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• The novel triple cation Organic-inorganic hybrid perovskites (OHPs) Cs 0.05 (FA x MA 1-x) 0.95 PbBr y I 3-y based optoelectronic coupling memristors were fabricated. • Capacitive coupling behaviors are observed. • By changing voltage and light, the device can evolve from capacitive behavior to pure memristive behavior. • The corresponding physical mechanisms is investigated. Memristors are new type of circuit element with the characteristics of both integrated computing and storage, which can promote the development of artificial intelligence and memory- computing fusion technology. In this manuscript, a novel triple cation Organic-inorganic hybrid perovskite (OHP) based optoelectronic coupling memristors with structure of FTO/TiO 2 /Cs 0.05 (FA x MA 1−x) 0.95 PbBr y I 3−y /Al were fabricated, hysteresis loops with low power consumption, high HRS/LRS ratio and obvious light response are presented. Besides, capacitive coupling behaviors are observed in current curves. By changing voltage or light condition, memristors can evolve from capacitive behavior to pure memristive behavior. Physical mechanisms are discussed to explain this phenomenon. This work opens up a way in improving the resistive switching performances of OHP memristors, and can be of great benefit to the potential application in neuromorphological analysis. [ABSTRACT FROM AUTHOR]

• A novel copper matrix composite reinforced with CrCoNi particles was fabricated. • Synergy of high strength and ductility can be obtained by proper CrCoNi content. • Load transfer strengthening is mainly responsible for the improved strength. • High deformation ability of CrCoNi and laminated structure lead to high ductility. [Display omitted] In this work, the copper (Cu) matrix composites reinforced by medium entropy alloy (MEA) CrCoNi particles with microlaminated structure were successfully fabricated using vacuum filtration, spark plasma sintering (SPS) and subsequent hot rolling. The effects of the content of MEA CrCoNi particles on the mechanical properties were systemically investigated, and the relevant strengthening and toughening mechanism were discussed. It is found that the fabricated composites present much higher strength than their counterpart of pure Cu. Moreover, the combination of high strength (326±3.9 MPa) and good ductility (20.9±2.3%) with using 10 vol% CrCoNi particles as reinforcement can be achieved, which can be attributed to the combined effects of uniform dispersion of CrCoNi particles, well bonded interface bonding, the microlaminated structure. It is determined that the load transfer strengthening is the dominant strengthening mechanism in present fabricated composites. This work sheds light on fabricating Cu matrix composites with high mechanical properties by employing novel reinforcement and microstructure design. [ABSTRACT FROM AUTHOR]

• We firstly studied the oxygen vacancies of BiOCl 0.95 Br 0.05 exposed with different facets. • OVs on (001) facets exposed BiOCl 0.95 Br 0.05 can only slightly enhance its activity. • OVs on (010) facets exposed BiOCl 0.95 Br 0.05 can largely enhance its activity. • Doped Br- and OVs on BiOCl 0.95 Br 0.05 -010-OVs play a synergistic effect in PCPNa degradation. • Electrons and surface . OH can directly react with PCPNa over BiOCl 0.95 Br 0.05 -010-OVs. Both electrons and active oxygen species can directly react with PCPNa on BiOCl 0.95 Br 0.05 -010-OVs, while over BiOCl 0.95 Br 0.05 -001-OVs only active oxygen species can directly participate in PCPNa degradation. [Display omitted] The control of exposed facets and surface oxygen vacancies (OVs) in BiOCl has sparked huge interest in enhancing its visible-light photocatalytic activity. However, the dual control of OVs and exposed facets on BiOCl 1 -x Br x for sodium pentachlorophenate (PCPNa) degradation has not received much attention yet. For the first time we increased the amount of OVs on BiOCl 0.95 Br 0.05 exposed with (001) or (010) facets via UV-light irradiation. We studied the photocatalytic activity of the obtained samples by degrading PCPNa under visible light irradiation, and found OVs and doped Br- on (010) facets-exposed BiOCl 0.95 Br 0.05 -010-OVs exhibited a synergistic effect. The degradation rate of PCPNa on BiOCl 0.95 Br 0.05 -010-OVs was about 3.5 times of the sum of that on BiOCl 0.95 Br 0.05 -010 and BiOCl-010-OVs. Differently, the photocatalytic performance of BiOCl 0.95 Br 0.05 -001-OVs only slightly increased compared to that of BiOCl-001-OVs. The synergistic photocatalytic effect of OVs and Br- over BiOCl 0.95 Br 0.05 -010-OVs was proposed to be ascribed to its more negative conduction band and higher PCPNa adsorption capacity, which was good for the direct reaction of electrons and surface . OH with PCPNa on it. Significantly, although the photocatalytic activity of all the other samples obviously decreased after placing for more than 4 months, the photocatalytic performance of BiOCl 0.95 Br 0.05 -010-OVs was obviously enhanced and the reason was explained. This study provided a new strategy for enhancing the photocatalytic activity of (010) facets-exposed BiOCl for PCPNa degradation. [ABSTRACT FROM AUTHOR]

• Combined with thermodynamic calculation, the formation mechanisms of grain morphology and Laves phase are discussed in detail. • The contribution of different strengthening mechanisms to yield strength is quantitatively calculated. • The cause of anisotropy of fatigue crack growth rate in vertical and horizontal specimens is clarified. The microstructure and the anisotropy of mechanical properties for Inconel 625 superalloy prepared by directed energy deposition (DED) were investigated in this study. The microstructure of as-deposited sample was mainly composed of epitaxial columnar grains, which showed a z-shaped distribution along the deposition direction. Combined with thermodynamic calculation, the formation mechanism of Laves phase in as-deposited Inconel 625 superalloy was discussed in detail. Owing to the anisotropic microstructure of as-deposited sample, tensile properties and fatigue crack growth (FCG) behavior showed significant anisotropy. Compared to vertical sample, the grain boundary volume fraction in horizontal sample was larger, which caused that the ability of grain boundary strengthening and the resistance of fatigue crack growth were higher in horizontal sample during tensile and fatigue crack growth process. As a result, the yield strength and the ultimate tensile strength of horizontal sample were higher, while the fatigue crack growth rate was lower. However, the elongation of horizontal sample was smaller than that of vertical sample caused by the Laves phase distribution. [ABSTRACT FROM AUTHOR]