On the Use of the Transient Hot-Strip Method for Measuring the Thermal Conductivity of High-Conducting Thin Bars
On the Use of the Transient Hot-Strip Method for Measuring the Thermal Conductivity of High-Conducting Thin Bars
复制标题
DOI：
10.1007/s10765-006-0072-z
复制
发表时间：
2006-09
影响因子：
2.2
通讯作者：
M. Gustavsson;H. Wang;R. Trejo;E. Lara‐Curzio;R. Dinwiddie;S. Gustafsson
中科院分区：
文献类型：
--
作者：
M. Gustavsson;H. Wang;R. Trejo;E. Lara‐Curzio;R. Dinwiddie;S. Gustafsson
薄型、高导电性陶瓷棒通常用于机械拉伸测试，其导热系数是使用短瞬时热条技术的变体来测量的。与类似的接触瞬变方法一样，传感器和样品之间的接触热阻的影响可以准确地记录下来，并从分析中过滤掉-这是一种特殊的优势，可以对样品材料的整体特性进行灵敏的测量。目前的概念要求传感器是方形的，一侧与要研究的杆具有相同的宽度。只要满足这一要求，就可以随意选择细棒的特定尺寸。本文介绍了一种应用本技术来研究加固碳-碳(RCC)棒材在热循环作用下的结构变化或退化的应用。同时，进行了拉伸试验和质量损失监测。结果表明，该方法可以作为一种无损质量控制手段来监测碾压混凝土面板的局部结构变化。
The thermal conductivity of thin, high-conducting ceramic bars—commonly used in mechanical tensile testing—is measured using a variant of the short transient hot-strip technique. As with similar contact transient methods, the influence from the thermal contact resistance between the sensor and the sample is accurately recorded and filtered out from the analysis—a specific advantage that enables sensitive measurements of the bulk properties of the sample material. The present concept requires sensors that are square in shape with one side having the same width as the bar to be studied. As long as this requirement is fulfilled, the particular size of the thin bar can be selected at will. This paper presents an application where the present technique is applied to study structural changes or degradation in reinforced carbon–carbon (RCC) bars exposed to thermal cycling. Simultaneously, tensile testing and monitoring of mass loss are conducted. The results indicate that the present approach may be utilized as a non-destructive quality control instrument to monitor local structural changes in RCC panels.