PbZr0.52Ti0.48O3(PZT)/PbZrO3(PZ) composite films are deposited on LaNiO3/SiO2/Si substrates using sol–gel method, and annealed at 620 °C for a different time with the rapid thermal annealing technology. The microstructures, crystal structure, and electrical performance of the PZT/PZ composite films are researched. When the composite films are annealed at 620 °C for 3 min, the PZT films show the perovskite phase and the PZ films exhibit the pyrochlore phase with tiny perovskite phase, making the films obtain a linear hysteresis loop and possess the high energy storage density of 10.0 J cm−3 and the energy storage efficiency of 84.8%. The aforementioned experimental results show that the phase structure of the PZT/PZ multilayer films can be regulated by different annealing times, which would improve the energy storage performance.

WC ceramic particles reinforced composite coatings were in situ synthesised on the surface of Q235 steel by GTAW processing using mixtures of W, C, Ni, B-Fe and a small amount of Si iron. Microstructures and phase of the coating were analysed by scanning electron microscope, energy dispersive spectrometer and X-ray diffractometer. Furthermore, microhardness and abrasion resistance also were studied using microhardness tester and abrasive tester, respectively. The results showed that the coating was no pore and crack free. The coating consisted of FeNi matrix, M 7 C 3 , Ni 2 Si, Ni 3 B, Fe 2 B and WC blocky particles. Owing to the uniform distribution of in situ synthesised carbide particles, high hardness and excellent wear resistance were achieved. The maximum hardness of the coating was 1578.8 HV 0.2 . The relative wearability of the composite was 23.5 times higher than Q235 steel substrate which showed good wear resistance.

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