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学者姓名:李长久

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< Page ,Total 39 >
Improving Erosion Resistance of Plasma-Sprayed Ceramic Coatings by Elevating the Deposition Temperature Based on the Critical Bonding Temperature EI SCIE Scopus
期刊论文 | 2018 , 27 (1-2) , 25-34 | JOURNAL OF THERMAL SPRAY TECHNOLOGY
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Abstract :

Interlamellar bonding within plasma-sprayed coatings is one of the most important factors dominating the properties and performance of coatings. The interface bonding between lamellae significantly influences the erosion behavior of plasma-sprayed ceramic coatings. In this study, TiO2 and Al2O3 coatings with different microstructures were deposited at different deposition temperatures based on the critical bonding temperature concept. The erosion behavior of ceramic coatings was investigated. It was revealed that the coatings prepared at room temperature exhibit a typical lamellar structure with numerous unbonded interfaces, whereas the coatings deposited at the temperature above the critical bonding temperature present a dense structure with well-bonded interfaces. The erosion rate decreases sharply with the improvement of interlamellar bonding when the deposition temperature increases to the critical bonding temperature. In addition, the erosion mechanisms of ceramic coatings were examined. The unbonded interfaces in the conventional coatings act as pre-cracks accelerating the erosion of coatings. Thus, controlling interlamellar bonding formation based on the critical bonding temperature is an effective approach to improve the erosion resistance of plasma-sprayed ceramic coatings.

Keyword :

ceramic coating critical bonding temperature interlamellar bonding erosion resistance plasma spray

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GB/T 7714 Yao, Shu-Wei , Yang, Guan-Jun , Li, Cheng-Xin et al. Improving Erosion Resistance of Plasma-Sprayed Ceramic Coatings by Elevating the Deposition Temperature Based on the Critical Bonding Temperature [J]. | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2018 , 27 (1-2) : 25-34 .
MLA Yao, Shu-Wei et al. "Improving Erosion Resistance of Plasma-Sprayed Ceramic Coatings by Elevating the Deposition Temperature Based on the Critical Bonding Temperature" . | JOURNAL OF THERMAL SPRAY TECHNOLOGY 27 . 1-2 (2018) : 25-34 .
APA Yao, Shu-Wei , Yang, Guan-Jun , Li, Cheng-Xin , Li, Chang-Jiu . Improving Erosion Resistance of Plasma-Sprayed Ceramic Coatings by Elevating the Deposition Temperature Based on the Critical Bonding Temperature . | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2018 , 27 (1-2) , 25-34 .
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Effect of Oxidation on the Bonding Formation of Plasma-Sprayed Stainless Steel Splats onto Stainless Steel Substrate EI CPCI-S SCIE Scopus
会议论文 | 2017 , 26 (1-2) , 47-59 | International Thermal Spray Conference (ISTC) | IF: 1.949
WoS CC Cited Count: 4
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Abstract :

Stainless steel splats were deposited on 304 stainless substrates with different thicknesses of oxide layer to examine the effect of substrate oxidation on splat morphology and splat-substrate interface bonding by inert low-pressure plasma spraying. The cross sections of splats showing the splat-substrate interface were prepared by focus ion beam (FIB). The splat morphology and splat-substrate interface bonding state were characterized by scanning electron microscopy. The interface bonding was also examined by an electrolytic etching process. Results showed that with increasing oxide layer thickness and surface roughness, the morphology of splat changed from disk shape to splashed finger-like shape. The examination into the interface bonding by using FIB-prepared cross-sectional samples revealed that the splat interface bonding depended on the oxide roughness and composition. The interface bonding with a ratio of 44% was formed at the inner part of a splat on the pre-oxidized substrate when iron oxide presented on the surface, and the roughness of oxide scale was < 5 nm. When the pre-oxidizing temperature exceeded 800 A degrees C, the surface roughness increased to 14 nm and chromium oxide covered the pre-oxidized surface, resulting in no effective bonding forming at the whole interface. Thus, surface roughness and oxide composition have a significant influence on the splat interface bonding formation.

