Micron-scale measurements of the coefficient of thermal expansion by time-domain probe beam deflection
Micron-scale measurements of the coefficient of thermal expansion by time-domain probe beam deflection
复制标题
通过时域探测光束偏转进行微米级热膨胀系数测量
DOI：
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Ji
中科院分区：
文献类型：
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作者：
Xuan Zheng;D. Cahill;R. Weaver;Ji
我们描述了一种泵浦探测光学技术，时域探测光束偏转，使测量的热膨胀系数（CTE）与微米级的空间分辨率。我们的光束偏转的定量模型包括从沉积在衬底上的薄膜的热膨胀，衬底的热膨胀，衬底的弹性变形，加热的样品表面上方的空气，和样品的表面处的横向温度梯度的贡献。该技术用于高通量CTE测量的有用性通过两个实验证明：我们能够直接从简单的Fe-Ni扩散偶中找到Invar合金成分，并且我们发现在人牙齿的牙本质-釉质交界处的牙本质的约100μm区域中存在异常CTE增加。这种CTE异常将难以使用其他技术发现。
We describe a pump-probe optical technique, time-domain probe-beam deflection, that enables measurements of the coefficient of thermal expansion (CTE) with micron-scale spatial resolution. Our quantitative model for the beam deflection includes contributions from thermal expansion of thin films deposited on a substrate, thermal expansion of the substrate, elastic deformation of the substrate, heating of air above the surface of the sample, and the lateral temperature gradient at the surface of the sample. The usefulness of this technique for high-throughput CTE measurement is demonstrated by two experiments: we are able to find the Invar alloy composition directly from a simple Fe–Ni diffusion couple and we find abnormal CTE increase in an ≈100μm region of dentin adjacent to the dentin-enamel junction of a human tooth. Such a CTE abnormality would be difficult to find using other techniques.
影响因子：
2.9
作者：
FARAH, JW;CRAIG, RG;MEROUEH, KA
通讯作者：
MEROUEH, KA
DOI：
10.1002/1097-4636(200101)54:1
发表时间：
2001-01-01
期刊：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
影响因子：
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作者：
Marshall, GW;Balooch, M;Marshall, SJ
通讯作者：
Marshall, SJ