Number of the records: 1
X-ray Computed Tomographic Investigation of the Porosity and Morphology of Plasma Electrolytic Oxidation Coatings
- 1.
SYSNO ASEP 0465628 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title X-ray Computed Tomographic Investigation of the Porosity and Morphology of Plasma Electrolytic Oxidation Coatings Author(s) Zhang, X. (GB)
Aliasghari, S. (GB)
Němcová, A. (GB)
Burnett, T.L. (GB)
Kuběna, Ivo (UFM-A) RID, ORCID
Šmíd, Miroslav (UFM-A) RID, ORCID
Thompson, G. (GB)
Skeldon, P. (GB)
Withers, P.J. (GB)Number of authors 9 Source Title ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 8, č. 13 (2016), s. 8801-8810Number of pages 10 s. Language eng - English Country US - United States Keywords plasma electrolytic oxidation ; porosity ; scanning electron microscopy ; titanium ; X-ray computed tomography Subject RIV JK - Corrosion ; Surface Treatment of Materials R&D Projects ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000373748200058 EID SCOPUS 84964522879 DOI 10.1021/acsami.6b00274 Annotation Plasma electrolytic oxidation (PEO) is of increasing interest for the formation of ceramic coatings on metals for applications that require diverse coating properties, such as wear and corrosion resistance, low thermal conductivity, and biocompatibility. Porosity in the coatings can have an important impact on the coating performance. However, the quantification of the porosity in coatings can be difficult due to the wide range of pore sizes and the complexity of the coating morphology. In this work, a PEO coating formed on titanium is examined using high resolution X-ray computed tomography (X-ray CT). The observations are validated by comparisons of surface views and cross-sectional views of specific coating features obtained using X-ray CT and scanning electron microscopy. The X-ray CT technique is shown to be capable of resolving pores with volumes of at least 6 μm3. Furthermore, the shapes of large pores are revealed and a correlation is demonstrated between the locations of the pores, nodules on the coating surface, and depressions in the titanium substrate. The locations and morphologies of the pores, which constitute 5.7% of the coating volume, indicate that they are generated by release of oxygen gas from the molten coating. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2017
Number of the records: 1