Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material

Guensik Min; Yeonju Oh; Hwangsun Kim; Eunjoo Shin; Ki Baek Roh; Jeongseok Kim; Nojun Kwak; Yanghoo Kim; Hyoung Chan Kim; Gon Ho Kim; Heung Nam Han

doi:10.1016/j.jallcom.2023.169961

Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material

Guensik Min
, Yeonju Oh
, Hwangsun Kim
, Eunjoo Shin
, Ki Baek Roh
, Jeongseok Kim
, Nojun Kwak
, Yanghoo Kim
, Hyoung Chan Kim
, Gon Ho Kim
, Heung Nam Han

electron Microscopy and Microanalysis

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

12 Scopus citations

Abstract

Y₂O₃ is extensively used to fabricate oxide-dispersion-strengthened tungsten to refine grain size, improve thermal stability, and increase high-temperature strength. However, excessive Y₂O₃ addition weakens the grain-boundary strength, which increases the ductile-to-brittle transition temperature. Therefore, in this study, a small amount of Y-rich precipitates was dispersed in a tungsten matrix through internal oxidation during spark plasma sintering. The phase, morphology, and size of the Y-rich precipitates in the sintered tungsten were characterized by transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) analyses. Additionally, the effects of Y doping on sinterability, thermal stability, deuterium irradiation resistance, and mechanical properties were analyzed using Y-free pure tungsten specimens for comparison.

Original language	English
Article number	169961
Journal	Journal of Alloys and Compounds
Volume	953
DOIs	https://doi.org/10.1016/j.jallcom.2023.169961
State	Published - Aug 25 2023

Funding

This study was supported by National Research Foundation of Korea (NRF) grants funded by the Ministry of Science ( 2021R1A2C3005096 , 2019M3D1A1079215 and 1711139323 ) and the ITER Technology R&D Program . The research facilities at the Institute of Engineering Research at Seoul National University were also utilized for this study.

Keywords

Internal oxidation
Irradiation Resistance
Microstructure
Oxide dispersion strengthening
Spark Plasma Sintering
Tungsten

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10.1016/j.jallcom.2023.169961

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@article{34e80eaaceb746068bc065df901cd49d,

title = "Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material",

abstract = "Y2O3 is extensively used to fabricate oxide-dispersion-strengthened tungsten to refine grain size, improve thermal stability, and increase high-temperature strength. However, excessive Y2O3 addition weakens the grain-boundary strength, which increases the ductile-to-brittle transition temperature. Therefore, in this study, a small amount of Y-rich precipitates was dispersed in a tungsten matrix through internal oxidation during spark plasma sintering. The phase, morphology, and size of the Y-rich precipitates in the sintered tungsten were characterized by transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) analyses. Additionally, the effects of Y doping on sinterability, thermal stability, deuterium irradiation resistance, and mechanical properties were analyzed using Y-free pure tungsten specimens for comparison.",

keywords = "Internal oxidation, Irradiation Resistance, Microstructure, Oxide dispersion strengthening, Spark Plasma Sintering, Tungsten",

author = "Guensik Min and Yeonju Oh and Hwangsun Kim and Eunjoo Shin and Roh, \{Ki Baek\} and Jeongseok Kim and Nojun Kwak and Yanghoo Kim and Kim, \{Hyoung Chan\} and Kim, \{Gon Ho\} and Han, \{Heung Nam\}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = aug,

day = "25",

doi = "10.1016/j.jallcom.2023.169961",

language = "English",

volume = "953",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier",

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TY - JOUR

T1 - Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material

AU - Min, Guensik

AU - Oh, Yeonju

AU - Kim, Hwangsun

AU - Shin, Eunjoo

AU - Roh, Ki Baek

AU - Kim, Jeongseok

AU - Kwak, Nojun

AU - Kim, Yanghoo

AU - Kim, Hyoung Chan

AU - Kim, Gon Ho

AU - Han, Heung Nam

PY - 2023/8/25

Y1 - 2023/8/25

N2 - Y2O3 is extensively used to fabricate oxide-dispersion-strengthened tungsten to refine grain size, improve thermal stability, and increase high-temperature strength. However, excessive Y2O3 addition weakens the grain-boundary strength, which increases the ductile-to-brittle transition temperature. Therefore, in this study, a small amount of Y-rich precipitates was dispersed in a tungsten matrix through internal oxidation during spark plasma sintering. The phase, morphology, and size of the Y-rich precipitates in the sintered tungsten were characterized by transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) analyses. Additionally, the effects of Y doping on sinterability, thermal stability, deuterium irradiation resistance, and mechanical properties were analyzed using Y-free pure tungsten specimens for comparison.

AB - Y2O3 is extensively used to fabricate oxide-dispersion-strengthened tungsten to refine grain size, improve thermal stability, and increase high-temperature strength. However, excessive Y2O3 addition weakens the grain-boundary strength, which increases the ductile-to-brittle transition temperature. Therefore, in this study, a small amount of Y-rich precipitates was dispersed in a tungsten matrix through internal oxidation during spark plasma sintering. The phase, morphology, and size of the Y-rich precipitates in the sintered tungsten were characterized by transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) analyses. Additionally, the effects of Y doping on sinterability, thermal stability, deuterium irradiation resistance, and mechanical properties were analyzed using Y-free pure tungsten specimens for comparison.

KW - Internal oxidation

KW - Irradiation Resistance

KW - Microstructure

KW - Oxide dispersion strengthening

KW - Spark Plasma Sintering

KW - Tungsten

UR - https://www.scopus.com/pages/publications/85152646254

U2 - 10.1016/j.jallcom.2023.169961

DO - 10.1016/j.jallcom.2023.169961

M3 - Article

AN - SCOPUS:85152646254

SN - 0925-8388

VL - 953

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 169961

ER -

Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material

Abstract

Funding

Keywords

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