FeCrAl fiber-reinforced hydroxyapatite（HA） biocomposites（FeCrAl（f）/HA） were fabricated by the hot pressing technique.The metallographic microscopy,X-ray diffractometry,scanning electron microscopy（SEM） and ene...FeCrAl fiber-reinforced hydroxyapatite（HA） biocomposites（FeCrAl（f）/HA） were fabricated by the hot pressing technique.The metallographic microscopy,X-ray diffractometry,scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS） were used to observe and analyze the microstructure and composition of FeCrAl（f）/HA composites,respectively.The mechanical properties of FeCrAl（f）/HA composites were measured by the three-point-bending test.The results show that the composite can be reinforced by FeCrAl fiber and enhanced gradually,and then declined with the increase of the content of FeCrAl fiber（0-11%,volume fraction） in the whole range of experiments.Both the HA matrix and FeCrAl fiber integrate very tightly and bit into each other very deeply and counter-diffusion takes place to some extent at two-phase interface.The optimum parameters of FeCrAl（f）/HA composite are diameter of 22 μm,length of 1-2 mm and of volume faction of about 7% for FeCrAl fibers.展开更多
目前我国机械采油井系统主要包括抽油机井系统和电泵井系统。抽油机井系统是油田普遍采用的采油装置,技术较为成熟。电泵井系统无论采用螺杆泵还是潜油电泵都需要用普通平口钢管悬挂电泵,电缆独立下井。该系统普遍存在管内结蜡、电缆磨...目前我国机械采油井系统主要包括抽油机井系统和电泵井系统。抽油机井系统是油田普遍采用的采油装置,技术较为成熟。电泵井系统无论采用螺杆泵还是潜油电泵都需要用普通平口钢管悬挂电泵,电缆独立下井。该系统普遍存在管内结蜡、电缆磨损等缺点。面对上述技术难题,公司开发了纤维增强敷缆复合采油管,将井下电泵所需线缆敷设在管材结构层中,用管体结构对线缆进行保护,并且管材为多层结构,内层采用PE、P V D F等材料制造,内壁光滑,彻底根除了电泵井系统存在的管内结蜡、电缆磨损等技术难题,解决上述问题的关键在于纤维增强敷缆复合采油管的内衬层的挤出工艺研究以及增强层敷缆工艺的研究。本文对重要工艺环节的控制进行介绍。展开更多
The investigating of the hot press process parameters on the flexural properties of LVL （Laminated Veneer Lumber） reinforced composites derived from rubber wood veneer reinforced with fiber glass woven and epoxy adh...The investigating of the hot press process parameters on the flexural properties of LVL （Laminated Veneer Lumber） reinforced composites derived from rubber wood veneer reinforced with fiber glass woven and epoxy adhesive were performed via the DOE （design of experimental） approach. It was discovered that pressure was the most significantly and negatively effect on the product properties. Enhancing in the mechanical properties was related to decrease the processing pressure. Beside, press time was also significantly and positively effect. Although time was not clearly reflect from the mechanical results, but it was detected from the ANOVA （analysis of variance）results. The mechanical properties were increased with increasing compression time. From the results, the optimal condition to maximize mechanical properties was assumed at low pressure, 15 bars, low temperature, 70℃, and long time, 60 mins. The durability testing including screw nail withdrawal strength, water absorption, and termite resistance of LVL reinforced composite were also studied. The results are shown that the LVL wood has superior properties when compare with solid woods. It was found the withdrawal strength of LVL reinforce composite was higher than the solid woods. As expected that solid woods, except eucalyptus, had low water absorption resistance as it more hygroscopic corresponded to LVL reinforced wood. Also solid woods, except teal（, had low resistance to termite attack. Therefore, LVL reinforced was the best candidate by mean of durability properties compared to solid wood.展开更多
基金Project(50774096) supported by the National Natural Science Foundation of ChinaProject(2011QNZT046) supported by the Fundamental Research Funds of the Central South University,ChinaProject supported by the Postdoctoral Science Foundation of Central South University,China
文摘FeCrAl fiber-reinforced hydroxyapatite（HA） biocomposites（FeCrAl（f）/HA） were fabricated by the hot pressing technique.The metallographic microscopy,X-ray diffractometry,scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS） were used to observe and analyze the microstructure and composition of FeCrAl（f）/HA composites,respectively.The mechanical properties of FeCrAl（f）/HA composites were measured by the three-point-bending test.The results show that the composite can be reinforced by FeCrAl fiber and enhanced gradually,and then declined with the increase of the content of FeCrAl fiber（0-11%,volume fraction） in the whole range of experiments.Both the HA matrix and FeCrAl fiber integrate very tightly and bit into each other very deeply and counter-diffusion takes place to some extent at two-phase interface.The optimum parameters of FeCrAl（f）/HA composite are diameter of 22 μm,length of 1-2 mm and of volume faction of about 7% for FeCrAl fibers.
文摘目前我国机械采油井系统主要包括抽油机井系统和电泵井系统。抽油机井系统是油田普遍采用的采油装置,技术较为成熟。电泵井系统无论采用螺杆泵还是潜油电泵都需要用普通平口钢管悬挂电泵,电缆独立下井。该系统普遍存在管内结蜡、电缆磨损等缺点。面对上述技术难题,公司开发了纤维增强敷缆复合采油管,将井下电泵所需线缆敷设在管材结构层中,用管体结构对线缆进行保护,并且管材为多层结构,内层采用PE、P V D F等材料制造,内壁光滑,彻底根除了电泵井系统存在的管内结蜡、电缆磨损等技术难题,解决上述问题的关键在于纤维增强敷缆复合采油管的内衬层的挤出工艺研究以及增强层敷缆工艺的研究。本文对重要工艺环节的控制进行介绍。
文摘The investigating of the hot press process parameters on the flexural properties of LVL （Laminated Veneer Lumber） reinforced composites derived from rubber wood veneer reinforced with fiber glass woven and epoxy adhesive were performed via the DOE （design of experimental） approach. It was discovered that pressure was the most significantly and negatively effect on the product properties. Enhancing in the mechanical properties was related to decrease the processing pressure. Beside, press time was also significantly and positively effect. Although time was not clearly reflect from the mechanical results, but it was detected from the ANOVA （analysis of variance）results. The mechanical properties were increased with increasing compression time. From the results, the optimal condition to maximize mechanical properties was assumed at low pressure, 15 bars, low temperature, 70℃, and long time, 60 mins. The durability testing including screw nail withdrawal strength, water absorption, and termite resistance of LVL reinforced composite were also studied. The results are shown that the LVL wood has superior properties when compare with solid woods. It was found the withdrawal strength of LVL reinforce composite was higher than the solid woods. As expected that solid woods, except eucalyptus, had low water absorption resistance as it more hygroscopic corresponded to LVL reinforced wood. Also solid woods, except teal（, had low resistance to termite attack. Therefore, LVL reinforced was the best candidate by mean of durability properties compared to solid wood.