Keyword :

thermal spray splat morphology oxide layer substrate temperature interface bonding formation

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GB/T 7714 Wang, Jun , Li, Chang-Jiu , Yang, Guan-Jun et al. Effect of Oxidation on the Bonding Formation of Plasma-Sprayed Stainless Steel Splats onto Stainless Steel Substrate [C] . 2017 : 47-59 .
MLA Wang, Jun et al. "Effect of Oxidation on the Bonding Formation of Plasma-Sprayed Stainless Steel Splats onto Stainless Steel Substrate" . (2017) : 47-59 .
APA Wang, Jun , Li, Chang-Jiu , Yang, Guan-Jun , Li, Cheng-Xin . Effect of Oxidation on the Bonding Formation of Plasma-Sprayed Stainless Steel Splats onto Stainless Steel Substrate . (2017) : 47-59 .
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Effect of Fe doping on the performance of suspension plasma-sprayed PrBa0.5Sr0.5Co2-xFexO5+delta cathodes for intermediate-temperature solid oxide fuel cells EI SCIE Scopus
期刊论文 | 2017 , 43 (15) , 11648-11655 | CERAMICS INTERNATIONAL | IF: 3.057
WoS CC Cited Count: 2
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Abstract :

PrBa0.5Sr0.5Co2-xFexO5+delta (PBSCF) (X = 0, 0.3, 0.4, and 0.5) is investigated as cathode material for intermediate temperature solid oxide fuel cells. Suspension plasma spraying is used as a low cost and large-scale manufacturing process to prepare PBSCF cathodes. Fe substitution effects on the crystal structure and electrochemical performance are characterized. All plasma-sprayed PBSCF cathodes exhibit a pure and stable cubic structure. The suspension plasma-sprayed PBSCF deposits show a porous and fine structure, and the microstructures are insensitive to Fe substitution. Subsequent to Fe doping, the polarization resistance of PBSCF cathodes rapidly decreases for increasing Fe substitution concentration from 0 to 0.4. Further increase of the Fe doping concentration increases the cathode polarization instead. At 600 and 700 degrees C, a 20% Fe-doped (x = 0.4) PBSCF cathode exhibits remarkably low area-specific polarization resistances (R-p) of 0.074 Omega cm(2) and 0.012 Omega cm(2), respectively. Moreover, the Rp of all cathodes remains almost identical after isothermal annealing at 600 degrees C for 300 h. Furthermore, the thermally-sprayed porous metal-supported cell assembled with the optimal PBSCF cathode shows excellent performance with peak power densities of 0.37, 0.8, and 1.35 W cm(-2) at 500, 600, and 700 degrees C, respectively.

Keyword :

Suspension plasma spraying Solid oxide fuel cells Double-perovskite cathode Fe-doping Electrochemical performance

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GB/T 7714 Zhang, Shan-Lin , Chen, Kuan , Zhang, Ai-Ping et al. Effect of Fe doping on the performance of suspension plasma-sprayed PrBa0.5Sr0.5Co2-xFexO5+delta cathodes for intermediate-temperature solid oxide fuel cells [J]. | CERAMICS INTERNATIONAL , 2017 , 43 (15) : 11648-11655 .
MLA Zhang, Shan-Lin et al. "Effect of Fe doping on the performance of suspension plasma-sprayed PrBa0.5Sr0.5Co2-xFexO5+delta cathodes for intermediate-temperature solid oxide fuel cells" . | CERAMICS INTERNATIONAL 43 . 15 (2017) : 11648-11655 .
APA Zhang, Shan-Lin , Chen, Kuan , Zhang, Ai-Ping , Li, Cheng-Xin , Li, Chang-Jiu . Effect of Fe doping on the performance of suspension plasma-sprayed PrBa0.5Sr0.5Co2-xFexO5+delta cathodes for intermediate-temperature solid oxide fuel cells . | CERAMICS INTERNATIONAL , 2017 , 43 (15) , 11648-11655 .
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Strain-induced multiscale structural changes in lamellar thermal barrier coatings EI SCIE Scopus
期刊论文 | 2017 , 43 (2) , 2252-2266 | CERAMICS INTERNATIONAL | IF: 3.057
WoS CC Cited Count: 9
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Abstract :

The thermal mismatch stress, as well as residual stress, in coating/substrate systems often leads to structural changes and subsequent coating debonding in the systems. This study focused on the changes induced in the microstructure and properties of lamellar yttria-stabilized zirconia coatings upon heating, with the aim of elucidating their starting microstructure prior to sintering. The results showed that the combined effect of the residual stress and the thermal mismatch stress results in scale-sensitive changes in the properties of the coatings. The macroscale properties changed significantly, while the microscale properties changed only slightly. Structural characterization revealed that a certain degree of expansion at the tips of both the intersplat pores and the intrasplat cracks occurs, contributing to the microscale structural changes observed in most regions. Moreover, a few mesoscale cracks covering several layers were also observed. A lamellar structural model was developed to correlate the multiscale structural changes observed with those in the properties. Finally, this study revealed that the actual starting structure of plasma-sprayed thermal barrier coatings prior to sintering is different from that in the as-deposited state. This should aid in obtaining an in-depth understanding on the microstructural and properties evolution of the constrained coatings under actual service conditions.

