Radiation tolerance of Cu/W multilayered nanocomposites

Gao, Yuan; Yang, Tonghai; Xue, Jianming; Zhou, Shengqiang; Wang, Yugang; Kwok, Dixon T. K.; Chu, Paul K.; Zhang, Yongfeng

doi:10.1016/j.jnucmat.2011.03.030

Cited by 133 publications

(39 citation statements)

References 34 publications

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“…They have been especially fruitful for investigations of the nucleation, growth, and interaction of helium (He) precipitates at fcc/bcc interfaces [4][5][6][7]. To date, however, experimental imaging of He precipitates at these interfaces has been confined to viewing the interfaces edge-on [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Imaging the in-plane distribution of helium precipitates at a Cu/V interface

Chen

Yuryev

et al. 2017

Materials Research Letters

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We describe a transmission electron microscopy investigation of the distribution of helium precipitates within the plane of an interface between Cu and V. Statistical analysis of precipitate locations reveals a weak tendency for interfacial precipitates to align along 110 -type crystallographic directions within the Cu layer. Comparison of these findings with helium-free Cu/V interfaces suggests that the precipitates may be aggregating preferentially along atomic-size steps in the interface created by threading dislocations in the Cu layer. Our observations also suggest that some precipitates may be aggregating along intersections between interfacial misfit dislocations. IMPACT STATEMENTThe innovation of this paper is providing the first plane-view experimental images of in-plane helium precipitate distributions at an interface between physical vapor deposited face-centered cubic (fcc) and body-centered cubic (bcc) metals. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Imaging the in-plane distribution of helium precipitates at a Cu/V interface

Chen

Yuryev

et al. 2017

Materials Research Letters

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“…[21][22][23][24][25][26] Radiation responses of multilayers with well-controlled layer interfaces were increasingly investigated. [10][11][12][27][28][29][30][31][32] In metallic multilayers, various types of interfaces have been intensively studied, including FCC/BCC interfaces (e.g., Cu/Nb, 11,12,33,34 Cu/V, [35][36][37] Cu/Mo, 38 Cu/W, 39 Al/Nb, 40 and Ag/V 41,42 ), FCC/FCC interfaces (e.g., Cu/Ni, 43 Ag/Ni, 44,45 and Cu/FCC Co 46 ), and BCC/BCC interfaces (Fe/W 47 ), where FCC and BCC stand for face-centered cubic and body-centered cubic, respectively. In general, immiscible layer interfaces appear to be effective sinks to mitigate radiation induced defect clusters.…”

Section: Introductionmentioning

confidence: 99%

Enhanced radiation tolerance in immiscible Cu/Fe multilayers with coherent and incoherent layer interfaces

Chen

Kobayashi

et al. 2015

J. Mater. Res.

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Recent studies have shown that chemical immiscibility is important to achieve enhanced radiation tolerance in metallic multilayers as immiscible layer interfaces are more stable against radiation induced mixing than miscible interfaces. However, as most of these immiscible systems have incoherent interfaces, the influence of coherency on radiation resistance of immiscible systems remains poorly understood. Here, we report on radiation response of immiscible Cu/Fe multilayers, with individual layer thickness h varying from 0.75 to 100 nm, subjected to He ion irradiation. When interface is incoherent, the peak bubble density decreases with decreasing h and reaches a minimum when h is 5 nm. At even smaller h when interface is increasingly coherent, the peak bubble density increases again. However, void swelling in coherent multilayers with smaller h remains less than those in incoherent multilayers. Our study suggests that the coherent immiscible interface is also effective to alleviate radiation induced damage.

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“…While in early work solute atoms were used for this purpose [6][7][8], recently more approaches have focused on nanostructured materials containing large fractions of incoherent, or semi-coherent, interphase boundaries or large concentrations of grain boundaries. For instance, recent studies have in fact disclosed that interfaces in multilayered nanocomposites such as Cu/Nb, W/Ni, Fe/W, Cu/W and others, can act as sinks for radiation induced defects, and this provides enhanced radiation tolerance as compared to conventional single-phase bulk metals [9][10][11][12]. However, the fundamental principles of radiation blistering in multilayered nanocomposites are not yet clearly understood.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is interesting to study the influence of temperature on the growth of gas bubbles in nanocomposite materials during helium ion-irradiation, especially for the stacks composed of two very different materials (for example Cu/W nanocomposite material, the melting points of elemental Cu and W are 1084°C and 3422°C, respectively) [12]. The present work investigates the microstructural development and growth of gas bubbles in Cu/ W(Re, 5.9 at.%) (referred as Cu/W(Re) in this paper) multilayered structures induced by helium irradiation at temperature range from 300 K to 673 K. The Cu/W(Re) nanocomposites was chosen for several reasons: (i) the melting points of Cu and W(Re, 5.9 at.%) is 1084°C and 3300°C, respectively [15].…”

Section: Introductionmentioning

confidence: 99%