Micro-structured tungsten: an advanced plasma-facing material

被引：19

作者：

Terra, A. ^{[1
]}

Sergienko, G. ^{[1
]}

Tokar, M. ^{[1
]}

Borodin, D. ^{[1
]}

Dittmar, T. ^{[1
]}

Huber, A. ^{[1
]}

Kreter, A. ^{[1
]}

Martynova, Y. ^{[1
]}

Moeller, S. ^{[1
]}

Rasinski, M. ^{[1
]}

Wirtz, M. ^{[1
]}

Loewenhoff, Th ^{[1
]}

Dorow-Gerspach, D. ^{[1
]}

Yuan, Y. ^{[2
]}

Brezinsek, S. ^{[1
]}

Unterberg, B. ^{[1
]}

Linsmeier, Ch ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Energie & Klimaforsch, D-52425 Julich, Germany

[2] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

来源：

NUCLEAR MATERIALS AND ENERGY | 2019年 / 19卷

关键词：

Micro-structured tungsten; PFC; PFM; High heat load; Thermal cycling; Retention; Erosion; Emissivity; DUCTILISATION;

D O I：

10.1016/j.nme.2019.02.007

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A micro-structuring of the tungsten plasma-facing surface can strongly reduce near surface thermal stresses induced by ELM heat fluxes. This approach has been confirmed by numerical simulations with the help of ANSYS software. For experimental tests, two 10 x 10 mm(2) samples of micro-structured tungsten were manufactured. These consisted of 2000 and 5000 vertically packed tungsten fibres with dimensions of empty set240 mu m x 2.4 mm and empty set150 mu m x 2.4 mm, respectively. The 1.2 mm bottom parts of the fibres are embedded in a copper matrix. The top parts of the fibres have gaps about of 10 mu m so they are not touching each others. The top of all tungsten fibres was electro-polished. A Nd:YAG laser with a pulse duration 1 ms and a pulse repetition frequency of 25 Hz was used to simulate up to 10(5) ELM-like heat pulses. No damage on either of the micro-structured tungsten samples were observed. Neon plasma erosion rate and fuel retention of the micro-structured tungsten samples were almost identical to bulk tungsten samples.

引用

页码：7 / 12

页数：6

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