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Mechanical Properties of Magnesia and Magnesia-Chromite Refractory Materials

机译：镁质和镁铬铁质耐火材料的力学性能

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摘要

In this study, modulus of rupture, elastic modulus and fracture toughness values were investigated at elevated temperature for magnesia and magnesia-chromite content of chromite between 6% and 20%. Modulus of rupture and elastic modulus values were calculated by three point bending test at temperatures 400, 600, 800 and 1400 ℃. Modulus of rupture and Young's modulus values decreased when temperature and content of chromite increased. Modulus of rupture and Young's modulus values at room temperature were compared to the values at 400, 600, 800 and 1400 ℃. Young's modulus values decreased to about 40% and modulus of rupture values decreased to about 25% of the values at room temperature. The samples were notched as a/h = 0.3 by cutting tool of 0.2 mm thickness. Fracture toughness values were calculated at each temperature. Fracture toughness value at room temperature was compared to the values at 400, 600, 800 and 1400 ℃. It was seen that fracture toughness values had decreased by the increase at temperature
机译：在这项研究中，研究了在升高的温度下，氧化镁和铬铁矿中亚铬酸镁含量在6％和20％之间的断裂模量，弹性模量和断裂韧性值。通过在400、600、800和1400℃的温度下的三点弯曲试验计算断裂模量和弹性模量值。当温度和亚铬酸盐含量增加时，断裂模量和杨氏模量值降低。将室温下的断裂模量和杨氏模量值与400、600、800和1400℃下的值进行比较。在室温下，杨氏模量值降低到约40％，而断裂模量值降低到约25％。用0.2mm厚度的切割工具将样品切成a / h ＝ 0.3。在每个温度下计算断裂韧性值。将室温下的断裂韧性值与400、600、800和1400℃下的值进行比较。可以看出，随着温度的升高，断裂韧性值降低了。

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