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In this experiment, several coatings, which were used 434L ferrite stainless steel powders and B4C powders as raw material, were prepared under different laser scanning power. The samples of the coatings were detected by XRD and EDS, and observed by OM and SEM. The results are shown as follow: when laser scanning power is 1800W, the cladding layer contains FeB and CrB6, as scanning power increasing, these two phases disappear in cladding layer, and Fe2B and CrB are detected in the layer. Fe2B, CrFeB, (Cr Fe)7C3, Fe-Cr solid solution are found in all samples no matter which laser scanning power are changed to prepare cladding layers The morphology of phases rich boron and carbon transform from an irregular layer-like shape to a cycle-like or a bar-like one with the scanning power increasing.

Graphene paper (GP) with layered structure and highly conductive network is fabricated by a facile technique of vacuum filtration and studied as a single-component and binder-free anode of lithium ion batteries (LIBs). The process of fabrication of GP without any binder and high-temperature treatment, in the meantime, great improvement in both the capacity and cycling performance of the GP electrodes have compared with other kinds of traditional graphite electrode materials. Given the simplifying anode fabrication, low manufacturing costs and many electrochemical properties of the GP anode, it is regarded as an excellent anode material of LIB with great promise for its both excellent cycling performance and electrochemical properties. The specific capacity can reach to over 200 mAhg-1after 60 charge-discharge cycles under the current rate of 50 mAg-1.

The objective of the present study was to find the influence of powder feed rate on macroscopic morphology, microstructure and hardness of F313 iron-based alloy clad coatings. Controlling powder feed rate can assist with achieving favorable macroscopic morphology, microstructure and hardness. Four different powder feed rate were used in our experiments to prepare clad coatings. The macroscopic morphology, microstructure and hardness were tested using OM, SEM, and Vickers hardness tester. The study founds decreasing powder feed rate is possible to achieve smoother surface, but at the same time thickness of coatings get thinner. Microstructure of cross sections is divided into inter-dendrites eutectic structure and dendritic matrix. In the upper region the microstructure tends to be formed of cellular-like dendrites whereas in the lower region branch-like dendrites tend to form. Hardness decreases with increasing of powder feed rate generally.