Thermal Conductivity of Diamond/SiC Nano-Polycrystalline Composites and Phonon Scattering at Interfaces
Thermal Conductivity of Diamond/SiC Nano-Polycrystalline Composites and Phonon Scattering at Interfaces
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DOI：
10.1021/acsomega.7b00476
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发表时间：
2017-05
期刊：
影响因子：
4.1
通讯作者：
Huicong Dong;B. Wen;Yuwen Zhang;R. Melnik
中科院分区：
文献类型：
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作者：
Huicong Dong;B. Wen;Yuwen Zhang;R. Melnik
为了比较非均相界面和非均相界面的热性能，提出了多晶复合材料。利用分子动力学模拟研究了复合材料中非均相界面和非均相界面的热性能。结果表明，当热量来源于同一材料时，非均质界面声子散射比均匀界面声子散射强。声子波包模拟结果表明，声子在非均质界面处的强散射是由传输系数和传输时间共同作用的结果。
To compare the thermal properties of heterogeneous and homogeneous interfaces, polycrystalline composites are proposed. Thermal properties of heterogeneous and homogeneous interfaces in the composites are investigated using molecular dynamics simulations. The results indicate that when the inflow of heat arises from the same material, phonon scattering at heterogeneous interfaces is stronger than that at homogeneous interfaces. The phonon wave packet simulations indicate that the stronger phonon scattering at heterogeneous interfaces is caused by the combined actions of transmission coefficients and transmission time.