Recent developments in the laser spallation technique to measure the interface strength and its relationship to interface toughness with applications to metal/ceramic, ceramic/ceramic and ceramic/polymer interfaces
Recent developments in the laser spallation technique to measure the interface strength and its relationship to interface toughness with applications to metal/ceramic, ceramic/ceramic and ceramic/polymer interfaces
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DOI：
10.1163/156856194x00447
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发表时间：
1994
影响因子：
2.3
通讯作者：
V. Gupta;Jun Yuan;A. Pronin
中科院分区：
文献类型：
--
作者：
V. Gupta;Jun Yuan;A. Pronin
本文综述了激光溅射技术在测量平面薄膜界面抗拉强度方面的最新进展。在这种技术中，激光产生的压缩应力脉冲在基板上，从涂层的自由表面反射，拉界面张力，并导致其故障，如果拉伸振幅足够高。早些时候，通过计算机模拟过程确定了实现涂层去除的临界应力幅度。最近，该技术进行了修改，使界面应力可以直接通过使用多普勒干涉仪记录涂层或基板的自由表面速度来确定。通过弹性波力学模拟，记录的表面速度与界面应力有关。综述了近年来金属/陶瓷、陶瓷/陶瓷和陶瓷/聚合物体系的界面强度研究进展。此外，两个发展，第一个新的干涉仪记录速度从…
This paper summarizes recent developments in the laser spallation technique for measuring the tensile strength of planar thin film interfaces. In this technique, a laser-produced compressive stress pulse in the substrate, reflecting from the coating's free surface, pulls the interface in tension and leads to its failure if the tensile amplitude is high enough. Earlier, the critical stress amplitude that accomplishes the removal of the coating was determined through a computer simulation of the process. Recently, the technique was modified so that the interface stress can be determined directly by recording the coating or substrate free-surface velocities using a Doppler interferometer. The recorded surface velocity is related to the interface stress via an elastic wave mechanics simulation. Interface strengths of several metal/ceramic, ceramic/ceramic and ceramic/polymer systems are summarized from our recent efforts. In addition, two developments, the first a novel interferometer to record velocities fro...