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High temperature oxidation and oxychlorination behaviors of cold sprayed Inconel 718 deposits at 700?c

cORROSION ScIENcE 2022年 207卷

作者： Wu, Kaiqiang Sun, Wen Tan, Adrian Wei-Yee Tan, Sung chyn Liu, Erjia Zhou, Wei Nanyang Technol Univ Rolls Royce NTU Corp Lab 65 Nanyang Dr Singapore 637460 Singapore Nanyang Technol Univ Sch Mech & Aerosp Engn 50 Nanyang Ave Singapore 639798 Singapore Univ Southampton Malaysia Sch Engn Iskandar Puteri 79200 Johor Malaysia Rolls Royce Singapore Pte Ltd 1 Seletar Aerosp Crescent Singapore 797575 Singapore

The current research represents the first systematic study on high temperature oxidation and oxychlorination behaviors of cold sprayed Inconel 718. Tests were carried out at 700 celcius and cold sprayed Inconel 718 was shown to possess excellent oxidation resistance comparable to that of the bulk Inconel 718. In the oxychlorination condition, a single-layer structure was observed in the scale of cold sprayed Inconel 718 in contrast to the double -layer scale in the bulk Inconel 718. Superior oxychlorination resistance of cold sprayed Inconel 718 was revealed and attributed to the much smaller grain size and higher dislocation density.

关键词： A Metal coatings Superalloys B Thermal cycling TEM c chlorination High temperature corrosion A Metal coatings Superalloys B Thermal cycling TEM c chlorination High temperature corrosion

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Investigations on Preparation and Electrochemical Performance Optimization of LiMnPO4/c composites with High Tap Density

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PARTIcLE & PARTIcLE SYSTEMS cHARAcTERIZATION 2022年第2期39卷 2100203-2100203页

作者： cao, Shi-yuan chang, Long-jiao Luo, Shao-hua Bi, Xiao-long Wei, An-lu Liu, Jia-nan Bohai Univ Sch Chem & Mat Engn Jinzhou 121013 Peoples R China Engn Technol Res Ctr Silicon Mat Key Lab Jinzhou Liaoning Peoples R China Northeastern Univ Qinhuangdao Sch Resources & Mat Qinhuangdao 066004 Hebei Peoples R China

In this paper, the process route of synthesizing high tap density LiMnPO4 material by hydrothermal method with Li3PO4 as precursor is designed, and the microstructure and electrochemical properties of in situ carbon coated material are systematically studied. The phase, structure, morphology, and grain fineness distribution of the LiMnPO4/c are characterized by X-ray diffraction, scanner transmission electron microscope, and laser particle size analyzer. There are a series of process parameters are optimized by orthogonal, such as reaction temperature, reaction time, polyethylene glycol 400 to H2O volume ratio and reactants concentration. The results show that, in the range of approximate to 2.5-4.5 V, the original charge-discharge volume of the prepared battery cathode material is shown as 123.7 mAh g(-1) at a rate of 0.05 c. After 500 long cycles, the sample saves 95.55% (0.05 c) of the original capacity. At 550 degrees c, at different rates in the discontinuance voltage range of approximate to 2.5-4.5 V, the charge and discharge quantity of the cathode electrode raw materials obtained by individuals can be maintained at about 120.9 mAh g(-1) (0.1 c), 119.0 mAh g(-1) (0.5 c), 116.8 mAh g(-1) (1 c), respectively.

关键词： electrochemical properties hydrothermal synthesis LiMnPO (4) c lithium-ion battery tap density

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c,O-chelated organotin(IV) derivatives as potential anticancer agents: Synthesis, characterization, and cytotoxic activity

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APPLIED ORGANOMETALLIc cHEMISTRY 2022年第3期36卷 e6540-e6540页

作者： Somesan, Adrian-Alexandru Vieriu, Sabina-Madalina craciun, Alexandru Silvestru, cristian chiroi, Paul Nutu, Andreea Jurj, Ancuta Lajos, Raduly Berindan-Neagoe, Ioana Varga, Richard A. Babes Bolyai Univ Supramol Organ & Organometall Chem Ctr Dept Chem & Chem Engn 11 Arany Janos RO-400028 Cluj Napoca Romania Iuliu Hatieganu Univ Med & Pharm Res Ctr Funct Genom Biomed & Translat Med Cluj Napoca Romania

