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.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
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 -