High temperature wettability between CMAS and YSZ coating with tailored surface microstructures

Kang, Y.X.; Bai, Yu; Du, Guangqing; Yu, Fangli; Bao, Chonggao; Wang, Y.T.; Ding, Fei

doi:10.1016/j.matlet.2018.06.066

Cited by 36 publications

(20 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental data available in the literature is very limited. Only recently [29] researchers have investigated the wetting behavior of CMAS over Yttria-stabilized zirconia (YSZ) ceramic coatings through a sessile drop experiment. The study was conducted using argon gas as the inert medium and reported the temporal evolution of contact angle for the CMAS-YSZ.…”

Section: Materials Wettability Analysismentioning

confidence: 99%

See 1 more Smart Citation

Physical aspects of CMAS particle dynamics and deposition in turboshaft engines

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Materials Wettability Analysismentioning

confidence: 99%

“…Steady-state solution of molten CMAS sessile droplet over YSZ coating at 1275°C obtained from the experiment by Kang et al[29] (a) and from SPH simulation (b).…”

mentioning

confidence: 99%

Physical aspects of CMAS particle dynamics and deposition in turboshaft engines

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As a new generation of thermal barrier coating candidate materials, rare-earth zirconates (such as Sm 2 Zr 2 O 7 ) not only have low thermal conductivity, appropriate thermal expansion coe cients and high thermal stability but also have better CMAS resistance properties than 7YSZ. The results studied by Krause show that rare earth zirconates can resist CMAS erosion in the early stage of the reaction [4,5,6] . Therefore, the reactions of rare-earth zirconates and CMAS have been studied extensively.…”

Section: Introductionmentioning

confidence: 99%

Reaction products of Sm2Zr2O7 with calcium-magnesium- aluminum-silicate (CMAS) and their evolution

Wang

Liu

et al. 2021

Preprint

View full text Add to dashboard Cite

During flight, many silicates (sand, dust, debris, fly ash, etc.) are ingested by an engine. They melt at high operating temperatures on the surface of Thermal barrier coatings (TBCs) to form calcium-magnesium-aluminum-silicate (CMAS) amorphous settling. CMAS erodes TBCs and causes many problems, such as composition segregation, degradation, cracking, and disbanding. As a new generation of TBC candidate materials, rare-earth zirconates (Sm2Zr2O7) have good CMAS resistance properties. The reaction products of Sm2Zr2O7 and CMAS and their subsequent changes were studied by the reaction of Sm2Zr2O7 and excess CMAS at 1350°C. After 1 h of reaction, Sm2Zr2O7 powders were not completely eroded. The reaction products were Sm-apatite and c-ZrO2 solutions. After 4 h of reaction, all Sm2Zr2O7 powders were completely eroded. After 24 h of reaction, Sm-apatite disappeared, and the c-ZrO2 solution remained.

show abstract

“…These phases induce melting point depressions that act as a barrier to any further reaction/infiltration. In addition, the surface of the TBCs can be modified to minimize the wetting of the molten CMAS phase in contact with the TBC outer surface [12,13]. The resulting capillary forces prevent the infiltration of CMAS at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…The resulting capillary forces prevent the infiltration of CMAS at elevated temperatures. This could be achieved by selecting a material whose intrinsic property satisfies this requirement (e.g., SiO 2 , MoSi 2 , AlN, BN, and ZrSiO 4 ) [12] or by producing textured YSZ surfaces by laser glazing to create hydrophobic surfaces [13,14].…”

Section: Introductionmentioning

confidence: 99%