Keyword :

Plasma spraying Mechanical properties Thermal barrier coatings CTE mismatch strain Multiscale structural changes

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GB/T 7714 Li, Guang-Rong , Yang, Guan-Jun , Li, Cheng-Xin et al. Strain-induced multiscale structural changes in lamellar thermal barrier coatings [J]. | CERAMICS INTERNATIONAL , 2017 , 43 (2) : 2252-2266 .
MLA Li, Guang-Rong et al. "Strain-induced multiscale structural changes in lamellar thermal barrier coatings" . | CERAMICS INTERNATIONAL 43 . 2 (2017) : 2252-2266 .
APA Li, Guang-Rong , Yang, Guan-Jun , Li, Cheng-Xin , Li, Chang-Jiu . Strain-induced multiscale structural changes in lamellar thermal barrier coatings . | CERAMICS INTERNATIONAL , 2017 , 43 (2) , 2252-2266 .
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Thermally Sprayed Large Tubular Solid Oxide Fuel Cells and Its Stack: Geometry Optimization, Preparation, and Performance EI SCIE Scopus
期刊论文 | 2017 , 26 (3) , 441-455 | JOURNAL OF THERMAL SPRAY TECHNOLOGY | IF: 1.949
WoS CC Cited Count: 3
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Abstract :

In this study, we develop a large tubular solid oxide fuel cells design with several cells in series on a porous cermet support, which has many characteristics such as self-sealing, low Ohmic loss, high strength, and good thermal expansion coefficient matching. Here, we investigate aspects of the cell design, manufacture, performance, and application. Firstly, the cell length and number of cells in series are optimized by theoretical analysis. Then, thermal spraying is applied as a cost-effective method to prepare all the cell components. Finally, the performance of different types of cells and two types of stacks is characterized. The maximum output power of one tube, which had 20 cells in series, reaches 31 and 40.5 W at 800 and 900 A degrees C, respectively. Moreover, the output power of a stack assembled with 56 tubes, each with ten cells in series, reaches 800 W at 830 A degrees C. The excellent single tube and cell stack performance suggest that thermally sprayed tubular SOFCs have significant potential for commercialized application.

Keyword :

performance thermal spraying stack tubular solid oxide fuel cells

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GB/T 7714 Zhang, Shan-Lin , Li, Cheng-Xin , Liu, Shuai et al. Thermally Sprayed Large Tubular Solid Oxide Fuel Cells and Its Stack: Geometry Optimization, Preparation, and Performance [J]. | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2017 , 26 (3) : 441-455 .
MLA Zhang, Shan-Lin et al. "Thermally Sprayed Large Tubular Solid Oxide Fuel Cells and Its Stack: Geometry Optimization, Preparation, and Performance" . | JOURNAL OF THERMAL SPRAY TECHNOLOGY 26 . 3 (2017) : 441-455 .
APA Zhang, Shan-Lin , Li, Cheng-Xin , Liu, Shuai , Li, Chang-Jiu , Yang, Guan-Jun , He, Peng-Jiang et al. Thermally Sprayed Large Tubular Solid Oxide Fuel Cells and Its Stack: Geometry Optimization, Preparation, and Performance . | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2017 , 26 (3) , 441-455 .
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Room-temperature nitrogen-dioxide sensors based on ZnO1-x coatings deposited by solution precursor plasma spray EI SCIE Scopus
期刊论文 | 2017 , 242 , 102-111 | SENSORS AND ACTUATORS B-CHEMICAL | IF: 5.667
WoS CC Cited Count: 10
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Abstract :

The stoichiometric ZnO has a bandgap greater than 2.6 eV and has no or weak response to visible light, which greatly suppresses its applications. We report here that a process of solution precursor plasma spray (SPPS) can effectively narrow the bandgap and extend the absorption of ZnO to visible light region, which mainly results from highly concentrated oxygen vacancies generated during SPPS process. By photoluminescence spectroscopy, electron paramagnetic resonance and X-ray photoelectron spectroscopy, we found that a large number of oxygen vacancies were implanted into ZnO1-x, prepared by SPPS. The generation of highly concentrated oxygen vacancies were mainly attributed to reducing atmosphere as well as fast heating and cooling process inherently provided by SPPS. The findings of this work create a new way for developing narrow bandgap ZnO1-x,. We present that the SPPS ZnO1-x coatings can be utilized directly as sensitive materials under visible -light illumination. The oxygen vacancies have considerable influence on its optical and electrical properties. The ZnO1-x coatings exhibited an obvious absorption covering the whole visible -light region and its bandgap was calculated to be 2.15 eV which was much narrower than that of stoichiometric ZnO (3.37 eV). The sensors based on ZnO1-x coatings showed significant responses to NO2 at room temperature. In addition, the sensor response increased linearly with NO2 concentration. The enhanced sensor properties were attributed to the rich oxygen vacancies and special coating microstructure provided by SPPS. (C) 2016 Elsevier B.V. All rights reserved.

