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Start Over Author "DENG Ming" Journal advanced materials research
100 results on '"DENG Ming"'

1. Effect of Microwires Diameters on the Microwave Properties of Glass-Coated Microwires/Dielectric Composite

Author

Bi Jia, Yong Jiang Di, Peng Jun Cao, and Deng Ming Chen

Subjects
Permittivity, Materials science, Nuclear magnetic resonance, Permeability (electromagnetism), Composite number, General Engineering, Microwave permeability, Coaxial line, Dielectric, Composite material, Microwave, Natural resonance
Abstract

The microwave properties of Glass-coated FeCuNbVSiB and CoFeNiSiB microwires/dielectric composite with different microwires diameters were studied. Relative complex permeability and complex permittivity was measured by transmission/reflection (T/R) coaxial line method at the frequency range of 2-18 GHz for composite samples. The results show that the microwave permeability and permittivity increases with the lengthening of the microwires in composite. The microwave permeability, natural resonance frequency and microwave permittivity increase with the decrease of the diameter of the microwires.

Published
2013

3. Influence of Heat Treatment on Corrosive Property of 5083 Aluminum Alloy

Author

Chun Hong Li, Deng Ming Chen, and Chunmei Li

Subjects
Corrosion potential, Materials science, Metallurgy, Alloy, General Engineering, chemistry.chemical_element, engineering.material, Intergranular corrosion, Microstructure, Electrochemistry, Electrochemical corrosion, Corrosion, chemistry, Aluminium, engineering
Abstract

The microstructure and intergranular corrosion phenomenon were investigated by means of optical imaging,SEM and EDS. Hardness was conducted and electrochemical corrosion properties were researched in 3.5% Nacl solution by electrochemical tester.The result showed, there was no intergranular corrosion phenomenon when the samples underwent cold rolling and stabilization heat treatment;The intergranular corrosion was obviously when the samples were annealed at 180°C for 90h or 150h;The corrosion potential of TO1 state annealed at 180°C for 90h and TO2 state annealed at 180°C for 150h was lower than cold rolled and stabilization heat treatment samples，they were more susceptible to electrochemical corrosion.

Published
2013

4. Effect of Annealing on the Magnetostatic and Microwave Electromagnetic Properties of Glass-Coated Fe-Rich Microwires

Author

Bi Jia, Deng Ming Chen, Yong Jiang Di, Jianjun Jiang, and Jun Wang

Subjects
Permittivity, Materials science, Nuclear magnetic resonance, Annealing (metallurgy), General Engineering, Coercivity, Composite material, Atmospheric temperature range, Saturation (magnetic), Ferromagnetic resonance, Microwave, Nanocrystalline material
Abstract

Glass-coated FeCuNbVSiB microwires was annealed in the temperature range of 380 °C to 600 °C. The microstructures and magnetostatic properties of the glass-coated microwires were characterized by X–ray diffraction (XRD), Vibrating Sample Magnetometer (VSM) respectively. Relative complex permeability and complex permittivity was measured by transmission/reflection (T/R) coaxial line method in the frequency range of 2-18 GHz for as-casted and annealed Fe-rich microwires samples. The measured results show that the coercive field of the Fe-rich microwires decrease to 1.54 Oe at 470 °C, and then increase rapidly with the increasing of the annealing temperature. The coercive field and saturation field of the microwire samples increased abruptly with the outgrowth of the Fe-B hard magnetic phase in the Fe-rich microwire samples. The imaginary part of permeability and the natural ferromagnetic resonance frequency decrease for the thermal treatment below 470 °C, and then increase with the annealing temperature up to 530 °C. The change of magnetostatic and microwave electromagnetic properties of the microwires samples with the annealing process come from the change of the anisotropy caused by the internal stress.

Published
2012

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