THERMOMECHANICAL BEHAVIOUR OF MAGNESIA-CARBON REFRACTORIES
THERMOMECHANICAL BEHAVIOUR OF MAGNESIA-CARBON REFRACTORIES
复制标题
镁碳耐火材料的热机械性能
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
D. Thémines
中科院分区：
文献类型：
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作者：
Y. Berthaud;N. Schmitt;J. Poirier;D. Thémines
在20-1500°C温度范围内，通过拉伸、压缩和三点弯曲试验，对沥青和树脂结合镁碳质耐火材料的热力学行为进行了实验研究。在室温下，这两种类型的材料表现出非线性，准脆性行为类似于混凝土。非线性归因于微塑性和降解过程，并且是时间依赖的。沥青粘合剂耐火材料的机械特性被认为是上级的树脂粘合剂材料。在低于500-600°C的温度下发生物理化学转变后，耐火材料的非线性行为主要由降解和塑性机制控制。在粘合剂分解过程中的不同温度下以及在1000°C以上的温度下观察到时间效应。所建立的数据为促进开发更准确的基于物理的热机械模型奠定了基础。
An experimental investigation of the thermomechanical behaviour of pitch and resin bonded magnesia-carbon refractory materials has been carried out within the temperature range 20-1500°C by tension, compression, and three point bend tests. At room temperature, both types of material exhibited a non-linear, quasi brittle behaviour similar to that of concrete. The non-linearity is ascribed to microplasticity and degradation processes and is time dependent. The mechanical characteristics of the pitch binder refractory were found to be superior to those of the resin binder material. After the physical-chemical transformations which occur below 500-600°C, the non-linear behaviour of the refractories is primarily governed by degradation and plasticity mechanisms. Time effects were observed at different temperatures during decomposition of the binder and at temperatures above 1000°C. The data established form a basis on which to facilitate the development of more accurate physically based thermomechanical models.