Keyword :

Gas sensors Solution precursor plasma spray Porous nanostructure ZnO Oxygen vacancy

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GB/T 7714 Zhang, Chao , Geng, Xin , Liao, Hanlin et al. Room-temperature nitrogen-dioxide sensors based on ZnO1-x coatings deposited by solution precursor plasma spray [J]. | SENSORS AND ACTUATORS B-CHEMICAL , 2017 , 242 : 102-111 .
MLA Zhang, Chao et al. "Room-temperature nitrogen-dioxide sensors based on ZnO1-x coatings deposited by solution precursor plasma spray" . | SENSORS AND ACTUATORS B-CHEMICAL 242 (2017) : 102-111 .
APA Zhang, Chao , Geng, Xin , Liao, Hanlin , Li, Chang-Jiu , Debliquy, Marc . Room-temperature nitrogen-dioxide sensors based on ZnO1-x coatings deposited by solution precursor plasma spray . | SENSORS AND ACTUATORS B-CHEMICAL , 2017 , 242 , 102-111 .
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Large-area high-efficiency perovskite solar cells based on perovskite films dried by the multi-flow air knife method in air EI SCIE Scopus
期刊论文 | 2017 , 5 (4) , 1548-1557 | JOURNAL OF MATERIALS CHEMISTRY A | IF: 9.931
WoS CC Cited Count: 23
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Abstract :

Perovskite solar cells are extremely promising high-efficiency low-cost photovoltaic devices. However, large-area and uniform perovskite film fabrication in air is still a big challenge for the mass production of highly efficient perovskite solar cells. Here, we first report the novel multi-flow air knife (MAK) method to control the formation of large-area perovskite films in ambient air. The proposed MAK method, based on the comprehensive understanding of the solution film evaporation process, entails the use of multiple gas flows that rapidly dry the solution and enable the production of large-area perovskite films in air. By adopting the MAK technology, high-quality films with full surface coverage and a low surface roughness of 4.98 nm over a 10 x 10 mu m(2) scan area were successfully fabricated. Highly reproducible power conversion efficiencies up to 11.70% were achieved with an active area of 1.0 cm(2). The highest efficiency of 17.71%, obtained for a device with an area of 0.1 cm(2), further demonstrated the promising potential of this technology. Thus, the MAK technology enables the low-cost fabrication of highly efficient perovskite solar cells, paving the way for the mass production of low-cost high-performance perovskite solar cells in ambient air.

