Oxygen contamination on the surface of ZrB₂ powders and its removal

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• 作者：Hai-Bin Ma^a ; ^b ; ^c ; Ji Zou^d ; ^{zouji1983@mail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{zouji1983@aliyun.com" class="auth_mail" title="E-mail the corresponding author} ; Ping Lu^c ; Jing-Ting Zhu^b ; ^c ; Zheng-Qian Fu^c ; Fang-Fang Xu^c ; ^{ffxu@mail.sic.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Guo-Jun Zhang^a ; ^c ; ^{gjzhang@dhu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Borides ; Surface oxygen impurities ; High-resolution electron microscopy (HREM) ; Electron energy loss spectroscopy (EELS) ; X-ray photoelectron spectroscopy (XPS)
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：127
• 期：Complete
• 页码：160-164
• 全文大小：1248 K

文摘

Surface oxygen impurities have been well proved to accelerate the ceramic particle coarsening during sintering, therefore impede the densification of non-oxide ceramics. However, the characteristic of these impurities is still poorly understood. In this work, several state-of-the-art technologies on microscopy and microanalysis techniques were combined to investigate the bonding character, morphology and composition of oxygen contamination on ZrB₂ powders. The assemblage of light elements, i.e. O, C, N, B and Si on the surface and in the lattice of the ZrB₂ powders was thoroughly analyzed and compared before and after its removal upon heating.