期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 33, 期 43, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-648X/ac18f2
关键词
inclusion; molecular dynamics; 4H-SiC; nano-scratching
资金
- National Natural Science Foundation of China [52075208, U20A6004]
In this study, the impact of inclusions on scratching behavior during SiC epitaxy was explored through molecular dynamics modeling. It was found that inclusions significantly affect the microstructure, atomistic behavior, and machinability. Eliminating inclusions requires a high penetration depth, but increases the sensitivity of process parameters.
Inclusion, a common three-dimension defect, can be introduced during SiC epitaxy. In this study, we constructed nano-scratching molecular dynamics models embedded in two common types of inclusion-C-inclusion and Si-inclusion-to explore the effect of inclusion during scratching. Furthermore, the microstructure and atomistic behavior, surface morphology, scratching force, stress, and temperature were analyzed to bridge the simulation and processing parameters. The results showed that inclusion could affect the microstructure and atomistic behavior, and machinability. To eliminate inclusion completely, high penetration depth was required, but it would promote the process parameter sensitivity of inclusion. In summary, the behavior of C-inclusion embedded in SiC more likes a hard particle, while the behavior of Si-inclusion embedded in SiC more likes a soft particle.
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