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HIGH SCHOOL

Engineering

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Engineering

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Materials Engineering

Using Dilatometry to Measure Heating Effects

Description

Dilatometry measures how a material changes in size as temperature changes. It can track changes in length, area, shape, or volume. The method is used to calculate thermal expansion, which is the expansion of a substance when it is heated.

Thermal expansion matters when choosing materials for sys...

Transcript

当考虑在温度波动的系统中使用时,材料的热膨胀非常重要。膨胀法是一种用于测量材料在温度波动过程中的面积、形状、长度或体积变化的技术。从而能够计算热膨胀。在本视频中,我们将介绍膨胀仪,并演示如何在实验室中测量金属样品的热膨胀。

首先通过使用卡尺测量样品的初始长度来进行膨胀法。然后将样品放入炉中,在本实验中,连接到垂直推杆。吹扫气体流经炉内,以提供一致的条件并防止样品在加热过程中氧化。然后以指定速率将样品加热到预定温度。样品的热膨胀被传递到推杆,然后推杆被转移到位移传感器。大多数材料会随着温度的升高而膨胀,然后在冷却时收缩。由于棒也暴露在炉中的高温下,因此它也会经历热胀冷缩。因此,必须校正测量以说明这一点。

样品经历的热膨胀是通过将长度变化除以样品的初始长度来计算的。...

Tags

Linear Expansion CoefficientVolumetric Expansion CoefficientDislocation AnalysisFurnace HeatingNitrogen Purge GasDisplacement SensorCalibration RunSample Preparation