Formation Mechanism of Micropores on the Surface of Pure Aluminum Induced by High-Current Pulsed Electron Beam Irradiation

The mechanism of micropores formed on the surface of polycrystalline pure aluminum under high-current pulsed electron beam (HCPEB) irradiation is explained. It is discovered that dispersed micropores with sizes of 0.1-1 mu m on the irradiated surface of pure aluminum can be successfully fabricated a...

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Published inChinese physics letters Vol. 28; no. 11; pp. 116102 - 1-116102-4
Main Authors Zou, Yang (阳邹), Cai, Jie (杰蔡), Wan, Ming-Zhen (明珍 万), Lv, Peng (鹏吕), Guan, Qing-Feng (庆丰 关)
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2011
Subjects
Aluminum
Electron beams
Formations
Grain boundaries
Irradiation
Migration
Porous materials
Vacancies
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/28/11/116102

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Summary:The mechanism of micropores formed on the surface of polycrystalline pure aluminum under high-current pulsed electron beam (HCPEB) irradiation is explained. It is discovered that dispersed micropores with sizes of 0.1-1 mu m on the irradiated surface of pure aluminum can be successfully fabricated after HCPEB irradiation. The dominant formation mechanism of the surface micropores should be attributed to the formation of supersaturation vacancies within the near surface during the HCPEB irradiation and the migration of vacancies along grain boundaries and/or dislocations towards the irradiated surface. It is expected that the HCPEB technique will become a new method for the rapid synthesis of surface porous materials.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/28/11/116102