Microstructure-mechanical properties correlation in irradiated amorphous SiOC

作者：Su Qing; King Sean; Li Liyi; Wang Tianyao; Gigax Jonathan; Shao Lin; Lanford William A; Nastasi Michael

来源：Scripta Materialia, 2018, 146: 316-320.

DOI：10.1016/j.scriptarnat.2017.11.053

• Radiation tolerant materials
• Amorphous silicon oxycarbide
• FTIR
• Microstructure-property correlation

The microstructure and mechanical properties of amorphous silicon oxycarbide (SiOC) before and after irradiation were investigated using Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), Rutherford backscattering spectrometry (RBS), nuclear reaction analysis and nano-indentation. SiOC films of different compositions were subjected 1 displacement per atom (dpa) He+ irradiation. The irradiation results in a decrease of Si-O-Si bond angle and an increase of average coordination number. These microstructure variations are associated with increases of hardness and Young's modulus. Our findings reveal that mechanical properties correlate with the Si-O-Si bond angle and average coordination number in irradiated amorphous SiOC alloys.

• 出版日期2018-3-15