Modification of tungsten coated carbon by low energy and high flux deuterium irradiation
Modification of tungsten coated carbon by low energy and high flux deuterium irradiation
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DOI：
10.1016/s0022-3115(02)01093-0
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发表时间：
2002-12
影响因子：
3.1
通讯作者：
K. Tokunaga;R. Doerner;R. Seraydarian;N. Noda;N. Yoshida;T. Sogabe;T. Kato;B. Schedler
中科院分区：
文献类型：
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作者：
K. Tokunaga;R. Doerner;R. Seraydarian;N. Noda;N. Yoshida;T. Sogabe;T. Kato;B. Schedler
等离子喷涂钨涂层碳纤维复合材料（VPS-W/CX-2002 U）和粉末冶金钨（PM-W）已经暴露于708至843 K范围内的低能量（100 eV）的高氘通量（1022 m-2s-1）。表面改性和氘保留暴露后进行了研究，以证明这种材料在聚变装置中的适用性。通过7.5× 1025 m −2的氘辐射，在PM-W上形成气泡。气泡的数量和它们的平均尺寸随着注量增加到3.00× 1026 m −2而增加。另一方面，在VPS-W/CX-2002 U上未观察到改性。VPS-W/CX-2002 U在氘辐照下的脱附行为与PM-W不同。PM-W释放D2和HD的峰值温度约为703 K。VPS-W/CX-2002 U的脱附曲线随温度的升高而逐渐增大，直至1273 K。
Plasma sprayed tungsten coated carbon fiber composites (VPS-W/CX-2002U) and powder metallurgy tungsten (PM-W) have been exposed to a high deuterium flux (≃1022m−2s−1) with low energy (100 eV) in a range from 708 to 843 K. Surface modification and deuterium retention after the exposure have been investigated to prove the suitability of such materials in fusion devices. Blisters are formed on the PM-W by deuterium irradiation with a fluence of 7.5×1025m−2. The amount of blisters and their average size increase with an increase of a fluence to 3.00×1026m−2. On the other hand, no modification is observed on VPS-W/CX-2002U. Desorption of VPS-W/CX-2002U irradiated by deuterium is different from that of PM-W. The peak temperature of D2and HD release from PM-W is about 703 K. However, the desorption curve of VPS-W/CX-2002U gradually increases with increasing temperature up to 1273 K.