Influence of long time post annealing on thermal stability and thermophysical properties of plasma sprayed La2Zr2O7 coatings

The enhancement of both thermal and mechanical properties of epoxy materials using nanomaterials becomes a target in coating of the steel to protect it from aggressive environmental conditions for a long time, with reducing the cost. In this respect, the adhesion properties of the epoxy with the steel surfaces, and its proper superhyrophobicity to repel the seawater humidity, can be optimized via addition of green nanoparticles (NPs). In-situ modification of silver (Ag) and calcium carbonate (CaCO3) NPs with oleic acid (OA) was carried out during the formation of Ag−OA and CaCO3−OA, respectively. The epoxide oleic acid (EOA) was also used as capping for Ca−O3 NPs by in-situ method and epoxidation of Ag−OA NPs, too. The morphology, thermal stability, and the diameters of NPs, as well as their dispersion in organic solvent, were investigated. The effects of the prepared NPs on the exothermic curing of the epoxy resins in the presence of polyamines, flexibility or rigidity of epoxy coatings, wettability, and coatings durability in aggressive seawater environment were studied. The obtained results confirmed that the proper superhyrophobicity, coating adhesion, and thermal stability of the epoxy were improved after exposure to salt spray fog for 2000 h at 36 °C.

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Increased Thermal Stability of Co-silicide Using Co-Ta Alloy Films

MRS Proceedings ◽

10.1557/proc-670-k6.5 ◽

2001 ◽

Vol 670 ◽

Author(s):

Min-Joo Kim ◽

Hyo-Jick Choi ◽

Dae-Hong Ko ◽

Ja-Hum Ku ◽

Siyoung Choi ◽

...

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Grain Boundary ◽

Reaction Rate ◽

Boundary Migration ◽

Grain Boundary Migration ◽

Alloy Films ◽

Post Annealing ◽

Alloy Process ◽

Thermal Stability Of

ABSTRACTThe silicidation reactions and thermal stability of Co silicide formed from Co-Ta/Si systems have been investigated. In case of Co-Ta alloy process, the formation of low resistive CoSi2phase is delayed to about 660°C, as compared to conventional Co/Si system. Moreover, the presence of Ta in Co-Ta alloy films reduces the silicidation reaction rate, resulting in the strong preferential orientation in CoSi2 films. Upon high temperature post annealing in the furnace, the sheet resistance of Co-silicide formed from Co/Si systems increases significantly, while that of Co-Ta/Si systems maintains low. This is due to the formation of TaSi2 at the grain boundaries and surface of Co-silicide films, which prevents the grain boundary migration thereby slowing the agglomeration. Therefore, from our research, increased thermal stability of Co-silicide films was successfully obtained from Co-Ta alloy process.

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Thermal stability of plasma-sprayed La2Ce2O7/YSZ composite coating

Ceramics International ◽

10.1016/j.ceramint.2016.01.179 ◽

2016 ◽

Vol 42 (7) ◽

pp. 7950-7961 ◽

Cited By ~ 9

Author(s):

Ya-Xin Xu ◽

Tao Liu ◽

Guan-Jun Yang ◽

Chang-Jiu Li

Keyword(s):

Thermal Stability ◽

Composite Coating ◽

Plasma Sprayed ◽

Thermal Stability Of

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Experimental study of thermophysical properties and thermal stability of quaternary nitrate molten salts for thermal energy storage

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2018.10.013 ◽

2019 ◽

Vol 190 ◽

pp. 12-19 ◽

Cited By ~ 15

Author(s):

Lu-lu Zou ◽

Xia Chen ◽

Yu-ting Wu ◽

Xin Wang ◽

Chong-fang Ma

Keyword(s):

Thermal Stability ◽

Experimental Study ◽

Energy Storage ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Thermophysical Properties ◽

Molten Salts ◽

Thermal Stability Of

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The mechanistic implications of the high temperature, long time thermal stability of nanoscale Mn-Ni-Si precipitates in irradiated reactor pressure vessel steels

Scripta Materialia ◽

10.1016/j.scriptamat.2020.02.027 ◽

2020 ◽

Vol 181 ◽

pp. 134-139 ◽

Cited By ~ 3

Author(s):

N. Almirall ◽

P.B. Wells ◽

S. Pal ◽

P.D. Edmondson ◽

T. Yamamoto ◽

...

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Pressure Vessel ◽

Reactor Pressure Vessel ◽

Pressure Vessel Steels ◽

Long Time ◽

Thermal Stability Of ◽

Reactor Pressure

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Thermophysical properties and cyclic lifetime of plasma sprayed SrAl 12 O 19 for thermal barrier coating applications

Journal of the American Ceramic Society ◽

10.1111/jace.17319 ◽

2020 ◽

Vol 103 (10) ◽

pp. 5599-5611 ◽

Cited By ~ 2

Author(s):

Xin Zhou ◽

Wenjia Song ◽

Jieyan Yuan ◽

Qingmei Gong ◽

Hao Zhang ◽

...

Keyword(s):

Thermal Barrier Coating ◽

Thermophysical Properties ◽

Thermal Barrier ◽

Barrier Coating ◽

O 19 ◽

Plasma Sprayed

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Non-equilibrium Microstructure and Thermal Stability of Plasma-sprayed Al–Si Coatings

Journal of Materials Research ◽

10.1557/jmr.2005.0249 ◽

2005 ◽

Vol 20 (8) ◽

pp. 2038-2045 ◽

Cited By ~ 7

Author(s):

K.H. Baik ◽

H.K. Seok ◽

H.S. Kim ◽

P.S. Grant

Keyword(s):

Thermal Stability ◽

Liquid Droplet ◽

Lattice Parameter ◽

Transmission Electron ◽

Microstructural Inhomogeneity ◽

Amorphous Si ◽

Columnar Grain ◽

Plasma Sprayed ◽

Low Pressure Plasma Spraying ◽

Al Matrix

A splat-quenched, thick Al–Si deposit was manufactured by low-pressure plasma spraying (LPPS) and investigated in terms of microstructural inhomogeneity, Si solid solubility in α–Al, formation of metastable phases, and thermal stability. The LPPS Al–Si deposit had an inhomogeneous, layered microstructure consisting of splat-quenched lamellae and the incorporation of unmelted or partially melted particles. The splat-quenched Al–Si lamellae were formed by deposition of a fully liquid droplet and had an almost featureless microstructure at relatively low magnifications. There was a significant reduction in the α–Al lattice parameter in the LPPS Al–Si deposit because of extended Si solubility in the α–Al matrix. Transmission electron microscopy investigations showed that the splat quenching of liquid Al–Si droplet led to (i) columnar grain growth of α–Al(Si), (ii) formation of nano-sized Si precipitates in the Al matrix which was supersaturated with Si; and (iii) formation of amorphous Si phase embedded in the crystalline Al matrix. On reheating, the amorphous Si transformed into fine crystalline Si by interdiffusion of Al and Si atoms. Simultaneously, Si precipitation occurred in the supersaturated α–Al matrix. The overall activation energy for the Si crystallization/precipitation was estimated as ∼81 kJ/mol from a modified Kissinger analysis.

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