Deuterium release and microstructure of tantalum–tungsten twin limiter exposed in TEXTOR-94
Deuterium release and microstructure of tantalum–tungsten twin limiter exposed in TEXTOR-94
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DOI：
10.1016/s0022-3115(02)01090-5
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发表时间：
2002-12
影响因子：
3.1
通讯作者：
T. Hirai;V. Philipps;T. Tanabe;M. Wada;A. Huber;S. Brezinsek;J. Seggern;J. Linke;T. Ohgo;K. Ohya;P. Wienhold;A. Pospieszczyk;G. Sergienko
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文献类型：
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作者：
T. Hirai;V. Philipps;T. Tanabe;M. Wada;A. Huber;S. Brezinsek;J. Seggern;J. Linke;T. Ohgo;K. Ohya;P. Wienhold;A. Pospieszczyk;G. Sergienko
在TEXTOR-94上进行了Ta-W双限幅器实验。在放电过程中观察到Dβ和Dγ强度。结果，来自Ta表面的强度小于来自W表面的强度。这归因于从表面的分子和原子的释放比率，即从Ta的较少原子释放和较多分子释放。关于Ta中的长期D保留，D在限制器上均匀分布，每个Ta原子的含量约为4×10−5D。Ta限制器中的总量估计为半限制器中的3× 1020 D。暴露后，Ta块体显示出显着的改性表面：晶粒生长，褶皱状变形和局部再结晶。然而，在相同的条件下，其中W产生大的开放裂纹暴露在Ta中没有观察到开放裂纹。
Ta–W twin limiter experiments had been carried out in TEXTOR-94. Dβand Dγintensities were observed during discharges. As a result, the intensities from the Ta surface were less than those from the W surface. This is attributed to the release ratio of molecules and atoms from the surface, i.e. less atomic release and more molecular release from Ta. Concerning long term D retention in Ta, D distributed uniformly over the limiter and the content was about 4×10−5D per Ta atom. The total amount in the Ta limiter was estimated 3×1020D in the half limiter. After exposure, the Ta bulk showed a significantly modified surface: grain growth, wrinkle like deformations and local recrystallization. However, open cracks were not observed in Ta exposed in the same condition in which W created big open crack.