Cr-C-W coatings were deposited from organo-aqueous solutions containing dimethylformamide by electrolysis. The obtained deposits were studied by the modern physical methods: X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), time-of-flight secondary ion mass spectrometry (SIMS), and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The corrosion of Cr-C-W electrolytic deposits was studied in the solutions of sulfuric acid, sodium chloride, and hydrochloric acid. Cr-C-W coatings demonstrated higher corrosion resistance compared with chromium deposits. It was suggested that the decrease of the corrosion rate is caused by the formation of the thin layer enriched with tungsten and its oxides at the surface of the Cr-C-W alloy. This assumption was confirmed by both XPS and SIMS.

| Figures/TablesFigures/Tables | ReferencesReferencesSTRESZCZENIERozwojowi ostrych białaczek już w momencie diagnozy towarzyszy subkliniczna aktywacja krzepnięcia. Zaburzenia hemostazy, wynikające m.in. z uszkodzenia śródbłonka i osłabionej funkcji syntetycznej wątroby, nie zawsze manifestują się jawną skazą krwotoczną lub chorobą zakrzepową. Wydolność mechanizmów kompensacyjnych na poziomie układu antykoagulacyjnego białka C - zapewnia równowagę hemostatyczną między czynnikami prozakrzepowymi i prokrwotocznymi. Badaniami objęto 20 chorych z nowo rozpoznanymi ostrymi białaczkami. W początkowym okresie rozwoju choroby obserwowano obniżenie stężeń antykoagulacyjnych białek syntezowanych w wątrobie (PC, PS) oraz wzrost sTM i znaczne obniżenie sEPCR - białkowych markerów uszkodzenia śródbłonka naczyń.

W LIII EXAFS of WS2/C and Ni-WS2/C catalysts showed that the WS2/C catalyst contains small WS2 particles of about 7 W atoms, while the Ni-WS2/C catalyst contains larger particles. Ni K EXAFS demonstrated that the Ni atoms were present at the edges of the WS2 particles in a Ni-W-S like structure, like the Ni-Mo-S structure in Ni-MoS2/C catalysts. In the Ni-WS2/C catalysts Ni is, however, coordinated by six sulphur atoms, four at 2.22 Å and two at 2.35 Å from the Ni atom.

New relations and transformation formulas for the Appell function F-2 (a, b, b; c, c; w, z) and confluent Appell functions (Humbert functions) (1), (2) are obtained. These relations include limit formulas, integral representations, differentiation and recurrence formulas. Summation formulas for F-2, (1), and (2) are derived.

The effect of ball milling on microstructural change of (Ti,W)C solid solution was investigated. In addition to the particle size reduction with milling time, detailed studies using the X-ray diffraction line profiles were carried out to evaluate the microstructural parameters, including lattice parameter, crystallite size and microstrain. Nelson Riley extrapolation and Williamson-Hall method are employed. The results suggest lattice expansion, with the lattice parameter increasing from 43212 A to 43241 A. The defects and surface stress generated during ball milling are deemed to be responsible for the increased d-spacing of (Ti,W)C solid solution with milling time. The crystallite size displays a diminishing trend with increasing milling time, which is consistent with the SEM observation. However, the microstrain developed is tensile in nature and firstly increases with up to 36 h milling, and then the strain reduces for further milling perhaps due to the strain relaxation by the formation of dislocations. (C) 2017 Elsevier Ltd. All rights reserved.

Based on a critical literature review, the Al-C-Ni and C-Ni-W ternary systems are thermodynamically reassessed using the CALPHAD (CALculation of PHAse Diagrams) method. The calculated phase equilibria and thermodynamic properties can well reproduce the experimental data. The Al-C-Ni-W thermodynamic database is then established using descriptions of the accepted ternary systems. The calculated solubility of WC in AINi(3) is in good agreement with the experimental result. The computed solubility is used to describe the hardness-solubility dependence along the WC-AlNi3 section according to the solid solution strengthening mechanism. The effect of substitution of Co by Ni and AlNi3 as the binder phase on the phase relations in the WC-based cemented carbides is also investigated using the present thermodynamic parameters. Good agreement between calculated and experimental results indicates that the current thermodynamic database could provide an efficient guidance for designing and developing innovative WC-AlNi3 cemented carbides. (C) 2014 Elsevier Ltd. All rights reserved.

The retention of hydrogen (H) isotope in plasma-facing materials (PFMs) is an important issue for next step fusion device. We used density functional theory (DFT) to study the chemical bonds of H in tungsten-carbon (W-C) mixed layers of tungsten surface, aiming to explore the retention behaviour of H in PFMs. The solubility of C in W was first calculated for revealing the phase components in W-C mixed layers. It was found that C has low solubility in W, which prefers to be segregated on the W surface. Vacancies can enhance the solution of C in W. This makes C appear somewhat carbide feature. Thus, W-C mixed layers should contain multiple phase components. H retention strongly depends on the phase components in the W-C mixed layers. The solution of C will suppress the retention of H in W no matter whether neighbouring vacancies are present, or not. Hydrocarbon precursors, which were observed in desorption experiments, prefer to form by means of H binding to C atoms in C amorphous, or in precipitators in the W-C mixed layers, while not in tungsten carbide phase or in W bulk. Our investigation reasonably explains the experimental results.

The process pp -> W(-)c produces polarized charm quarks. The polarization is expected to be partly retained in Lambda(c) baryons when those form in the c-quark hadronization. We argue that it will likely be possible for ATLAS and CMS to measure the Lambda(c) polarization in the W+c samples in Run 2 of the LHC. This can become the first measurement ever of a longitudinal polarization of charm quarks. Its results will provide a unique input to the understanding of polarization transfer in fragmentation. They will also allow applying the same measurement technique to other (e.g., new physics) samples of charm quarks in which the polarization is a priori unknown. The proposed analysis is similar to the ATLAS and CMS measurements of the W+c cross section in the 7TeV run that used reconstructed D-meson decays for charm tagging.