The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform

Sheng-kai Gong - One of the best experts on this subject based on the ideXlab platform.

  • thermal shock resistance and mechanical properties of la2ce2o7 thermal barrier coatings with Segmented Structure
    Ceramics International, 2009
    Co-Authors: Yi Wang, Sheng-kai Gong
    Abstract:

    Abstract La2Ce2O7 (LCO) is a promising candidate material for thermal barrier coatings (TBCs) application because of its higher temperature capability and better thermal insulation property relative to yttria stabilized zirconia (YSZ). In this work, La2Ce2O7 TBC with segmentation crack Structure was produced by atmospheric plasma spray (APS). The mechanical properties of the sprayed coatings at room temperature including microhardness, Young's modulus, fracture toughness and tensile strength were evaluated. The Young's modulus and microhardness of the Segmented coating were measured to be about 25 and 5 GPa, relatively higher than those of the non-Segmented coating, respectively. The fracture toughness of the LCO coating is in a range of 1.3–1.5 MPa m1/2, about 40% lower than that of the YSZ coating. The Segmented TBC had a lifetime of more than 700 cycles, improving the lifetime by nearly two times as compared to the non-Segmented TBC. The failure of the Segmented coating occurred by chipping spallation and delamination cracking within the coating.

  • Thermal shock resistance and mechanical properties of La2Ce2O7 thermal barrier coatings with Segmented Structure
    Ceramics International, 2009
    Co-Authors: Yuhuang Wang, Hongbo Guo, Sheng-kai Gong
    Abstract:

    La2Ce2O7 (LCO) is a promising candidate material for thermal barrier coatings (TBCs) application because of its higher temperature capability and better thermal insulation property relative to yttria stabilized zirconia (YSZ). In this work, La2Ce2O7 TBC with segmentation crack Structure was produced by atmospheric plasma spray (APS). The mechanical properties of the sprayed coatings at room temperature including microhardness, Young's modulus, fracture toughness and tensile strength were evaluated. The Young's modulus and microhardness of the Segmented coating were measured to be about 25 and 5 GPa, relatively higher than those of the non-Segmented coating, respectively. The fracture toughness of the LCO coating is in a range of 1.3-1.5 MPa m1/2, about 40% lower than that of the YSZ coating. The Segmented TBC had a lifetime of more than 700 cycles, improving the lifetime by nearly two times as compared to the non-Segmented TBC. The failure of the Segmented coating occurred by chipping spallation and delamination cracking within the coating. ?? 2009 Elsevier Ltd and Techna Group S.r.l.

Yuhuang Wang - One of the best experts on this subject based on the ideXlab platform.

  • mechanical properties of ysz thermal barrier coatings with Segmented Structure
    Surface Engineering, 2012
    Co-Authors: Yuhuang Wang, M X Li
    Abstract:

    Traditional and modified Y2O3 stabilised zirconia (YSZ) thermal barrier coatings (TBCs) on nicked based superalloy DZ125 were produced by atmospheric plasma spray. In addition to the thermal properties, the mechanical properties of ceramics are also very important for superior TBCs. The mechanical properties of the sprayed coatings at room temperature, including microhardness, Young’s modulus, fracture toughness and tensile strength, were evaluated. The Young’s modulus and microhardness of the Segmented coating were measured to be about 72 and 8 GPa, relatively higher than those of the non-Segmented coating respectively. The fracture toughness was determined by an indentation technique. The values of 1·7–2·0 MPa m1/2 for the traditional YSZ coatings are relatively lower than the values for the modified YSZ coatings 2·0–2·3 MPa m1/2. The lower porosity and better lamellar bonding of the Segmented coating could be responsible for the improvement of the mechanical properties.

  • Thermal shock resistance and mechanical properties of La2Ce2O7 thermal barrier coatings with Segmented Structure
    Ceramics International, 2009
    Co-Authors: Yuhuang Wang, Hongbo Guo, Sheng-kai Gong
    Abstract:

    La2Ce2O7 (LCO) is a promising candidate material for thermal barrier coatings (TBCs) application because of its higher temperature capability and better thermal insulation property relative to yttria stabilized zirconia (YSZ). In this work, La2Ce2O7 TBC with segmentation crack Structure was produced by atmospheric plasma spray (APS). The mechanical properties of the sprayed coatings at room temperature including microhardness, Young's modulus, fracture toughness and tensile strength were evaluated. The Young's modulus and microhardness of the Segmented coating were measured to be about 25 and 5 GPa, relatively higher than those of the non-Segmented coating, respectively. The fracture toughness of the LCO coating is in a range of 1.3-1.5 MPa m1/2, about 40% lower than that of the YSZ coating. The Segmented TBC had a lifetime of more than 700 cycles, improving the lifetime by nearly two times as compared to the non-Segmented TBC. The failure of the Segmented coating occurred by chipping spallation and delamination cracking within the coating. ?? 2009 Elsevier Ltd and Techna Group S.r.l.

