Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2

被引：13
作者：
Harju, Mika [1 ]
Jarn, Mikael [2 ]
Dahlsten, Per [2 ]
Nikkanen, Juha-Pekka [1 ]
Rosenholm, Jarl B. [2 ]
Mantyla, Tapio [1 ]
机构：
[1] Tampere Univ Technol, Dept Mat Sci, FIN-33101 Tampere, Finland
[2] Abo Akad Univ, Dept Phys Chem, Turku 20500, Finland
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 326卷 / 02期
关键词：
plasma spraying; chromia; zeta potential; IEP; dissolution; surface state;
D O I：
10.1016/j.jcis.2008.06.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of water exposure on the surface properties of plasma-sprayed Cr2O3 and Cr2O3-25 wt% TiO2 was studied. It was shown that both plasma-sprayed materials contained Cr(VI) hydrous oxide phases, which dissolved rapidly at the beginning of water exposure. The dissolution continued slowly during the whole water exposure time. The Cr(VI) dissolution was accompanied by a rapid increase in surface IEP value. Both Cr2O3 and Cr2O3-25 wt% TiO2 showed similar dissolution, zeta potential, and surface oxidation states. Thus the addition of TiO2 did not influence the surface properties of the plasmasprayed Cr2O3. (c) 2008 Elsevier Inc. All rights reserved.
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收藏
页码：403 / 410
页数：8
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