Measurement of the density distributions in quenched polycarbonate specimens by a quantitative schlieren optical technique
Measurement of the density distributions in quenched polycarbonate specimens by a quantitative schlieren optical technique
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通过定量纹影光学技术测量淬火聚碳酸酯样品中的密度分布
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. G. D. Bruin
中科院分区：
文献类型：
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作者：
R. Wimberger;G. Prast;A. V. Kurstjens;J. G. D. Bruin
本文介绍了一种测定空间密度分布的新技术。密度是从用定量纹影光学技术测定的折射率梯度导出的。该技术的优点是高空间分辨率和灵敏度。可以在不切片样品的情况下测量间隙分布，从而快速获得更可靠的数据。淬火聚碳酸酯试样的结果表明，密度分布是由局部冷却速率变化和冷却应力分布之间的竞争。
A new technique for the determination of spatial density distribution is described. The density is derived from the refractive index gradient as determined with a quantitative Schlieren optical technique. The advantages of this technique are a high spatial resolution and sensitivity. Gapwise profiles can be measured without slicing the sample so that more reliable data are obtained quickly. Results obtained with quenched polycarbonate specimens show that the density distribution is determined by a competition between the local cooling rate variation and the cooling stress distribution.