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In this paper, the effect of heat treatment on the structure and magnetic properties of the alloy is investigated by heat treating the melted Fe2Cr1-xMnxGa samples at different temperatures. It is found that the structure and magnetic properties of Fe2Cr1-xMnxGa are very sensitive to heat treatment and there is a certain degree of disorder. The structure of the prepared samples changes with different conditions of heat treatment, and the change in structure will in turn affect the magnetic behavior of the alloy. The magnetization intensity increases with increasing annealing temperature, indicating that the orderliness of the samples is improved by heat treatment. The magnetization intensity of the samples decreases with the doping of Mn content, which is due to the anti-parallel arrangement of the Fe-Mn spin magnetic moments by the doped Mn atoms. [ABSTRACT FROM AUTHOR]

As exotic states of quantum matter, topological insulators have been widely used in the field of next-generation electronic and optoelectronic devices. Due to the co-existence of metal surface states and a narrow gap of 0.3 eV, ultrafast charge transport capability and infrared light absorption capability are both observed in Bi2Se3, making it a research hotpot for new optoelectronic devices. In this paper, Bi2Se3 thin films were electrochemically deposited on ITO substrates in an acidic electrolyte solution by the potentiostat deposition method. The growth conditions of Bi2Se3 thin films were determined by the control variable method as pH 0.2-0.8, deposition potential-0.15 V vs. Ag/AgCl, and deposition time 1 h. Meanwhile, the structure and morphology of Bi2Se3 thin films were studied by field emission transmission electron microscopy, X-ray diffractometer, and other characterization techniques. Finally, the photoresponse characteristic of Bi2Se3 thin films was studied, and the influence of the annealing process on its photoelectric characteristic was investigated. The test results show that the annealed Bi2Se3 thin film has good photoelectric performance in the near-infrared band. The responsivity and specific detectivity are about 6.3×10-5 A/W and 2.9×106 cmHz0.5/W, respectively. [ABSTRACT FROM AUTHOR]

3D printing technology has the characteristics of not requiring mold and manufacturing cost to be insensitive to the complexity of design, and is suitable for manufacturing complex structure products such as structure-function integration, bionics design, lightweight dot matrix structure, thin wall and the like. However, due to some unavoidable defects in the interior and surface, it is necessary to combine appropriate post-treatment to improve the microstructure and defects of the metal parts. In this paper, the research progress of different post-processing of 3D printing parts from domestic and foreign scholars were summarized from three aspects of microstructure, internal defects and surface defects, and the mainstream direction of future 3D printing post-processing research was analyzed, providing a reference for 3D printing technology to produce more qualified parts. [ABSTRACT FROM AUTHOR]

Two-dimensional transition metal carbon/nitride (MXene) has a graphene-like structure, and microscopically exhibits lamellar and various surface groups. It has good electrical conductivity, ion transport and high hydrophilic properties, and becomes ideal electrode material for supercapacitor. The MXene layer and layer, which are prone to collapse and stacking, and the presence of functional groups are detrimental to the performance as an electrode material. It would have great application prospects, if its electrochemical performance could be improved by heat treatment, ion intercalation and carbon composites. In this paper, the preparation methods of MXene materials were firstly introduced, and then the effects of surface modification and structure optimization on the electrochemical performance of MXene supercapacitors were summarized. Finally, the research prospects of MXene materials on supercapacitors were prospected. [ABSTRACT FROM AUTHOR]

In this paper, Ag-15Cu-10Au-2Ni alloy has been fabricated by vacuum induction melting, and the plastic deformation and microstructure, mechanical and electrical properties after heat treatment were investigated. The results show that the Ag-15Cu-10Au-2Ni alloy was mainly composed of silver-rich phase and copper-rich phase, as well as Ni mostly existed in copper-rich phase. The significant strengthening effect could be observed obviously, while the hardness was 201 Hv (90 Hv as cast condition) and the tensile strength was 744 MPa for the 95% deformed alloy. For the specimen annealed at 650 °C for 1 h, the elongation reached 31.8% and the hardness was close to that of the cast condition. The resistivity of the alloy decreased at first and then increased with the increase of annealing temperature. The alloy annealed at 350 °C for 1 h had minimum resistivity (3.98 Ωµ ⋅ cm) due to the emerge of order phase transition after annealing at low temperature region. [ABSTRACT FROM AUTHOR]

The new type Fe-Ni-Cr-Ti alloy mainly used in pressure sensors. Follow this new type pressure sensor’s characteristics of ultra-thin wall, in order to get the accuracy level of leak rate below 1×10-7Pa·L/S and the fitting precision reach 0.01%FS, the raw material bar with fine and uniform microstructure and consistency of performance plays a key role. This paper research the influence on microstructure of the heat treatment process with different solution temperature and different solution time. The results shows that the grain size of the raw material bar quenched at 980°C×60 minutes before a certain cold deformation is 5 or smaller, which achieve the desired goal of fine and uniform microstructure,it is beneficial to prepare sensors with excellent vibration characteristics,and satisfy the element’s performance index of leak rate fitting precision. [ABSTRACT FROM AUTHOR]

In order to improve the surface quality of packaging materials, and the requirements for the industrial production, aerospace, daily life are satisfied. Ni-P coatings were deposited on the ceramic surface of packaging materials by using electroless plating method in this paper. The surface topography, phase structure, crystallization temperature, and wear-resisting property of the coatings were investigated by using scanning electron microscope, X ray diffract-meter, differential thermal analyzer, friction wear testing machine. The results indicate that when the nickel sulfate content in the bath is 30 g/L and the heat treatment temperature is 500 °C, the wear loss weight of the Ni-P coating reaches the minimum of 22.2 mg. The wear mechanism of Ni-P coatings were mainly abrasive wear and adhesive wear with the temperature at 500 °C. DSC analysis shows that the crystallization temperature corresponding to the main exothermic peak of the Ni-P coating is 339 °C. When the heat treatment temperature reaches 500 °C, the final stable phases of Ni-P coating are Ni + Ni3P+NiO. [ABSTRACT FROM AUTHOR]