GRADIENT OF THE MECHANICAL MODULUS IN GLASS–EPOXY–METAL JOINTS AS MEASURED BY BRILLOUIN MICROSCOPY
GRADIENT OF THE MECHANICAL MODULUS IN GLASS–EPOXY–METAL JOINTS AS MEASURED BY BRILLOUIN MICROSCOPY
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布里渊显微镜测量的玻璃-环氧树脂-金属接头的机械模量梯度
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发表时间：
2004
期刊：
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通讯作者：
P. Alnot
中科院分区：
文献类型：
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作者：
J. Krüger;W. Possart;R. Bactavachalou;U. Müller;T. Britz;R. Sanctuary;P. Alnot
新开发的布里渊显微镜首次用于原位测量玻璃环氧树脂金属接头内部纵向弹性刚度系数在ghz范围内与基材距离的函数关系。对具有局部力学性能变化的界面相进行了定量表征。这些界面具有意想不到的几十到几百微米的宽度。在界面内，纵向刚度系数的空间变化取决于基材的类型、环氧树脂的固化条件以及内应力的分布。获得的空间力学剖面为间期的形态驱动力学提供了有价值的见解，但需要额外的信息来充分了解其物理和化学起源。实验结果证明了布里渊显微镜的灵敏度；弹性刚度系数的检测精度在子百分比范围内。空间分辨率大于10µm。
The newly developed Brillouin microscopy is used for the first time to measure in situ the longitudinal elastic stiffness coefficient in the GHz-range inside of glass–epoxy–metal joints as a function of distance from the substrates. Interphases with a local variation of mechanical properties are quantitatively characterized. These interphases possess unexpected widths of tens to hundreds of microns. Inside the interphases, the spatial variation of the longitudinal stiffness coefficient depends on the type of substrate, on the curing conditions for the epoxy and probably on the distribution of internal stresses. The obtained spatial mechanical profiles provide valuable insight into the morphology-driven mechanics of the interphase, but additional information is needed for a full understanding of their physical and chemical origin. The presented results prove the sensitivity of the Brillouin microscopy; the elastic stiffness coefficients are detected with an accuracy in the subpercentage range. The spatial resolution is better than 10 µm.