Advanced thermal harrier coatings （TBCs） with better thermal barrier performance are required by both advanced gas turbine and air engine. In this work, novel bimodal TBCs with low thermal conductivity were deposite...Advanced thermal harrier coatings （TBCs） with better thermal barrier performance are required by both advanced gas turbine and air engine. In this work, novel bimodal TBCs with low thermal conductivity were deposited and characterized by a novel co-spray approach with both solid powder and suspension. Experimental and finite element analyses were used to optimize the process parameters to prepare the specific morphology nanostructure features. With a comprehensive understanding on the influence of spraying parameters on the morphology ofnano-particles, homogeneous nano-particle heaps with a large aspect ratio were introduced to conventional layered coatings by plasma co-spraying with suspension and solid powder. Co-sprayed bimodal microstructure composite coatings resulted from both wet suspension droplets and molten particle droplets exhibited low thermal conductivity. The thermal conductivity of the composite coating was 1/5 lower than that of the counterpart coatings by conventional plasma spraying with solid powder. This study sheds light to the structural tailoring towards the advanced TBCs with low thermal conductivity.展开更多
This study aimed to compare and analyze the effects of different modifiers on the structure,free surface energy parameters,and direct compaction properties of composite particles(CPs)prepared by co-spray drying and to...This study aimed to compare and analyze the effects of different modifiers on the structure,free surface energy parameters,and direct compaction properties of composite particles(CPs)prepared by co-spray drying and to explore the correlation among structure,free surface energy parameters,and direct compaction properties of CPs.CPs with Puerariae lobatae radix were prepared by adding different modifiers.The structure,free surface energy parameters,and direct compaction properties of cPs were characterized.Furthermore,Pearson correlation analysis and artificial neural network methods were used to evaluate the correlation among structure,free surface energy parameters,and direct compaction properties of CPs.The results showed that different modifiers exhibited variegated effects on the structure,free surface energy parameters,and direct compaction properties of cPs.Pearson correlation analysis showed that the particle size distribution,uniformity,and brightness were positively correlated with polar components and polarity index,with statistical significance(P<0.01).The polar components and polarity index were positively correlated with flowability and disintegration time,and negatively correlated with compactibility,with statistical significance(P<0.o1).Overall,these findings contribute to better establishing a theoretical model among structure,free surface energy parameters,and direct compaction properties of Ps and provide a theoretical basis for predicting material properties.展开更多
基金supported by the National Basic Research Program of China(No.2013CB035701)the Fundamental Research Funds for the Central Universitiesthe National Program for Support of Top-notch Young Professionals
文摘Advanced thermal harrier coatings （TBCs） with better thermal barrier performance are required by both advanced gas turbine and air engine. In this work, novel bimodal TBCs with low thermal conductivity were deposited and characterized by a novel co-spray approach with both solid powder and suspension. Experimental and finite element analyses were used to optimize the process parameters to prepare the specific morphology nanostructure features. With a comprehensive understanding on the influence of spraying parameters on the morphology ofnano-particles, homogeneous nano-particle heaps with a large aspect ratio were introduced to conventional layered coatings by plasma co-spraying with suspension and solid powder. Co-sprayed bimodal microstructure composite coatings resulted from both wet suspension droplets and molten particle droplets exhibited low thermal conductivity. The thermal conductivity of the composite coating was 1/5 lower than that of the counterpart coatings by conventional plasma spraying with solid powder. This study sheds light to the structural tailoring towards the advanced TBCs with low thermal conductivity.
基金the National Natural Science Foundation of China(grant Nos.82360777 and 82003953)National Natural Science Foundation of Jiangxi Province(grant No.20232ACB216015)+3 种基金GanPo Yang Talent Support Plan(grant No.2025QT07)Jiangxi University of Chinese Medicine Science and Technology Innovation Team Development Program(grant No.CXTD-22004)Doctoral Research start-up Fund Project of Jiangxi University of Chinese Medicine(grant Nos.2021BSZR015 and2022BSzR003)Open fund project of Key Laboratory of Modern Preparation of TCM,Ministry of Education,Jiangxi University of Chinese Medicine(grant No.Zdsys-202302).
文摘This study aimed to compare and analyze the effects of different modifiers on the structure,free surface energy parameters,and direct compaction properties of composite particles(CPs)prepared by co-spray drying and to explore the correlation among structure,free surface energy parameters,and direct compaction properties of CPs.CPs with Puerariae lobatae radix were prepared by adding different modifiers.The structure,free surface energy parameters,and direct compaction properties of cPs were characterized.Furthermore,Pearson correlation analysis and artificial neural network methods were used to evaluate the correlation among structure,free surface energy parameters,and direct compaction properties of CPs.The results showed that different modifiers exhibited variegated effects on the structure,free surface energy parameters,and direct compaction properties of cPs.Pearson correlation analysis showed that the particle size distribution,uniformity,and brightness were positively correlated with polar components and polarity index,with statistical significance(P<0.01).The polar components and polarity index were positively correlated with flowability and disintegration time,and negatively correlated with compactibility,with statistical significance(P<0.o1).Overall,these findings contribute to better establishing a theoretical model among structure,free surface energy parameters,and direct compaction properties of Ps and provide a theoretical basis for predicting material properties.
