THE RELATION BETWEEN PREEXISTING DEFECTS ANDCHARGING-UP IN 9mol%Y2O3-ZrO2 STUDIED BYAUGER ELECTRON SPECLROSCOPY

• 来源期刊: 中国物理(海外版)
• 年，卷（期）: 2000,（3）
• 页码范围: 225-232
• 页数: 8页
• 语种: 英文

摘要

Electron beam damage and charging process in 9mol%Y2O3-stabilized zirconia (YS-ZrO2) are studied by Auger electron spectroscopy (AES). Electron bombardment induces electron-stimulated desorption at the surface on one hand; on the other hand, it modifies the preexisting defects in the irradiated zone. Both effects will lead to charging-up of YS-ZrO2. The charging related to the first effect can be compensated by an O2 environment of 6.5× 10-6 Pa, and the charging related to both effects can be inhibited by specimen heating up to 300 ℃. However, the modified preexisting defects will not return to their initial states prior to the radiation. Their charging behavior and charge compensation are discussed in the model of the variants of the oxygen vacancies.