SiC foam ceramic reinforced aluminum matrix composites(SFCAMCs)were prepared by squeeze casting aluminum alloy(Al-23Si)into the SiC foam ceramic with different pore sizes,and the corrosion behavior of the SFCAMCs was ...SiC foam ceramic reinforced aluminum matrix composites(SFCAMCs)were prepared by squeeze casting aluminum alloy(Al-23Si)into the SiC foam ceramic with different pore sizes,and the corrosion behavior of the SFCAMCs was studied in NaCl solutions.Static immersion corrosion tests were conducted at 20°C,50°C and 80°C,respectively.Corrosion morphology and products were analyzed by scanning electron microscope,energy dispersive system and X-ray diffraction.It was found that the corrosion rate of SFCAMCs increases as the temperature rising,and the bigger pore size of SiC foam ceramic reinforcement,the better corrosion resistance of SFCAMCs.展开更多
Compared with conventional materials,the active cooling ceramic matrix composite used in ramjet or scramjet makes their structures lighter in mass and better in performance.In this paper,an active and a passive coolin...Compared with conventional materials,the active cooling ceramic matrix composite used in ramjet or scramjet makes their structures lighter in mass and better in performance.In this paper,an active and a passive cooling refractory composite specimens are designed and tested with an experimental facility composed of multilayer smale scale cooling penel which consists of a water cooling system and a ceramic matrix composite specimen,and a gas generator used for providing lower and higher transfer rate gases to simulate the temperatures in combustion chamber of ramjst.The active cooling specimen can continuously suffer high surface temperature of 2 000 K for 30 s and that of 3 000 K for 9.3 s,respectively.The experiment results show that the active cooling composite structure is available for high-temperature condition in ramjet.展开更多
基金Project(00008713)supported by the Program of the Science and Technology Creative Team of Universities in Jiangxi,ChinaProject(2013-KLP-04)supported by the Open Foundation of Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials,China
文摘SiC foam ceramic reinforced aluminum matrix composites(SFCAMCs)were prepared by squeeze casting aluminum alloy(Al-23Si)into the SiC foam ceramic with different pore sizes,and the corrosion behavior of the SFCAMCs was studied in NaCl solutions.Static immersion corrosion tests were conducted at 20°C,50°C and 80°C,respectively.Corrosion morphology and products were analyzed by scanning electron microscope,energy dispersive system and X-ray diffraction.It was found that the corrosion rate of SFCAMCs increases as the temperature rising,and the bigger pore size of SiC foam ceramic reinforcement,the better corrosion resistance of SFCAMCs.
文摘Compared with conventional materials,the active cooling ceramic matrix composite used in ramjet or scramjet makes their structures lighter in mass and better in performance.In this paper,an active and a passive cooling refractory composite specimens are designed and tested with an experimental facility composed of multilayer smale scale cooling penel which consists of a water cooling system and a ceramic matrix composite specimen,and a gas generator used for providing lower and higher transfer rate gases to simulate the temperatures in combustion chamber of ramjst.The active cooling specimen can continuously suffer high surface temperature of 2 000 K for 30 s and that of 3 000 K for 9.3 s,respectively.The experiment results show that the active cooling composite structure is available for high-temperature condition in ramjet.
