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Anisotropy Measurement of Pyrolytic Carbon Layers of Coated Particles

机译：包覆颗粒热解碳层的各向异性测量

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Equipment at the National Research Center Kurchatov Institute intended for the anisotropy determination of pyrolytic carbon layers in coated particles (CPs) of the GT-MGR reactor is tested and calibrated. The dependence of the anisotropy coefficient on the size of the measurement region is investigated. The results of measuring the optical anisotropy factor (OPTAF) for an aluminum mirror, rutile crystal, and available CP samples with the known characteristics measured previously using ORNL equipment (United States) are presented. In addition, measurements of CP samples prepared at VNIINM are performed. A strong dependence of the data on the preparation quality of metallographic sections is found. Our investigations allow us to make the conclusion on the working capacity of the existing equipment for measuring the anisotropy of pyrolytic carbon CP coatings using the equipment at the Kurchatov Institute with the relative error of about 1%. It is shown that the elimination of the errors caused by the stochastic fluctuations in a measuring path by mathematical processing of the signal allows us to decrease the relative error of OPTAF measurements to similar to 0.3%.
机译：测试并校准了库尔恰托夫国家研究中心国家研究中心用于各向异性测定GT-MGR反应器涂层颗粒（CP）中热解碳层的设备。研究了各向异性系数对测量区域大小的依赖性。给出了铝镜，金红石晶体和可用CP样品的光学各向异性因子（OPTAF）的测量结果，这些样品以前已使用ORNL设备（美国）进行了测量。此外，还对在VNIINM制备的CP样品进行了测量。发现数据对金相切片制备质量的强烈依赖性。我们的研究使我们能够得出结论，使用库尔恰托夫研究所的设备来测量现有热解碳CP涂层各向异性的设备的工作能力，其相对误差约为1％。结果表明，通过信号的数学处理消除了由测量路径中的随机波动引起的误差，这使我们可以将OPTAF测量的相对误差降低到大约0.3％。

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