Low thermal conductivity Hf6Ta2O17 ceramics fabricated by solvothermal and pressure-less sintering

被引：31

作者：

Li, Hao ^{[1
]}

Yu, Yiping ^{[1
]}

Wang, Song ^{[1
]}

Xiao, Peng ^{[1
]}

Hu, Taotao ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 12期

关键词：

Solvothermal method; Pressure-less sintering; Thermophysical property; Thermal barrier coatings; HIGH-TEMPERATURE; EXPANSION; PRECURSOR;

D O I：

10.1016/j.ceramint.2021.03.091

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present work, single-phase Hf6Ta2O17 spherical powders with uniform particle sizes were successfully synthesized by a solvothermal method and heat treatment at a relatively low temperature (1000 degrees C). After pressure-less sintering at 1700 degrees C, bulk ceramics with a relative density of 96.30% could be obtained, and the micromorphology was combined by large rod-shaped particles. The thermophysical property of Hf6Ta2O17 ceramics and the influencing factors were investigated. The thermal conductivity was 1.62 W/(m center dot K) at 1500 degrees C, which was lower than that of traditional 8YSZ, indicating that Hf6Ta2O17 was more suitable for thermal barrier coatings. Doping other elements could be expected to improve the properties of Hf6Ta2O17 ceramics.

引用

页码：17711 / 17718

页数：8

共 33 条

[1] Crystal plasticity assessment of inclusion- and matrix-driven competing failure modes in a nickel-base superalloy
Bandyopadhyay, Ritwik
Sangid, Michael D.
[J]. ACTA MATERIALIA, 2019, 177 : 20 - 34
[2] New double-ceramic-layer thermal barrier coatings based on zirconia-rare earth composite oxides
Cao, XQ
Vassen, R
Tietz, F
Stoever, D
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2006, 26 (03) : 247 - 251
[3] Molten salt attack on multilayer and functionally-graded YSZ coatings
Carpio, Pablo
Dolores Salvador, M.
Borrell, Amparo
Navarro, Lucia
Sanchez, Enrique
[J]. CERAMICS INTERNATIONAL, 2018, 44 (11) : 12634 - 12641
[4] [陈琳 Chen Lin], 2017, [中国材料进展, Materials China], V36, P938
[5] Dongming Zhu, 2002, Ceramic Engineering and Science Proceedings, V23, P457
[6] Comparative study on tribological and corrosion protection properties of plasma sprayed Cr2O3-YSZ-SiC ceramic coatings
Hashemi, S. M.
Parvin, N.
Valefi, Z.
Alishahi, M.
[J]. CERAMICS INTERNATIONAL, 2019, 45 (17) : 21108 - 21119
[7] [何明涛 He Mingtao], 2019, [粉末冶金技术, Powder Metallurgy Technology], V37, P62
[8] Phonon scattering by oxygen vacancies in ceramics
Klemens, PG
[J]. PHYSICA B, 1999, 263 : 102 - 104
[9] THERMAL BARRIER COATINGS MANUFACTURED BY SUSPENSION PLASMA SPRAYING - A REVIEW
Latka, L.
[J]. ADVANCES IN MATERIALS SCIENCE, 2018, 18 (03): : 95 - 117
[10] Leitner J, 2003, THERMOCHIM ACTA, V395, P27

← 1 2 3 4 →