Phase stability of zirconia-based thermal barrier coatings part I. Zirconia-yttria alloys

Brandon, J.; Taylor, R. E.

doi:10.1016/0257-8972(91)90151-l

Cited by 172 publications

(65 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The molar fractions of m-ZrO 2 and t-ZrO 2 has been conducted according to Brandon and Taylor[39]. Further increase in the Ta 2 O 5 content decreases the transformability, but even the maximum tantala doping (0.36 vol%) shows a higher transformability of the tĺm ZrO 2 in comparison to undoped samples.…”

mentioning

confidence: 99%

Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Naga

Hassan

Awaad

2015

Ceramics International

View full text Add to dashboard Cite

mentioning

confidence: 99%

Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Naga

Hassan

Awaad

2015

Ceramics International

View full text Add to dashboard Cite

“…However, this material exhibits phase instability at high temperature (>1200°C), leading to volume expansion and increased stresses within the coating. The combination of phase transformation and sintering of the material is one of the failure mechanisms of the thermal barrier coating system (Ref [6][7][8][9]. Engine manufacturers want to increase yield by increasing the inservice temperature to over 1200°C, leading to studies on YSZ substitution.…”

Section: Introductionmentioning

confidence: 99%

La2Zr2O7 (LZ) Coatings by Liquid Feedstock Plasma Spraying: The Role of Precursors

2014

View full text Add to dashboard Cite

Solution precursor plasma spraying (SPPS) is an innovative process for obtaining finely structured coatings from metallic salt solutions. Lanthanum and zirconium precursors were studied to understand their influence on lanthanum zirconate (La 2 Zr 2 O 7 ) synthesis by SPPS. Thermal analysis revealed that the nature of the precursor and the solvent affected mixture decomposition by changing the decomposition temperature. The surface tensions of precursor solutions in various media were investigated and revealed the influence of the nature of the counter-cation. Different solutions of precursor mixtures were used to obtain La 2 Zr 2 O 7 splats on metallic substrates. A decrease in solution surface tension led to an increase in splat size. Coating mechanisms by SPPS are governed by the nature of the precursors and solvents.

show abstract

“…Many investigations have demonstrated that the properties of coating depend on its microstructure ( Ref 7). Thus, in the case of TBCs, its durability depends principally on the coating microstructure as well as on the environmental and service conditions (Ref [8][9][10][11]. Low thermal conductivity (Ref 12) and low electric conductivity (Ref 13) of plasma-sprayed YSZ coatings compared with sintered bulk were yielded due to the limited lamellar interface bonding.…”

Section: Introductionmentioning

confidence: 99%

A TEM Study of the Microstructure of Plasma-Sprayed YSZ Near Inter-splat Interfaces

2015

View full text Add to dashboard Cite

The splat interface bonding state which changes heat transfer conditions and thus the cooling rate during splat cooling may influence the interface microstructure. In this paper, YSZ coating was deposited by atmospheric plasma spraying with substrate cooling during deposition. Subsequent characterization was implemented using high resolution transmission electron microscopy to examine the local microstructures near the interfaces at the bonded and unbonded zones. Selected area diffraction analyses of the splats across both the bonded interface and unbonded interface revealed that all bulk splats present a metastable tetragonal structure. Results showed that the size of columnar grains within a splat was significantly influenced by the interface bonding. At the unbonded region in the splat, large columnar grains form which can be attributed to poor thermal contact of melt to the underlying splat surface before its solidification. At the bonded zones, the splat presents a much fine columnar grain structure, which is attributed to good thermal contact of the melt to the underlying splat before solidification. Moreover, it is evident that the bonded interface region presents a distinct microstructure feature from the fine columnar grains suggesting the crystal defect of high density of dislocations at the interface.

show abstract

Phase stability of zirconia-based thermal barrier coatings part I. Zirconia-yttria alloys

Cited by 172 publications

References 10 publications

Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

La2Zr2O7 (LZ) Coatings by Liquid Feedstock Plasma Spraying: The Role of Precursors

A TEM Study of the Microstructure of Plasma-Sprayed YSZ Near Inter-splat Interfaces

Contact Info

Product

Resources

About