Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma

Y. Ueda; M. Oya; Y. Hamaji; H. T. Lee; H. Kurishita; Y. Torikai; N. Yoshida; A. Kreter; J. W. Coenen; A. Litnovsky; V. Philipps

doi:10.1088/0031-8949/2014/T159/014038

Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma

Y. Ueda, M. Oya, Y. Hamaji, H. T. Lee, H. Kurishita, Y. Torikai, N. Yoshida, A. Kreter, J. W. Coenen, A. Litnovsky, V. Philipps

Research output: Contribution to journal › Conference article › peer-review

14 Citations (Scopus)

Abstract

In order to evaluate the applicability of toughened, fine-grained, recrystallized (TFGR)-W to tokamak edge plasma environment, two TFGR-W specimens (TFGR-W 1.1wt%TiC and TFGR-W 3.3wt%TaC) were exposed to 31 identical ohmic discharges in the TEXTOR tokamak by means of a limiter lock system. The highest surface temperature reached was about 1300 °C. Under these temperature conditions, the bulk microstructure and dispersoids distribution of both TFGR-W remained intact, suggesting that these TFGR-W tungsten materials have sufficient stability under these plasma loading conditions. The erosion of TiC dispersoids on the surface was enhanced by plasma exposure above 1150 °C, while such enhanced erosion was not observed for TaC dispersoids probably due to the higher melting temperature of Ta than Ti.

Original language	English
Article number	014038
Journal	Physica Scripta
Volume	T159
DOIs	https://doi.org/10.1088/0031-8949/2014/T159/014038
Publication status	Published - 2014
Externally published	Yes
Event	14th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2013 - Julich, Germany Duration: May 13 2013 → May 17 2013

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Mathematical Physics
Condensed Matter Physics

Access to Document

10.1088/0031-8949/2014/T159/014038

Cite this

@article{6ef4d9cd11d54f3ca343e669aec26cbd,

title = "Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma",

abstract = "In order to evaluate the applicability of toughened, fine-grained, recrystallized (TFGR)-W to tokamak edge plasma environment, two TFGR-W specimens (TFGR-W 1.1wt%TiC and TFGR-W 3.3wt%TaC) were exposed to 31 identical ohmic discharges in the TEXTOR tokamak by means of a limiter lock system. The highest surface temperature reached was about 1300 °C. Under these temperature conditions, the bulk microstructure and dispersoids distribution of both TFGR-W remained intact, suggesting that these TFGR-W tungsten materials have sufficient stability under these plasma loading conditions. The erosion of TiC dispersoids on the surface was enhanced by plasma exposure above 1150 °C, while such enhanced erosion was not observed for TaC dispersoids probably due to the higher melting temperature of Ta than Ti.",

author = "Y. Ueda and M. Oya and Y. Hamaji and Lee, {H. T.} and H. Kurishita and Y. Torikai and N. Yoshida and A. Kreter and Coenen, {J. W.} and A. Litnovsky and V. Philipps",

note = "Copyright: Copyright 2014 Elsevier B.V., All rights reserved.; 14th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2013 ; Conference date: 13-05-2013 Through 17-05-2013",

year = "2014",

doi = "10.1088/0031-8949/2014/T159/014038",

language = "English",

volume = "T159",

journal = "Physica Scripta",

issn = "0281-1847",

publisher = "Institute of Physics",

}

TY - JOUR

T1 - Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma

AU - Ueda, Y.

AU - Oya, M.

AU - Hamaji, Y.

AU - Lee, H. T.

AU - Kurishita, H.

AU - Torikai, Y.

AU - Yoshida, N.

AU - Kreter, A.

AU - Coenen, J. W.

AU - Litnovsky, A.

AU - Philipps, V.

PY - 2014

Y1 - 2014

N2 - In order to evaluate the applicability of toughened, fine-grained, recrystallized (TFGR)-W to tokamak edge plasma environment, two TFGR-W specimens (TFGR-W 1.1wt%TiC and TFGR-W 3.3wt%TaC) were exposed to 31 identical ohmic discharges in the TEXTOR tokamak by means of a limiter lock system. The highest surface temperature reached was about 1300 °C. Under these temperature conditions, the bulk microstructure and dispersoids distribution of both TFGR-W remained intact, suggesting that these TFGR-W tungsten materials have sufficient stability under these plasma loading conditions. The erosion of TiC dispersoids on the surface was enhanced by plasma exposure above 1150 °C, while such enhanced erosion was not observed for TaC dispersoids probably due to the higher melting temperature of Ta than Ti.

AB - In order to evaluate the applicability of toughened, fine-grained, recrystallized (TFGR)-W to tokamak edge plasma environment, two TFGR-W specimens (TFGR-W 1.1wt%TiC and TFGR-W 3.3wt%TaC) were exposed to 31 identical ohmic discharges in the TEXTOR tokamak by means of a limiter lock system. The highest surface temperature reached was about 1300 °C. Under these temperature conditions, the bulk microstructure and dispersoids distribution of both TFGR-W remained intact, suggesting that these TFGR-W tungsten materials have sufficient stability under these plasma loading conditions. The erosion of TiC dispersoids on the surface was enhanced by plasma exposure above 1150 °C, while such enhanced erosion was not observed for TaC dispersoids probably due to the higher melting temperature of Ta than Ti.

UR - http://www.scopus.com/inward/record.url?scp=84902162717&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902162717&partnerID=8YFLogxK

U2 - 10.1088/0031-8949/2014/T159/014038

DO - 10.1088/0031-8949/2014/T159/014038

M3 - Conference article

AN - SCOPUS:84902162717

SN - 0281-1847

VL - T159

JO - Physica Scripta

JF - Physica Scripta

M1 - 014038

T2 - 14th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2013

Y2 - 13 May 2013 through 17 May 2013

ER -

Surface erosion and modification of toughened, fine-grained, recrystallized tungsten exposed to TEXTOR edge plasma

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this