Determination of the elastic moduli of a machinable ceramic over the range from room temperature to 800°C
Determination of the elastic moduli of a machinable ceramic over the range from room temperature to 800°C
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室温至 800°C 范围内可加工陶瓷弹性模量的测定
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
H. Imai
中科院分区：
文献类型：
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作者：
H. Nakano;S. Nagai;H. Imai
利用脉冲回波重叠技术测量了一种可加工陶瓷材料的超声声速。可加工陶瓷由硼铝硅酸盐玻璃基质中的5至10 μm云母微晶块组成。弹性模量是从室温到800°C温度范围内的声速推导出来的。它们的温度变化可以用四次多项式很好地描述。虽然模量随温度升高而降低，但在约450°C处出现平台区。这种反常的行为是通过应用简单的“混合物规则”的组成材料，云母微晶，和玻璃基质解释。
The ultrasonic velocities of a machinable ceramic were measured using the pulse echo overlap technique. The machinable ceramic consists of 5- to 10-μm crystallite blocks of mica in a boroaluminosilicate glass matrix. The elastic moduli are deduced from the sound velocities over the temperature range from room temperature to 800°C. Their temperature change is well described by a fourth-degree polynomial. Although the moduli decrease with increasing temperature, a plateau region appears at about 450°C. This anomalous behavior is explained by applying the simple “rule of mixtures” to constituent materials, the mica crystallites, and the glass matrix.