Mechanical properties and surface characteristics of SiC fibers irradiated by swift heavy ions

SiC fibers were irradiated by 414.4-MeV 112 Sn 27.3+ ions to different fluences (5.0 × 10 12 , 6.0 × 10 13 , 1.6 × 10 14 , and 1.92 × 10 15 ions/cm 2 ). 112 Sn 27.3+ deposited its energy mainly via electron energy loss and passed through the SiC fiber. Then, the mechanical properties and surface cha...

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Bibliographic Details
Published in:Nuclear science and techniques 2022-09, Vol.33 (9), p.37-47, Article 113
Main Authors: Zhang, Li-Qing, Zhang, Chong-Hong, Hao, Chen-Chun, Hu, Guo-Dong, Feng, Zheng-Dong, Tang, Yong-Jian, Zhu, Wen-Kun, Li, Jian-Yang, Huang, Qing
Format: Article
Language:English
Subjects:
Beam Physics
Nuclear Energy
Particle Acceleration and Detection
Particle and Nuclear Physics
Physics
Physics and Astronomy
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Summary:SiC fibers were irradiated by 414.4-MeV 112 Sn 27.3+ ions to different fluences (5.0 × 10 12 , 6.0 × 10 13 , 1.6 × 10 14 , and 1.92 × 10 15 ions/cm 2 ). 112 Sn 27.3+ deposited its energy mainly via electron energy loss and passed through the SiC fiber. Then, the mechanical properties and surface characteristics of fibers were studied using a specific single filament tensile test and field emission scanning electron microscopy. Results revealed that the carbon concentration on the fiber surface increased while the silicon concentration decreased. Moreover, the addition of oxygen was found to correlate with an increase in ion fluence. Meanwhile, the fiber surface morphology of the least fluence (5.0 × 10 12 ions/cm 2 ) irradiated specimen displayed no obvious changes and its diameter was slightly reduced. With successive increases of ion fluence, large grains/bubbles on the fiber surface first appeared and then disappeared, and the diameter of fibers evidently increased. Moreover, at the highest fluence (1.92 × 10 15 Sn ions/cm 2 ) irradiated specimen, some fibers were brittle fractured. As a result, the mean tensile strength and the average elastic modulus of the fibers generally decreased with respect to the ion fluence. The degradation mechanisms of mechanical properties of SiC fibers under irradiation are discussed in detail.
ISSN:1001-8042
2210-3147
DOI:10.1007/s41365-022-01095-x