Organotin(IV) chemistry is nowadays in a continuous expansion due to the biological and medicinal potential found for some of these species. Within this study, the cytotoxic activity of several organotin(IV) compounds was investigated on two lung cancer cell lines (H522 and SK-MES-1) and on a normal lung cell line in order to have an overview of the toxicity and the selectivity of these derivatives. Moreover, the synthetic protocols, as well as the structural particularities of the novel organotin(IV) species, are also discussed. Hydrolysis of [2-{(cH2O)(2)cR}c6H4](2)SnPh2 [R = H (1), Me (2)] with p-toluenesulfonic acid as a proton source afford the expected derivatives [2-(OcR)c6H4](2)SnPh2 [R = H (3), Me (4)]. When hydrochloric acid is used in these reactions, a chlorine-phenyl exchange took place in addition to the removal of the acetal fragments and the following products [2-(OcR)c6H4](2)SnPhcl [R = H (5), Me (6)] were isolated. Treatment of 5 with 2 equiv of 3-aminomethylpyridine in neat affords the imino(aryl)tin compound 2-(3 '-PycH2NcH)c6H4](2)SnPhcl (7). The reaction between 6 and potassium nicotinate allows the isolation of the organotin(IV) carboxylate [2-{Oc (cH3)}c6H4](2)SnPh[O(O)cc5H4N-3] (8). compounds 1-8 were characterized by multinuclear NMR spectroscopy in solution, mass spectrometry, and IR spectroscopy, and their molecular structures were confirmed by X-ray diffraction analysis. compounds 1-8 were investigated for their antitumoral effects on Homo sapiens lung cancer cell lines (H522 and SK-MES-1) and on a normal bronchial epithelial cell line, BEAS-2B.

关键词： Sn-119 NMR spectroscopy c O-ligands cytotoxic activity organotin(IV) structural investigation

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NO HEGEL IN THE RAINFOREST on c.l.r. james's existentialist reading of wilson harris and finding spinoza in guyana

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ANGELAKI-JOURNAL OF THE THEORETIcAL HUMANITIES 2021年第5期26卷 57-71页

作者： Foster, christopher Ian Colorado State Univ Int Studies Ft Collins CO 80523 USA

If early caribbean philosophy is characterized by its pan-African flourishes, what is less well known is its flirtations with existentialism. Although c.L.R. James's 1965 Heideggerian reading of Wilson Harris's novel Palace of the Peacock and his 1966 lecture "Existentialism and Marxism" are cited in books on both James and Harris, oddly, there has been no substantial reading of Heidegger's own philosophy along with Palace of the Peacock, or, of James's misreading of Heidegger's technical term Dasein. In this article, I attempt that reading, while revealing a link between Dutch philosopher Baruch Spinoza, through existentialism, to Harris's work and thought. Harris's novel offers a radical critique of colonial racism through a re-working of Spinoza's metaphysics of Substance, and subsequently, although he only started the task, c.L.R. James's odd articulation of Harris with Heidegger is acute, notwithstanding existentialism's fall from fashion.

关键词： postcolonialism caribbean Studies pan-Africanism existentialism c L R James Martin Heidegger Wilson Harris Baruch Spinoza

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Elucidating the Role of Rh/c on the Pathways and Kinetics of Ketone-to-Secondary Amines Reaction

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cHEMcATcHEM 2022年第1期14卷 e202101270-e202101270页

作者： Arteaga-Perez, Luis E. Manrique, Raydel Ortega, Maray castillo-Puchi, Francisca Fraile, Juan E. Jimenez, Romel Univ Bio Bio Wood Engn Dept Lab Thermal & Catalyt Proc LPTC UBB Av Collao 1202 Concepcion 4030000 Chile Univ Concepcion Dept Chem Engn Carbon & Catalysis Lab CarboCat Av Victor Lamas S-NEdificio Gustavo Pizarro Concepcion 4030000 Chile

Biomass-based amines have received a lot of attention due to their sustainability and carbon economy. Herein, the roles of the metal sites (Rh-0 or Pd-0) and operating conditions on the kinetics and reaction pathways of the heterogeneous catalytic amination of cyclohexanone with aniline have been discussed. Rh/c provides secondary amines with remarkable selectivity toward the hydrogenation product (sigma S-i=72 %). The hydrogenation rate over Rh-0 is 1.5-fold higher than that observed over Pd-0, while its dehydrogenation capacity diminished (r(D_Rh )=0.74 h(-1) and r(D_Pd)=1.32 h(-1)). This difference in the hydrogenation/dehydrogenation performance allows control over the selectivity via disproportionation of an imine intermediate. The kinetic observations can be represented using the Langmuir-Hinshelwood model, indicating that the formation of the aminal intermediate is the rate-limiting step. The apparent activation energy for this step on Rh/c (55 kJ/mol) was higher than that previously reported for Pd/c (48 kJ/mol).

