Highly porous multicomponent (Hf1/3Ta1/3Nb1/3)C ultra-high temperature ceramic with low thermal conductivity

Autor:	Zhen Wu, Zhuojie Shao, Haikun Chen, Jingyang Wang, Junning Li, Xianpeng Liang
Rok vydání:	2021
Předmět:	Materials science business.industry Compressive strength Thermal conductivity Thermal insulation visual_art Highly porous visual_art.visual_art_medium General Materials Science Thermal stability Ceramic Composite material business Porosity Mechanical reliability
Zdroj:	Materialia. 18:101158
ISSN:	2589-1529
DOI:	10.1016/j.mtla.2021.101158
Popis:	Fundamental requirements of ultra-high temperature ceramic (UHTC) thermal insulators are excellent thermal stability above 1800 °C, good thermal insulation capability, and high mechanical reliability. We report foam-gelcasting-freeze drying method to fabricate porous multicomponent (Hf1/3Ta1/3Nb1/3)C UHTC with superhigh porosity (90.0-94.0%). The as-prepared samples show low density (0.70–1.17 g/cm3), moderately high compressive strength (0.34–1.34 MPa), low thermal conductivity (0.089–0.098 W/(m•K)), and excellent ultra-high temperature stability (low shrinkage of
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b64d121476eacb00e33f3597f044700 https://doi.org/10.1016/j.mtla.2021.101158 Zobrazit plný text záznamu Full Text from ScienceDirect