Fused magnesium aluminate spinel carbon materials were prepared using fused magnesium aluminate spinel and flake graphite as the main raw materials and phenolic resin as the binder.The effects of the Al-Si alloy addit...Fused magnesium aluminate spinel carbon materials were prepared using fused magnesium aluminate spinel and flake graphite as the main raw materials and phenolic resin as the binder.The effects of the Al-Si alloy addition(0,2%,4%,6%,8%and 10%,by mass)on the properties of fused magnesium aluminate spinel carbon materials were studied.The results show that fiber materials are generated in the samples with Al-Si alloy addition,which can significantly improve the cold and hot modulus of rupture,the cold elastic modulus,and the thermal shock resistance of the samples.When the addition of Al-Si alloy is 6%-8%,the comprehensive performance of the sample is the optimum.展开更多
The MgB2 formation was analyzed physically and chemically and the MgB2/Fe wires were fabricated by powder in tube (PIT) technology. The microstructure of MgB2 in wires was studied by the scanning electrical microscope...The MgB2 formation was analyzed physically and chemically and the MgB2/Fe wires were fabricated by powder in tube (PIT) technology. The microstructure of MgB2 in wires was studied by the scanning electrical microscope (SEM), which shows a good connection of grains and the size of MgB2 grain is 13 mm. The results of Jc measured by the standard four probes method show that Jc value reaches 6.1?04 A/cm2 at 20 K in self field.展开更多
基金National Key Research and Development Program of China(2021YFB3701404)National Natural Science Foundation of China(51932008)for the support of the work
文摘Fused magnesium aluminate spinel carbon materials were prepared using fused magnesium aluminate spinel and flake graphite as the main raw materials and phenolic resin as the binder.The effects of the Al-Si alloy addition(0,2%,4%,6%,8%and 10%,by mass)on the properties of fused magnesium aluminate spinel carbon materials were studied.The results show that fiber materials are generated in the samples with Al-Si alloy addition,which can significantly improve the cold and hot modulus of rupture,the cold elastic modulus,and the thermal shock resistance of the samples.When the addition of Al-Si alloy is 6%-8%,the comprehensive performance of the sample is the optimum.
基金supported by the National Natural Science Foundation of China(Grant No.50172040)the National High Technology Development Program of China(Grant No.2002-AA306251)
文摘The MgB2 formation was analyzed physically and chemically and the MgB2/Fe wires were fabricated by powder in tube (PIT) technology. The microstructure of MgB2 in wires was studied by the scanning electrical microscope (SEM), which shows a good connection of grains and the size of MgB2 grain is 13 mm. The results of Jc measured by the standard four probes method show that Jc value reaches 6.1?04 A/cm2 at 20 K in self field.