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GB/T 7714 Gao, Li-Li , Li, Cheng-Xin , Li, Chang-Jiu et al. Large-area high-efficiency perovskite solar cells based on perovskite films dried by the multi-flow air knife method in air [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2017 , 5 (4) : 1548-1557 .
MLA Gao, Li-Li et al. "Large-area high-efficiency perovskite solar cells based on perovskite films dried by the multi-flow air knife method in air" . | JOURNAL OF MATERIALS CHEMISTRY A 5 . 4 (2017) : 1548-1557 .
APA Gao, Li-Li , Li, Cheng-Xin , Li, Chang-Jiu , Yang, Guan-Jun . Large-area high-efficiency perovskite solar cells based on perovskite films dried by the multi-flow air knife method in air . | JOURNAL OF MATERIALS CHEMISTRY A , 2017 , 5 (4) , 1548-1557 .
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The 2016 Thermal Spray Roadmap (vol 25, pg 1376, 2016) EI SCIE Scopus
期刊论文 | 2017 , 26 (5) , 985-986 | JOURNAL OF THERMAL SPRAY TECHNOLOGY | IF: 1.949
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GB/T 7714 Vardelle, Armelle , Moreau, Christian , Akedo, Jun et al. The 2016 Thermal Spray Roadmap (vol 25, pg 1376, 2016) [J]. | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2017 , 26 (5) : 985-986 .
MLA Vardelle, Armelle et al. "The 2016 Thermal Spray Roadmap (vol 25, pg 1376, 2016)" . | JOURNAL OF THERMAL SPRAY TECHNOLOGY 26 . 5 (2017) : 985-986 .
APA Vardelle, Armelle , Moreau, Christian , Akedo, Jun , Ashrafizadeh, Hossein , Berndt, Christopher C. , Berghaus, Jorg Oberste et al. The 2016 Thermal Spray Roadmap (vol 25, pg 1376, 2016) . | JOURNAL OF THERMAL SPRAY TECHNOLOGY , 2017 , 26 (5) , 985-986 .
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Novel Approaches to Prepare High Performance Dense Electrolyte and Interconnect Applicable to SOFC by Atmospheric Plasma Spraying EI CPCI-S Scopus
会议论文 | 2017 , 78 (1) , 1831-1838 | 15th International Symposium on Solid Oxide Fuel Cells (SOFC)
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Plasma spraying is considered a promising cost-effective manufacturing process to deposit electrolyte and ceramic interconnect for solid oxide fuel cells. However, it is generally difficult to deposit highly dense electrolyte and interconnect with desirable compositions for multiple components ceramics following the conventional process routine. In this paper, a novel approach based on the critical bonding temperature concept is presented to prepare dense electrolytes by plasma spraying. The spray particle size was utilized to control preferential element evaporation and subsequent composition of spray deposits. YSZ and LSGM are used as typical electrolytes. It is revealed that both plasma-sprayed electrolytes and interconnects present a gas permeability less than 1x10(-)(7) cm(-4) gf(-1)s(-1) and can be directly applied to SOFC high temperature operation. Moreover, the deposited electrolytes present an ionic conductivity of over 80% sintered bulk materials which can be used to assemble SOFC with excellent performance.

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GB/T 7714 Li, Chang-Jiu , Chen, Xu , Zhang, Shan-Lin et al. Novel Approaches to Prepare High Performance Dense Electrolyte and Interconnect Applicable to SOFC by Atmospheric Plasma Spraying [C] . 2017 : 1831-1838 .
MLA Li, Chang-Jiu et al. "Novel Approaches to Prepare High Performance Dense Electrolyte and Interconnect Applicable to SOFC by Atmospheric Plasma Spraying" . (2017) : 1831-1838 .
APA Li, Chang-Jiu , Chen, Xu , Zhang, Shan-Lin , Li, Cheng-Xin , Yang, Guan-Jun . Novel Approaches to Prepare High Performance Dense Electrolyte and Interconnect Applicable to SOFC by Atmospheric Plasma Spraying . (2017) : 1831-1838 .
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Effect of Deposition Temperature on the Microstructure and Performance of Vacuum Cold Sprayed Nano-structured LSCF Cathodes for Solid Oxide Fuel Cells EI CPCI-S Scopus
会议论文 | 2017 , 78 (1) , 765-772 | 15th International Symposium on Solid Oxide Fuel Cells (SOFC)
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Here, we investigate the feasibility of using vacuum cold spray process for the cost effective fabrication of a nano-structured La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) as a high-performance cathode for solid oxide fuel cells (SOFCs). The results indicate that the deposition temperature shows significant influence on the microstructure. When the cathode was deposited at room temperature, there were many unbonded interfaces between the electrolyte and cathode, and inside the cathode. At a deposition temperature of 300 degrees C, it can be found that the cathode and electrolyte were bonded well and the cathode showed the lowest polarization resistance (0.5 Omega.cm(2) at 600 degrees C). However, with the further increase of deposition temperature, a dense microstructure was obtained and resulted in a polarization resistance increase. Our results suggest that vacuum cold spray has potential to be a low-cost and flexible process suitable for the fabrication of nanostructured cathodes for SOFCs.

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GB/T 7714 Zhang, Shan-Lin , Shang, Yuan-Bo , Li, Cheng-Xin et al. Effect of Deposition Temperature on the Microstructure and Performance of Vacuum Cold Sprayed Nano-structured LSCF Cathodes for Solid Oxide Fuel Cells [C] . 2017 : 765-772 .
MLA Zhang, Shan-Lin et al. "Effect of Deposition Temperature on the Microstructure and Performance of Vacuum Cold Sprayed Nano-structured LSCF Cathodes for Solid Oxide Fuel Cells" . (2017) : 765-772 .
APA Zhang, Shan-Lin , Shang, Yuan-Bo , Li, Cheng-Xin , Li, Chang-Jiu . Effect of Deposition Temperature on the Microstructure and Performance of Vacuum Cold Sprayed Nano-structured LSCF Cathodes for Solid Oxide Fuel Cells . (2017) : 765-772 .
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