Defect engineering in development of low thermal conductivity materials: A review

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• 作者：Meng Zhao^a ; ^{zhao-m07@mails.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Wei Pan^a ; ^{panw@mail.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Chunlei Wan^a ; ^{wancl@mail.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Zhixue Qu^b ; ^{quzhixue@bjut.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Zheng Li^a ; ^{lizheng13@mails.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jun Yang^a ; ^{yangjun13@mails.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Thermal conductivity ; Defect engineering ; Phonon scattering ; Thermal barrier coatings
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：37
• 期：1
• 页码：1-13
• 全文大小：4356 K

文摘

Low thermal conductivity is the key property dominating the heat insulation ability of thermal barrier coatings (TBC). Reducing the intrinsic thermal conductivity is the major topic for developing advanced TBCs. Defect engineering has attracted much attention in seeking better TBC materials since lattice defects play a crucial role in phonon scattering and thermal conductivity reduction. Oxygen vacancies and substitutions are proven to be the most effective, while the accompanying lattice distortion is also of great importance. In this paper, recent advances of reducing the thermal conductivity of potential thermal barrier coating materials by defect engineering are comprehensively reviewed. Effects of the mass and size mismatch between the defects and the host lattice are quantitatively estimated and unconventional thermal conductivity reduction caused by the lattice distortions is also discussed. Finally, challenges and potential opportunities are briefly assessed to further minimize the thermal conductivity of TBC materials in the future.