最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

The composite refractory crucible using the fused BaZrO3 and Y2O3 was fabricated after sintering at 1650℃ for 24h, then induction melting of TiAl alloy was carried out in the crucible. By using the X-ray diffraction, scanning electron microscope combined with the energy disperse spectroscopy, inductively coupled plasma atomic emission pectrometry and O/N analyzer, the phase composition and microstructure for the composite refractory are investigated as well as the interaction between the composite crucible and TiAl alloy melt. Results reveal that the composite crucible is consisted of Y doped BaZrO3 and Y2O3(ZrO2) phases, and the introduce of Y2O3 is help to the improvement of fused BaZrO3 refractory. Dissolution-erosion is the main responsible for the interaction between the refractory and TiAl alloy melt, however, the Al2O3 in the melt reacts with the BaO leading to the generation of reactant BaAl2O4, which attaches to the inner wall of the crucible. The oxygen concentration for the prepared TiAl alloy ingot is about 0.0986wt.%, which is consistent with the calculated value for the TiAl alloy. It is also met criteria for the industrial TiAl alloy ingot, which indicates that the BaZrO3/Y2O3 composite refractory is the candidate for induction melting of TiAl alloys.