关键词： amination ketone Rh c kinetics reaction pathway

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Sensitivity study of c/O logging measurements by Monte carlo method

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APPLIED RADIATION AND ISOTOPES 2022年第0期188卷 110400页

作者： Szucs, Jozsef Gabor Balazs, Laszlo Eotvos Lorand Univ Inst Geog & Earth Sci Dept Geophys & Space Sci Pazmany Peter Setany 1-C H-1117 Budapest Hungary

carbon oxygen ratio (c/O) logging has great importance in the accurate determination of hydrocarbon satura-tion in the reservoir region. This measurement is independent of the salinity of the formation water, unlike alternative logging methods. Analysis of the measurement requires modelling of the time-dependent coupled neutron-gamma field produced by the tool, which is most efficiently done by the Monte carlo (Mc) method. Mc simulation can be used to generate the gamma spectrum at the detectors of the probe for a variety of rock physics conditions and borehole environments and thus the c/O can be determined by the processing of the simulated gamma spectrum. The simulation results are used to derive the interpretation diagrams for the basic petro-physical effects and to investigate the role of the side effects. considering the industrial practice of log evalu-ation, the resolution and limitations of the method is quantified in the measurement space by defining a goodness factor based on the area of the interpretation chart. The focus of this paper is on detector arrangement, but it also covers the effect of porosity, lithology, and the casing.

关键词： c O logging Monte carlo McNP Well log interpretation Oil saturation Oil holdup

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characterisation of chemical damage on tissue structures by multispectral imaging and machine learning procedures: Alkaline hypochlorite effect in c. elegans

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cOMPUTERS IN BIOLOGY AND MEDIcINE 2022年 145卷 105477-105477页

作者： Verdu, Samuel Fuentes, cristina Barat, Jose M. Grau, Raul Univ Politecn Valencia Dept Tecnol Alimentos Valencia Spain

Multispectral imaging represents a powerful technique to maximise data collection and analysis for biological materials. It improves the exploitation and understanding of in vivo/vitro experiments. This work focused on testing the capability of multispectral imaging to characterise the tissue damage produced by alkaline hypochlorite on the body and eggs of the biological model c. elegans. To that end, three synchronisation processes with different final bleach and sodium hydroxide concentrations were performed. The impact of treatments was characterised by measuring egg viability and morphology, besides capturing multispectral images of both nematode bodies and eggs. Multispectral images consisted of seven slices captured from different wavelengths within the visible/infrared spectrum by different light-pass filters. The results showed dependence between increased alkaline hypochlorite concentration and loss of egg viability/morphology. This relation was also observed for the imaging data, which showed alterations to tissue transmittance for all the tested wavelengths for both bodies and eggs. Localised alterations related to alkaline hypochlorite diffusion through anatomical nematode orifices were recognised. Applying multivariate methods to imaging data successfully characterised tissue alterations, from which treatment type was predicted for both nematodes and eggs. Moreover, the alterations recorded by imaging data were also used to predict egg viability regardless of treatment type (0.94). The high correlation between the imaging data from nematodes and eggs with egg viability evidenced multispectral imaging's ability to characterise tissue damage and its possible practical application to study alterations to the tissues of this biological model.

关键词： Multispectral imaging Tissue damage Machine learning c elegans Egg viability Multivariate analytics

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comparative study of microstructure and ablation behaviour of c/c-Hfc-Sic composites prepared under two different conditions

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MATERIALS cHARAcTERIZATION 2022年 194卷

作者： Liu, Zhiqiang Fu, Qiangang Shi, Huilun Zhang, Jiaping Jia, Yujun Northwestern Polytech Univ State Key Lab Solidificat Proc Shaanxi Key Lab Fiber Reinforced Light Weight Com Xian 710072 Shaanxi Peoples R China

c/c-Sic-Hfc composites were prepared using reactive melt infiltration (RMI) under a vacuum (noted as HS-V) and normal pressure (noted as HS-NP), separately. The distribution of the introduced Sic and Hfc ceramics can be regulated by adjusting the RMI pressure. Different pressures of the environment at the high temperature stage led to the difference in volatilization of Si in the melt and the ratios of c and HfSi2 in unit volume on the surface of the sample, resulting in the different composition of the sample surface. A HfSi2-Hfc-Sic mixed layer was formed on the surface of HS-NP, while Hfc coating was formed on the surface of HS-V. HS-NP possessed better ablation performance than HS-V. After ablation for 120 s, its mass ablation rate decreased by 87.81%. The presence of HfSi2 improved the densification of HfO2 film, which made the ablation resistance of HS-NP better than HS-V. This work provides a guide for choosing an idea pressure condition during RMI to obtain c/c-Sic-Hfc composites with high ablation resistance.

