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离子辐照对碳化硅纳米压痕断裂与变形的影响

Effect of Ion Irradiation on Nanoindentation Fracture and Deformation in Silicon Carbide.

作者信息

Leide Alexander J, Todd Richard I, Armstrong David E J

机构信息

Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH UK.

出版信息

JOM (1989). 2021;73(6):1617-1628. doi: 10.1007/s11837-021-04636-8. Epub 2021 May 7.

DOI:10.1007/s11837-021-04636-8
PMID:34720550
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8549939/
Abstract

UNLABELLED

Silicon carbide is desirable for many nuclear applications, making it necessary to understand how it deforms after irradiation. Ion implantation combined with nanoindentation is commonly used to measure radiation-induced changes to mechanical properties; hardness and modulus can be calculated from load-displacement curves, and fracture toughness can be estimated from surface crack lengths. Further insight into indentation deformation and fracture is required to understand the observed changes to mechanical properties caused by irradiation. This paper investigates indentation deformation using high-resolution electron backscatter diffraction (HR-EBSD) and Raman spectroscopy. Significant differences exist after irradiation: fracture is suppressed by swelling-induced compressive residual stresses, and the plastically deformed region extends further from the indentation. During focused ion beam cross-sectioning, indentation cracks grow, and residual stresses are modified. The results clarify the mechanisms responsible for the modification of apparent hardness and apparent indentation toughness values caused by the compressive residual stresses in ion-implanted specimens.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s11837-021-04636-8.

摘要

未标注

碳化硅在许多核应用中很理想，因此有必要了解其在辐照后的变形情况。离子注入结合纳米压痕常用于测量辐射诱导的力学性能变化；硬度和模量可从载荷 - 位移曲线计算得出，断裂韧性可根据表面裂纹长度估算。为了解辐照引起的力学性能变化，需要对压痕变形和断裂有更深入的认识。本文使用高分辨率电子背散射衍射（HR - EBSD）和拉曼光谱研究压痕变形。辐照后存在显著差异：肿胀引起的压缩残余应力抑制了断裂，塑性变形区域从压痕处延伸得更远。在聚焦离子束横截面分析过程中，压痕裂纹会扩展，残余应力也会改变。这些结果阐明了离子注入试样中由压缩残余应力导致表观硬度和表观压痕韧性值变化的机制。

补充信息

在线版本包含可在10.1007/s11837 - 021 - 04636 - 8获取的补充材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/e3cdf00c1e2a/11837_2021_4636_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/c188b2ea0926/11837_2021_4636_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/c3a597e73765/11837_2021_4636_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/640e8ce182da/11837_2021_4636_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/6e523ea95d33/11837_2021_4636_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/037722944427/11837_2021_4636_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/e1d376cd9513/11837_2021_4636_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/ccb49c2bb650/11837_2021_4636_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/e3cdf00c1e2a/11837_2021_4636_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/c188b2ea0926/11837_2021_4636_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/c3a597e73765/11837_2021_4636_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/640e8ce182da/11837_2021_4636_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/6e523ea95d33/11837_2021_4636_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/037722944427/11837_2021_4636_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/e1d376cd9513/11837_2021_4636_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/ccb49c2bb650/11837_2021_4636_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/63db/8549939/e3cdf00c1e2a/11837_2021_4636_Fig8_HTML.jpg

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本文引用的文献

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