Dense yttria-stabilised zirconia electrolyte layers for SOFC by reactive magnetron sputtering

Nédélec, R.; Uhlenbruck, Sven; Sebold, Doris; Haanappel, V.A.C.; Buchkremer, Hans Peter; Stöver, D.

doi:10.1016/j.jpowsour.2012.01.054

Cited by 66 publications

(49 citation statements)

References 10 publications

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“…The observed fine grained, homogenous microstructure and poor adhesion may be due to the energetic ion bombardment which both strongly disturbs the nucleation and growth process and induces high stresses. Similar microstructure of YSZ has previously been reported in films prepared by pulsed DCMS at high substrate bias voltage [20]. Comparing crosssectional and surface SEM micrographs of the films deposited by HiPIMS ( Fig.…”

Section: Accepted M Manuscriptsupporting

confidence: 84%

“…3.b-d). It has previously been shown that a columnar structure has a negative effect on the gas-tightness of the YSZ layers [20] and thereby also on the performance of the SOFC. Figure 4 shows SEM images of film surfaces of the YSZ films deposited by pulsed DCMS on NiO-YSZ substrates.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…This lack of performance is related to leaks in the electrolyte due to the columnar morphology. In contrast, Nédélec et al have deposited electrolytes without visible continuous columnar structure and has achieved significant improved electrochemical performance at low temperatures [20].…”

Section: Introductionmentioning

confidence: 99%

“…Films are also synthesized by pulsed direct current magnetron sputtering (DCMS), for reference. As previous studies have shown that the substrate bias is a crucial parameter in order to obtain dense films suitable for SOFC application [20], the bias voltage has been varied between depositions. Coatings are deposited on both Si and NiO-YSZ anodes for SOFC applications and the morphological and structural features of the films are investigated.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Deposition of yttria-stabilized zirconia thin films by high power impulse magnetron sputtering and pulsed magnetron sputtering

Sønderby

Aijaz

Helmersson

et al. 2014

Surface and Coatings Technology

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Yttria-stabilized zirconia (YSZ) thin films were reactively sputter-deposited by high power impulse magnetron sputtering (HiPIMS) and pulsed direct current magnetron sputtering (DCMS). The use of substrate bias voltage was studied in both modes of deposition as a process parameter to promote the growth of dense and less columnar films. Films were deposited on both Si(100) and NiO-YSZ fuel cell anodes. The texture, morphology and composition of the deposited films were investigated with regard to their application as thin electrolytes for solid oxide fuel cells (SOFCs). Independent of the deposition mode the films were found to be stoichiometric. The application of substrate bias voltage had opposite effects on texture and crystallinity of films deposited by pulsed DCMS and HiPIMS. Films deposited by pulsed DCMS became highly crystalline and <220> textured at high bias voltage whereas bias applied to HiPIMS deposited films disrupted crystal growth leading to deterioration of crystallinity. Comparing film morphology, it was found that pulsed DCMS films were columnar and contained voids regardless of the applied substrate bias. When depositing by HiPIMS a window of operation at a bias voltage of -25 V to -50 V was found in which it is possible to deposit non-columnar thin films without voids and cracks as desired for SOFC applications.

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Section: Accepted M Manuscriptsupporting

confidence: 84%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Deposition of yttria-stabilized zirconia thin films by high power impulse magnetron sputtering and pulsed magnetron sputtering

Sønderby

Aijaz

Helmersson

et al. 2014

Surface and Coatings Technology

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“…1, 2 However, the high working temperatures of SOFCs have so far prevented their widespread use. Standard zirconia electrolytes for SOFCs operate at 600 • C-800 • C. 3 This means expensive heat-proof components are required, and it also increases the number of breakdowns and failures from repetitive start-stop processes causing large temperature differences. 4,5 Doped ceria (CeO 2 ) is a promising electrolyte material for SOFCs with low working temperatures (500 • C-650 • C).…”

Section: Introductionmentioning

confidence: 99%

Communication: Different behavior of Young's modulus and fracture strength of CeO2: Density functional theory calculations

Sakanoi

Shimazaki

et al. 2014

The Journal of Chemical Physics

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In this Communication, we use density functional theory (DFT) to examine the fracture properties of ceria (CeO 2 ), which is a promising electrolyte material for lowering the working temperature of solid oxide fuel cells. We estimate the stress-strain curve by fitting the energy density calculated by DFT. The calculated Young's modulus of 221.8 GPa is of the same order as the experimental value, whereas the fracture strength of 22.7 GPa is two orders of magnitude larger than the experimental value. Next, we combine DFT and Griffith theory to estimate the fracture strength as a function of a crack length. This method produces an estimated fracture strength of 0.467 GPa, which is of the same order as the experimental value. Therefore, the fracture strength is very sensitive to the crack length, whereas the Young's modulus is not.

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Tuning the Microstructure and Thickness of Ceramic Layers with Advanced Coating Technologies Using Zirconia as an Example

et al. 2020

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Dense yttria-stabilised zirconia electrolyte layers for SOFC by reactive magnetron sputtering

Cited by 66 publications

References 10 publications

Deposition of yttria-stabilized zirconia thin films by high power impulse magnetron sputtering and pulsed magnetron sputtering

Deposition of yttria-stabilized zirconia thin films by high power impulse magnetron sputtering and pulsed magnetron sputtering

Communication: Different behavior of Young's modulus and fracture strength of CeO2: Density functional theory calculations

Tuning the Microstructure and Thickness of Ceramic Layers with Advanced Coating Technologies Using Zirconia as an Example

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