关键词： c c composites Reactive melt infiltration Pressure Ablation

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High- Speed Tensile Deformation Behavior of a Metastable 18cr-6Ni-0.2N-0.1c Steel

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ISIJ INTERNATIONAL 2022年第10期62卷 2054-2060页

作者： Oe, Masashi Tsuchida, Noriyuki Ishimaru, Eiichiro Kawa, Masatomo Univ Hyogo 2167 Shosha Himeji Hyogo 6712280 Japan Univ Hyogo Grad Sch Engn 2167 Shosha Himeji Hyogo 6712280 Japan Nippon Steel Stainless Steel Corp Res & Dev Ctr 3434 Shimata Hikari 7438550 Japan

The present study investigated the high-speed deformation behavior of 6Ni-0.2N-0.1c steel. 0.2% proof stress (0.2% PS) of the 6Ni-0.2N-0.1c steel increased with an increase in strain rate ((epsilon) over dot) but tensile strength (TS) indicated almost the same value at (epsilon) over dot above 10(-1) s(-1). Uniform elongation (***) largely decreased with an increase in (epsilon) over dot. TS and *** of the 6Ni-0.2N-0.1c steel at 103 s(-1) were almost the same as those of SUS304 steel. When the effect of (epsilon) over dot on mechanical properties was compared between the 6Ni-0.2N-0.1c and SUS304 steels, the strain rate dependence on 0.2% PS was larger in the 6Ni-0.2N-0.1c steel and that on TS was different at (epsilon) over dot above 10(0) s(-1). And the decrease of *** with an increase in (epsilon) over dot was larger in the 6Ni-0.2N-0.1c steel. The decrease of *** at 10(3) s(-1) was discussed from the viewpoint of change of flow stress at the maximum load point with an increase in (epsilon) over dot. The estimated results proposed that austenite phase hardly transformed into deformation-induced martensite (alpha') up to the maximum load point at 10(3) s(-1) in the 6Ni-0.2N-0.1c steel. The tensile properties of the 6Ni-0.2N-0.1c steel are largely influenced by the higher strength of alpha'. It is difficult for the 6Ni-0.2N-0.1c steel to produce TRIP effect at high strain rates because the deformation-induced martensitic transformation is suppressed.

关键词： TRIP metastable austenitic stainless steel N c high speed deformation strain rate

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commensurate Assembly of c60 on Black Phosphorus for Mixed-Dimensional van der Waals Transistors

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SMALL 2022年第10期18卷 2105916-2105916页

作者： Yun, Tae Keun Lee, Yangjin Kim, Min Je Park, Jeongwoo Kang, Donghee Kim, Seongchan choi, Young Jin Yi, Yeonjin Shong, Bonggeun cho, Jeong Ho Kim, Kwanpyo Yonsei Univ Dept Phys Seoul 03722 South Korea Inst for Basic Sci Korea Ctr Nanomed Seoul 03722 South Korea Yonsei Univ Dept Chem & Biomol Engn Seoul 03722 South Korea Hongik Univ Dept Chem Engn Seoul 04066 South Korea

2D crystals can serve as templates for the realization of new van der Waals (vdW) heterostructures via controlled assembly of low-dimensional functional components. Among available 2D crystals, black phosphorus (BP) is unique due to its puckered atomic surface topography, which may lead to strong epitaxial phenomena through guided vdW assembly. Here, it is demonstrated that a BP template can induce highly oriented assembly of c-60 molecular crystals. Transmission electron microscopy and theoretical analysis of the c-60/BP vdW heterostructure clearly confirm that the BP template results in oriented c-60 assembly with higher-order commensurism. Lateral and vertical devices with c-60/BP junctions are fabricated via a lithography-free clean process, which allows one to investigate the ideal electrical properties of pristine c-60/BP junctions. Effective tuning of the c-60/BP junction barrier from 0.2 to 0.5 eV and maximum on-current density higher than 10(4) mA cm(-2) are achieved with graphite/c-60/BP vertical vdW transistors. Due to the formation of high-quality c-60 film and the semitransparent graphite top-electrode, the vertical transistors show high photoresponsivities up to approximate to 100 A W-1 as well as a fast response time under visible light illumination.

关键词： black phosphorus c (60) fullerenes mixed-dimensional molecule epitaxy van der Waals heterostructures vertical transistors

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