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| 1 | 激光辅助化学气相沉积研究进展显示文摘激光化学气相沉积技术(LCVD)相较于传统化学气相沉积技术具有低沉积温度、高膜层纯度、高沉积效率等特点,在各类功能薄膜材料制备上有着巨大的应用前景。围绕激光化学气相沉积技术,本文详细阐述了激光热解离、激光光解离与激光共振激发解离作用机制,同时介绍了各类LCVD的常用设备,着重总结了LCVD在金属材料、碳基材料、氧化物材料以及半导体材料等各类材料制备应用上的最新研究进展,特别介绍了LCVD制备过程中常用的检测与分析方法,最后讨论了激光化学气相沉积技术目前所面临的挑战与机遇,并展望了该技术的发展前景。 | 范丽莎 刘帆 吴国龙 Volodymyr S.Kovalenko 姚建华 | 2022 | 光电工程2022，49，2： | 6 |
| 2 | Composition optimization, high-temperature stability, and thermal cycling performance of Sc-doped Gd_(2)Zr_(2)O_(7) thermal barrier coatings: Theoretical and experimental studies显示文摘Sc was doped into Gd_(2)Zr_(2)O_(7) for expanding the potential for thermal barrier coating (TBC) applications. The solid solution mechanism of Sc in the Gd_(2)Zr_(2)O_(7) lattice, and the mechanical and thermophysical properties of the doped Gd_(2)Zr_(2)O_(7) were systematically studied by the first-principles method, based on which the Sc doping content was optimized. Additionally, Sc-doped Gd_(2)Zr_(2)O_(7) TBCs with the optimized composition were prepared by air plasma spraying using YSZ as a bottom ceramic coating (Gd-Sc/YSZ TBCs), and their sintering behavior and thermal cycling performance were examined. Results revealed that at low Sc doping levels, Sc has a large tendency to occupy the lattice interstitial sites, and when the doping content is above 11.11 at%, Sc substituting for Gd in the lattice becomes dominant. Among the doped Gd_(2)Zr_(2)O_(7), the composition with 16.67 at% Sc content has the lowest Pugh’s indicator (G/B) and the highest Poisson ratio (σ) indicative of the highest toughness, and the decreasing trends of Debye temperature and thermal conductivity slow down at this composition. By considering the mechanical and thermophysical properties comprehensively, the Sc doping content was optimized to be 16.67 at%. The fabricated Gd-Sc coatings remain phase and structural stability after sintering at 1400 ℃ for 100 h. Gd-Sc/YSZ TBCs exhibit excellent thermal shock resistance, which is related to the good thermal match between Gd-Sc and YSZ coatings, and the buffering effect of the YSZ coating during thermal cycling. These results revealed that Sc-doped Gd_(2)Zr_(2)O_(7) has a high potential for TBC applications, especially for the composition with 16.67 at% Sc content. | Lei GUO Bowen LI Yuxian CHENG Lu WANG | 2022 | Journal of Advanced Ceramics2022，11，3： | 1 |
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