is effective and safe.Nevertheless,because femoral artery puncture is not easy to stop bleeding,it requires longer femoral artery compression or more expensive hemostatic materials,such as staplers.Patients need to be catheterized and bedridden for a longer time,which may lead to many complications,such as pseudoaneurysm.CASE SUMMARY Herein,we reported a new interventional therapy of subclavian artery.From March 1,2020 to August 31,2021,we operated on four patients with subclavian artery stenting via bilateral radial artery access.CONCLUSION After reviewing four cases of successful placement of clavicular artery stents via bilateral radial arteries,we concluded that bilateral radial artery approach is feasible.Clavicular artery stenting is safe,effective,and timesaving.It is an excellent alternative to the traditional femoral artery procedure,with few complications and high comfort degree.
