Video Experimental Relacionado

Updated: Jan 29, 2026

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

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Published on: May 31, 2018

Efecto de la orientación cristalina en la evolución de bucles de dislocación bajo radiación electrónica en aluminio

Yupeng Yin¹, Qianfei Feng¹, Wentuo Han^1,2

¹School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Materials (Basel, Switzerland)

|January 28, 2026

Abstract:

Aluminum, the primary structural material used in spacecraft, operates in low Earth orbit (LEO). It is subjected to high-energy electron irradiation with energies ranging from 0.1 to 10 MeV, which produces significant irradiation damage. Understanding the characteristics of irradiation defects with crystallographic orientations is crucial for analyzing the failure of spacecraft components and for developing aerospace materials with improved irradiation resistance. In this study, pure aluminum was irradiated in situ at room temperature using 200 kV transmission electron microscopy. The irradiation defects were comparatively analyzed for four crystallographic orientations, focusing on the size, density, and interstitial content of <111> and <110> dislocation loops. For all four irradiation directions, the interstitial atom density (IAD) within <111> loops is significantly higher than that in <110> loops. Notably, under [110]-direction irradiation, IAD in <111> loops is approximately 55 times that in <110> loops. This phenomenon is attributed to the one-dimensional migration of <110> loops. Among the four irradiation directions, the total IAD in the two types of loops decreases in the order: [110] > [111] > [310] > [100]. The threshold displacement energy (E_d) of aluminum at room temperature is inferred to follow the relationship: [110] < [111] < [310] < [100].

Palabras clave:

orientación cristalográfica bucles de dislocación irradiación electrónica átomos de autointersticio energía de desplazamiento umbral

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