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FUNDAMENTAl PROBlEMs IN PUlsED-BIAs ARC DEPOsITION

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Acta Metallurgica sinica(Engl.s. letters) 2002年第1期15卷 91-103页

作者： G.Q. lin Z.F. Ding D. Qi N.H. Wang M.D. Huang D.Z. Wang Y.N. Wang C. Dong l.s. wen lab. for Mat. Modification by l.s.r Ion and Electron. Beams Dalian Univ. of Technol. Dalian 116024 China

Arc deposition, a widely used surface coating technique, has disadvantages such as large droplet size and high deposition temperature. Recent trend in its renovation is the introduction of pulsed bias at the. substrate. The present paper attempts to describe the deposition process of TiN fil.s.using this technique with emphasis laid on the understanding of the basic problems such as discharge pl.s.a properties, temperature calculation, and droplet size reduction. We show that this technique improves the film micro structure and quality, lowers deposition temperature, and allows coatings on insulating substrates. After analyzing load current oscillation behaviors, we have determined that the pl.s.a load is of capacitance nature due to pl.s.a sheath and that it is equivalent to a circuit element consisting of parallel capacitance and resistance. At l.s., we point out the remaining problems and future development of the pulsed-bias arc deposition technique.

关键词： arc deposition pulsed bias pl.s.a

THE EFFECTs OF PUlsE BIAs VOlTAGE AND N_2 PARTIAl PREssURE ON TiAlN FIl.s.OF ARC ION PlATING (AIP)

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Acta Metallurgica sinica(Engl.s. letters) 2001年第6期14卷 520-524页

作者： M.s. li, s.l. Zhu, Fuhui Wang, C. sun and l.s. wen (Institute of Metal Research, The Chinese Academy of sciences, shenyang l10016, China)

Owing to the characteristics of arc ion plating(AIP) technique, the structure and composition of TiAlN fil.s.can be tailored by controlling of various parameters such as compositions of target materials, N2 partial pressure, substrate bias and so on. In this study, several titanium aluminum nitride fil.s.were deposited on 1Cr11Ni2W2MoV steel for compressor blade of areo-engine under different d.c pulse bias voltage and nitrogen partial pressure. The effects of substrate pulse bias and nitrogen partial pressure on the deposition rate, droplet formation, microstruture and elemental component of the fil.s.were investigated.

关键词： TiAlN film pulse bias voltage nitrogen partial pressure arc ion plating

Four late-type Galaxies with Double Radio lobes and Properties of such Galaxies

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Research in Astronomy and Astrophysics 2024年第4期24卷 84-90页

作者： Z.s.Yuan X.Y.Gao Z.l.wen J.l.Han National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China CAs Key laboratory of FAsT National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China school of Astronomy and space sciences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanism for radio lobes from late-type galaxies is not fully *** sampl.s.are desired for a thorough investigation and *** utilizing the optical data from the newly released Dark Energy spectroscopic Instrument imaging surveys and the radio sources from the NRAO VlA sky survey and the Faint Images of the Radio sky at Twenty-centimeter,we identify four late-type Galaxies with double Radio lobes(la GRls):J0217-3645,J0947+6220,J1412+3723 and J1736+*** previously known la GRls,we confirm the correlation between radio power P_(1.4GHz)and stellar mass M_(*)of host ***(25/35)la GRls belong to the blue cloud galaxies,while the newly identified cases in this work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offset from the P_(1.4GHz)-M_(*)relation,and the galaxy color,indicating that bluer galaxies at a fixed M_(*)tend to host more powerful radio ***,the majority(31/36)of la GRls are either located in a galaxy group or displaying a disturbed *** suggest that all of the galaxy mass,color and surrounding environment could play important rol.s.in triggering radio lobes in late-type galaxies.

