High-strength anisotropic ZrC/YSZ composite foams achieved by in situ carbothermal reduction of ice-templated YSZ foamsOA
Achieving high strength in porous zirconium carbide(ZrC)-based ceramics is notoriously challenging,primarily due to their high inherent porosity.Here,we present a creative,in situ synthesis strategy that utilizes anisotropic 3 mol%yttria-stabilized zirconia(YSZ)ice-templated foam as a reactive template.This novel approach yields a ZrC/YSZ composite foam with a high average axial compressive strength of 61.5 MPa at a porosity of~70.9%at room temperature.The ZrC phase nucleates and grows for the first time within dense YSZ struts,not just on the surface.This unique reaction is intimately linked to the redistribution of Y^(3+)ions and the consequent tetragonal(t)to cubic(c)phase transformation in the YSZ matrix.Phase transformation in the matrix is a critical internal lever governing the mechanical properties,in some cases exceeding the influence of geometric factors.This research not only offers a new route to fabricate highstrength ultrahigh-temperature ceramic composite foams but also unveils the intricate interplay between their internal reaction chemistry and macroscopic mechanical strength.
Xiaohui Fan;Qianyu Yao;Na Ni;Xin Wang;Kolan Madhav Reddy;Fangwei Guo;Xiaofeng Zhao
Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,ChinaHuawei Technologies Co.,Ltd.,Shenzhen 518129,ChinaKey Lab of Education Ministry for Power Machinery and Engineering,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,ChinaWiseyear Technology Co.,Ltd.,Haining 314400,ChinaShanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,ChinaShanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,ChinaShanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
通用工业技术
zirconium carbide(ZrC)ice templatingfoammechanical properties
《Journal of Advanced Ceramics》 2026 (3)
P.71-81,11
supported by the opening project(No.6142912200202)from the National Key Laboratory of Science and Technology for National Defense on High-Strength Structural Materials(Central South University)supported by the National Natural Science Foundation of China(Nos.52373292 and 51902197)the Fundamental Research Funds for the Central Universities(Nos.24X010301285 and 21X010301700).
评论