Nanostructured yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) were produced by atmospheric plasma spraying. The microstructure of the sprayed coating was characterized by transmission electron microscope (TEM) and scanning electron microscope (SEM). The nano-coating had a higher porosity of~25% than the conventional coating, which is mainly attributed to the large amount of intersplat gaps in the nano-coating. The thermal conductivity for the nano-coating was in the level of 0.8-1.1 W/mAEK, about 40% lower than that for the conventional coating, indicating a better thermal insulation performance. The nano-TBC exhibited a thermal cycling lifetime of more than 500 cycles, whereas spallation failure of the conventional TBC occurred within 200 cycles. Accelerated sintering could be one of the reasons for the failure of the nano-TBC.

Matrix completion that estimates missing values in visual data is an important topic in computer vision. Most of the recent studies focused on the low rank matrix approximation via the nuclear norm. However, the visual data, such as images, is rich in texture which may not be well approximated by low rank constraint. In this paper, we propose a novel matrix completion method, which combines the nuclear norm with the local geometric regularizer to solve the problem of matrix completion for redundant texture images. And in this paper we mainly consider one of the most commonly graph regularized parameters: the total variation norm which is a widely used measure for enforcing intensity continuity and recovering a piecewise smooth image. The experimental results show that the encouraging results can be obtained by the proposed method on real texture images compared to the state-of-the-art methods.

Fora dvanced anode materials involving alloy/dealloyc hemistry for potassium ion batteries (PIBs), twodimensional (2D) bismuth subcarbonate (BCO) nanosheets that possess high theoretical capacity of 631 mAh g À1 are proposed. The large lattice spacing of 0.683 nm along ba xis facilitate insertion of K + ion to boost high-capacity delivery of ca. 610 mAh g À1 ,a nd the in situ nano-crystallization well ease volume changes of the integrated particle and shorten ion diffusion path during potassiation/depotassiation. After coupling with aconcentrated KFSI-G2 electrolyte,the robust and efficient SEI built from enhanced participation of FSI À synergistically endow structural stability of the flower-like BCO,a nd enable ap rolonged cycling performance with capacity of ca. 300 mAh g À1 at 0.2 Ag À1 for 1500 cycles, achieving an ultralow decayr ate of 0.007 %. Mechanistic investigations probe the electrochemistry involving alloy/dealloya nd phase transition of the electrode.

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