Effect of Y doping on microstructure and thermophysical properties of yttria stabilized hafnia ceramics

Chun Li; Yue Ma; Zhaolu Xue; Yonghong Yang; Jianhua Chen; Hongbo Guo

doi:10.1016/j.ceramint.2018.07.030

Effect of Y doping on microstructure and thermophysical properties of yttria stabilized hafnia ceramics

Chun Li
, Yue Ma
, Zhaolu Xue
, Yonghong Yang
, Jianhua Chen
, Hongbo Guo^*

^*Corresponding author for this work

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

A series of Y₂O₃-doped HfO₂ ceramics (Hf_1-xY_xO_2-0.5×, x = 0, 0.04, 0.08, 0.12, 0.16 and 0.2) were synthesized by solid-state reaction at 1600 °C. The microstructure, thermophysical properties and phase stability were investigated. Hf_1-xY_xO_2–0.5 _x ceramics were comprised of monoclinic (M) phase and cubic (C) phase when Y³⁺ ion concentration ranged from 0.04 to 0.16. The thermal conductivity of Hf_1-xY_xO_2–0.5 _x ceramic decreased as Y³⁺ ion concentration increased and Hf_0.8Y_0.2O_1.9 ceramic revealed the lowest thermal conductivity of ~ 1.8 W/m*K at 1200 °C. The average thermal expansion coefficient (TEC) of Hf_1-xY_xO_2–0.5 _x between 200 °C and 1300 °C increased with the Y³⁺ ion concentration. Hf_0.8Y_0.2O_1.9 yielded the highest TEC of ~ 10.4 × 10⁻⁶ K⁻¹ while keeping good phase stability between room temperature and 1600 °C.

Original language	English
Pages (from-to)	18213-18221
Number of pages	9
Journal	Ceramics International
Volume	44
Issue number	15
DOIs	https://doi.org/10.1016/j.ceramint.2018.07.030
State	Published - 15 Oct 2018

Keywords

Microstructure
Phase stability
Thermophysical properties
Yttria stabilized hafnia (YSH)

Access to Document

10.1016/j.ceramint.2018.07.030

Cite this

@article{39e6f5603fd3468e8447779964afd5a0,

title = "Effect of Y doping on microstructure and thermophysical properties of yttria stabilized hafnia ceramics",

abstract = "A series of Y2O3-doped HfO2 ceramics (Hf1-xYxO2-0.5×, x = 0, 0.04, 0.08, 0.12, 0.16 and 0.2) were synthesized by solid-state reaction at 1600 °C. The microstructure, thermophysical properties and phase stability were investigated. Hf1-xYxO2–0.5 x ceramics were comprised of monoclinic (M) phase and cubic (C) phase when Y3+ ion concentration ranged from 0.04 to 0.16. The thermal conductivity of Hf1-xYxO2–0.5 x ceramic decreased as Y3+ ion concentration increased and Hf0.8Y0.2O1.9 ceramic revealed the lowest thermal conductivity of \textasciitilde{} 1.8 W/m*K at 1200 °C. The average thermal expansion coefficient (TEC) of Hf1-xYxO2–0.5 x between 200 °C and 1300 °C increased with the Y3+ ion concentration. Hf0.8Y0.2O1.9 yielded the highest TEC of \textasciitilde{} 10.4 × 10−6 K−1 while keeping good phase stability between room temperature and 1600 °C.",

keywords = "Microstructure, Phase stability, Thermophysical properties, Yttria stabilized hafnia (YSH)",

author = "Chun Li and Yue Ma and Zhaolu Xue and Yonghong Yang and Jianhua Chen and Hongbo Guo",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = oct,

day = "15",

doi = "10.1016/j.ceramint.2018.07.030",

language = "英语",

volume = "44",

pages = "18213--18221",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "15",

}

TY - JOUR

T1 - Effect of Y doping on microstructure and thermophysical properties of yttria stabilized hafnia ceramics

AU - Li, Chun

AU - Ma, Yue

AU - Xue, Zhaolu

AU - Yang, Yonghong

AU - Chen, Jianhua

AU - Guo, Hongbo

PY - 2018/10/15

Y1 - 2018/10/15

N2 - A series of Y2O3-doped HfO2 ceramics (Hf1-xYxO2-0.5×, x = 0, 0.04, 0.08, 0.12, 0.16 and 0.2) were synthesized by solid-state reaction at 1600 °C. The microstructure, thermophysical properties and phase stability were investigated. Hf1-xYxO2–0.5 x ceramics were comprised of monoclinic (M) phase and cubic (C) phase when Y3+ ion concentration ranged from 0.04 to 0.16. The thermal conductivity of Hf1-xYxO2–0.5 x ceramic decreased as Y3+ ion concentration increased and Hf0.8Y0.2O1.9 ceramic revealed the lowest thermal conductivity of ~ 1.8 W/m*K at 1200 °C. The average thermal expansion coefficient (TEC) of Hf1-xYxO2–0.5 x between 200 °C and 1300 °C increased with the Y3+ ion concentration. Hf0.8Y0.2O1.9 yielded the highest TEC of ~ 10.4 × 10−6 K−1 while keeping good phase stability between room temperature and 1600 °C.

AB - A series of Y2O3-doped HfO2 ceramics (Hf1-xYxO2-0.5×, x = 0, 0.04, 0.08, 0.12, 0.16 and 0.2) were synthesized by solid-state reaction at 1600 °C. The microstructure, thermophysical properties and phase stability were investigated. Hf1-xYxO2–0.5 x ceramics were comprised of monoclinic (M) phase and cubic (C) phase when Y3+ ion concentration ranged from 0.04 to 0.16. The thermal conductivity of Hf1-xYxO2–0.5 x ceramic decreased as Y3+ ion concentration increased and Hf0.8Y0.2O1.9 ceramic revealed the lowest thermal conductivity of ~ 1.8 W/m*K at 1200 °C. The average thermal expansion coefficient (TEC) of Hf1-xYxO2–0.5 x between 200 °C and 1300 °C increased with the Y3+ ion concentration. Hf0.8Y0.2O1.9 yielded the highest TEC of ~ 10.4 × 10−6 K−1 while keeping good phase stability between room temperature and 1600 °C.

KW - Microstructure

KW - Phase stability

KW - Thermophysical properties

KW - Yttria stabilized hafnia (YSH)

UR - https://www.scopus.com/pages/publications/85050628184

U2 - 10.1016/j.ceramint.2018.07.030

DO - 10.1016/j.ceramint.2018.07.030

M3 - 文章

AN - SCOPUS:85050628184

SN - 0272-8842

VL - 44

SP - 18213

EP - 18221

JO - Ceramics International

JF - Ceramics International

IS - 15

ER -

Effect of Y doping on microstructure and thermophysical properties of yttria stabilized hafnia ceramics

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this