Yi Wang - One of the best experts on this subject based on the ideXlab platform.

  • thermal shock resistance and mechanical properties of la2ce2o7 thermal barrier coatings with Segmented Structure
    Ceramics International, 2009
    Co-Authors: Yi Wang, Sheng-kai Gong
    Abstract:

    Abstract La2Ce2O7 (LCO) is a promising candidate material for thermal barrier coatings (TBCs) application because of its higher temperature capability and better thermal insulation property relative to yttria stabilized zirconia (YSZ). In this work, La2Ce2O7 TBC with segmentation crack Structure was produced by atmospheric plasma spray (APS). The mechanical properties of the sprayed coatings at room temperature including microhardness, Young's modulus, fracture toughness and tensile strength were evaluated. The Young's modulus and microhardness of the Segmented coating were measured to be about 25 and 5 GPa, relatively higher than those of the non-Segmented coating, respectively. The fracture toughness of the LCO coating is in a range of 1.3–1.5 MPa m1/2, about 40% lower than that of the YSZ coating. The Segmented TBC had a lifetime of more than 700 cycles, improving the lifetime by nearly two times as compared to the non-Segmented TBC. The failure of the Segmented coating occurred by chipping spallation and delamination cracking within the coating.

Hongbo Guo - One of the best experts on this subject based on the ideXlab platform.

  • Thermal shock resistance and mechanical properties of La2Ce2O7 thermal barrier coatings with Segmented Structure
    Ceramics International, 2009
    Co-Authors: Yuhuang Wang, Hongbo Guo, Sheng-kai Gong
    Abstract:

    La2Ce2O7 (LCO) is a promising candidate material for thermal barrier coatings (TBCs) application because of its higher temperature capability and better thermal insulation property relative to yttria stabilized zirconia (YSZ). In this work, La2Ce2O7 TBC with segmentation crack Structure was produced by atmospheric plasma spray (APS). The mechanical properties of the sprayed coatings at room temperature including microhardness, Young's modulus, fracture toughness and tensile strength were evaluated. The Young's modulus and microhardness of the Segmented coating were measured to be about 25 and 5 GPa, relatively higher than those of the non-Segmented coating, respectively. The fracture toughness of the LCO coating is in a range of 1.3-1.5 MPa m1/2, about 40% lower than that of the YSZ coating. The Segmented TBC had a lifetime of more than 700 cycles, improving the lifetime by nearly two times as compared to the non-Segmented TBC. The failure of the Segmented coating occurred by chipping spallation and delamination cracking within the coating. ?? 2009 Elsevier Ltd and Techna Group S.r.l.

Tianyi Li - One of the best experts on this subject based on the ideXlab platform.

  • A Permanent Magnet Brushless Doubly Fed Generator With Segmented Structure
    IEEE Transactions on Magnetics, 2018
    Co-Authors: Yongjiang Jiang, Jianzhong Zhang, Tianyi Li
    Abstract:

    The brushless doubly fed machine (BDFM) has been one of the key topics in the research of wind power generation. To improve the performances of the BDFM, a new permanent magnet (PM) brushless doubly fed generator (BDFG) with complementary Structure is proposed in this paper. Compared with the traditional BDFM, there is an additional PM rotor providing excitation magnetic field for power and control windings. Benefiting from the absence of the exciting current and the excitation loss, the efficiency, and the power density may be increased. In order to solve a series of problems due to the introduction of PM rotor and the field modulation ring, the Segmented Structure is adopted. The improvement schemes are introduced in detail. Finally, the performances of the proposed BDFG are analyzed by the finite-element analysis and the results verify the effectiveness of the proposed methods.

  • A Segmented Brushless Doubly Fed Generator for Wind Power Applications
    IEEE Transactions on Magnetics, 2018
    Co-Authors: Yongjiang Jiang, Jianzhong Zhang, Tianyi Li
    Abstract:

    In this paper, a new brushless doubly fed generator (BDFG) with double stator is proposed. Compared with the traditional BDFG, the winding configurations of the proposed double-stator BDFG are in great flexibility as the power winding and control winding are separately put on the two stators. The double-stator BDFG also has the advantages of increased slot filling factor and improved power density. The asymmetry of the Structure and electromotive force in this BDFG is investigated. An improvement is put forward for the double-stator BDFG with Segmented Structure and this could solve the asymmetry problems effectively. The simulation model is built in finite-element analysis, and the simulation results verify the effectiveness of the improvement very well.