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2D Raman mapping and thermal residual stresses in SiC grains of ZrB2-SiC ceramic composites

机译：ZrB2-SiC陶瓷复合材料SiC晶粒的二维拉曼映射和热残余应力

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摘要

Thermal residual stresses of ZrB2-17 vol% SiC, ZrB2-32 vol% SiC, and ZrB2-45 vol% SiC ceramics were estimated using the piezospectroscopy. High spatial resolution (similar to 0.7 mu m) 2D Raman mapping was used to determine the average peak position of SiC in all three ZrB2-SiC composites in addition to the peak position in pure SiC. A novel filtering technique was used to refine the relevant PLO SiC peak of interest, which included a combination of filtering procedures based on peak intensity, Full Width at Half Maximum, and its position. After data filtering; the thermal residual stresses in ZrB2-SiC composites were estimated using PLO average peak positions using piezospectroscopic coefficients available in the literature. The obtained results were also compared with theoretical calculations models developed in the literature. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
机译：使用压电光谱法估算了ZrB2-17体积％SiC，ZrB2-32体积％SiC和ZrB2-45体积％SiC陶瓷的热残余应力。除了纯SiC中的峰值位置，还使用了高空间分辨率（约0.7微米）的二维拉曼映射来确定所有三种ZrB2-SiC复合材料中SiC的平均峰值位置。一种新颖的滤波技术被用于优化相关的PLO SiC峰，其中包括基于峰强度，半峰全宽及其位置的滤波程序的组合。经过数据过滤; ZrB2-SiC复合材料中的热残余应力是使用PLO平均峰位置和文献中可用的压电光谱系数估算的。还将获得的结果与文献中开发的理论计算模型进行比较。 （C）2015 Elsevier Ltd和Techna Group S.r.l.版权所有。

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