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| 1 | 金属铬粉对镁铬耐火材料理化性能的影响显示文摘为了研究金属铬粉对镁铬耐火材料各理化性能的影响,以镁砂、铬铁矿、金属铬粉为原料,羧甲基纤维素钠为结合剂,经压制并在1 600℃下保温3 h烧制成镁铬耐火试样,系统研究金属铬粉的添加量(加入量分别为0%、0.3%、0.5%、1%、1.5%)对镁铬耐火材料气孔率、抗折强度、耐压强度和抗热震性的影响.结果表明,添加0.3%的金属铬粉可明显降低试样的气孔率,使试样致密烧结,强度也显著提高,但对抗热震性影响不明显;随着金属铬粉添加量的增多,各理化性能逐渐恶化,添加1.5%金属铬粉的试样强度明显降低,气孔率升高且气孔孔径明显变大,这是因为金属铬粉发生氧化反应产生严重的膨胀.为了提高镁铬耐火材料的理化性能,金属铬粉的添加量应在0.3%左右. | 石辛未 王福明 熊曙波 | 2016 | 有色金属科学与工程2016，7，3： | 2 |
| 2 | Advanced Measures to Characterize Mechanical Properties of Refractories显示文摘The thermomechanical modelling method is becoming an important tool nowadays for the refractory researchers,suppliers and end-users. On one hand,applications focus on the post-mortem thermomechanical analysis to interpret the occurred failure phenomena of refractories in service. On the other hand,a priori investigation is very helpful for the design of refractory lining concepts before putting them into effect; as a result it will minimize the probability of refractory lining premature failure and save costs for the refractory suppliers as well as for the end-users. For both investigation routines,suitable material constitutive models and testing approaches are of relevance. Existing material constitutive models often used for refractories are the fictitious crack model acting for tensile failure,the Mohr-Coulomb or Drucker-Prager model describing shear failure,and the Norton-Bailey model representing creep. To characterize the tensile and shear failure of refractories at room temperature and elevated temperatures,a wedge splitting test and a modified shear test can be applied,respectively. The creep behavior and corresponding creep parameters of refractories can be determined with an appropriate creep testing device at elevated loads. The proper application of material constitutive models and testing approaches allows for improving the thermo-mechanical modelling and the optimization of the lining design. | Shengli JIN Harald HARMUTH Dietmar GRUBER Amina SIDI MAMMAR | 2018 | China's Refractories2018，27，1： | 0 |
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