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In this paper, boron carbonitride films were deposited by a dc reactive unbalanced magnetron sputtering of conductive B 4 C target in a mixture gas of nitrogen and argon. The films with various content of N were obtained by a varying N 2 /Ar flow ratio in the mixed gas from 0/100 to 30/100. Structures and compositions of the films were investigated by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The results show that the content of B, C, N, and the ratio of each element binding states depend on the ratio of N 2 /Ar flow. The nitrogen content showed the rising tendency and then came to the saturation stage with an increasing N 2 /Ar flow ratio. The maximal N content of 33.1 at.% was obtained when N 2 /Ar flow ratio was 30/100. Nitrogen in the film is prior to binding with B forming sp 2 B-N bond, and then with C forming sp 2 C-N bond, when the N 2 /Ar ratio is over a certain value during the nitrogen was introduced into a vacuum chamber. The results of the FTIR indicate that the film is a compound of B-C-N atomic hybridization.Index Terms-Bonding configurations, boron carbonitride (BCN) film, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS).

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Crystallization behavior of sheared polymer melts of a series of poly(ethylene-co-octene)s with different octene content was investigated by different scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and synchrotron small-angle X-ray scattering (SR-SAXS) techniques. The DSC results indicated that the hexyl branches content had dramatic effects on the thermal properties and crystallinity of polyethylene. It was also found that shear had no obvious effects on the size of either crystallite or lamellae. However, both crystallite and lamellae were oriented by shearing, especially for the lamellae. All obtained results indicate that the initial states of the polymer melt play an important role in affecting the crystallization behaviors. The difference of the shear-induced crystalline structure evolution and the orientation between crystallite and lamellae support the preordered mesomorphic phase of flexible polymer crystallization process proposed by Strobl.

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