关键词： galaxies:active galaxies:jets galaxies:spiral radio continuum:galaxies

OBsERVATION ON DEFECTs IN POlYCRYsTAllINE sIlICON THIN FIlMs

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Acta Metallurgica sinica(Engl.s. letters) 2005年第3期18卷 295-299页

作者： Y.F. Hu1), H. shen2), l. Wang3), Z.C. liang3), Z.Y. liu1) and l.s. wen1) 1) College of Mechanical Engineering, south China University of Technology, Guan gzhou 510640, China 2) The school of Physics and Engineering, Zhongshan University, Guangzhou 510275 , China 3) Guangzhou Institute of Energy Conversion, The Chinese Academy of sciences, G uangzhou 510640, China College of Mechanical Engineering South China University of Technology Guangzhou 510640 China school of Physics and Engineering Zhongshan University Guangzhou 510275 China Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China

Polycrystalline silicon thin fil.s.were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several.s.bstrates such as ssP (silicon sheet from powder) ribbon, poly-si wafer and mono-si wafer. Intra-granular defects such as stacking faul.s. twins and microstructure defects were investigated on thin fil ms by scan electron microscopy (sEM) technique.

关键词： poly-si thin film intra-granular defects surface cross-section

Macrocyclic peptides:up-and-coming weapons to combat antimicrobial resistance

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signal Transduction and Targeted Therapy 2024年第5期9卷 1786-1787页

作者： wen-Jing Wang Xiang-Min Dong Guo-Bo l Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduSichuanChina Key laboratory of Drug Targeting and Drug Delivery system of Ministry of Education Department of Medicinal ChemistryWest China School of PharmacySichuan UniversityChengduSichuanChina

Recently,two companion papers publ.s.ed in Nature reported a first-in-cl.s. tethered macrocyclic peptide antibiotic targeting carbapenem-resistant ***(CRAB)and unveiled their unique antibacterial mechanism,which invol... 详细信息

关键词： outer macrocyclic Macrocyclic

Discovery of new MAX-phase-like layered ternary carbide V_(8)P_(6)C:Crystal.s.ructure,thermal expansion,and el.s.ic properties

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Journal of Materials science & Technology 2024年第7期174卷 55-62页

作者： H.X.Chen l.s.eng Z.l.Zhang X.C.wen D.l.Yang X.Y.Ye P.Q.Dai school of Materials science and Engineering Fujian University of TechnologyFuzhou 350118China Beijing synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian Provincial Key laboratory of Advanced Materials Processing and Application Fuzhou 350118China state Key laboratory of structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Due to the laminated structure,MAX phases and MAX-phase-like compounds possess outstanding dam-age tolerance capability with good thermal/electrical conductivity and other charming functional prop-erties,showing a bright future for structural-functional ***,a new MAX-phase-like ternary car-bide V_(8)P_(6)C with layered characteristics was *** to the alternate stacking of hexagonal-arranged M/A/X atom layers in MAX phases,V_(8)P_(6)C has a layered structure formed by a repeated stacking of the slabs consisting of V_(6)C-octahedrons and VP 6-distorted-octahedrons in three-atomic layers *** thermal expansion anisotropy was revealed,with the thermal expansion coefficients(TECs)along a-axis,c-axis,and the average value,equal toα_(a)=8.55(5)μK^(−1),α_(c)=10.23(5)μK^(−1),andα_(l)=9.14(5)μK^(−1),*** dilation along the c-axis was mainly dominated by out-plane V-P bonds be-tween layered *** to the pressure-dependent lattice parameters,the polycrystalline bulk modul.s.B_(0)=185(9)GPa)and high compressibility anisotropy factor(B_(a)/B_(c)=1.64)was ***-while,the second-order el.s.ic constants were calculated,and the el.s.ic moduli,E=303 GPa,B=198 GPa,G=122 GPa,andν=0.246,were *** the weak connection between layer slabs by out-plane V1-P bond was revealed by the bond stiffness model,with a bond stiffness cl.s. to the M-A bond in MAX ***,good damage tolerance capability was predicted according to Paugh’s ratio(G/B=0.616)and Cauchy pressure(P_(a)=0 GPa,P_(c)=-7.5 GPa),even better than those of typical MAX *** discovery of V_(8)P_(6)C provides a new member of MAX-phase-like damage-tolerant ceramic with relatively low density,moderate thermal expansion,and anisotropic compressibility,and the unique lay-ered structure is inspiring for exploring new layered ternary ceramics.

关键词： New ternary carbide MAX phase Thermal expansion El.s.ic constants Anisotropy

state of the art of lightweight aggregates used in lightweight refractories for working lining of high-temperature furnaces

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Journal of Iron and steel Research International 2024年第6期31卷 1320-1343页

作者： Wei Zhang wen-yong Dai shenyang National laboratory for Materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Research and Development Department AGC Plibrico(Dalian)Industries Inc.Dalian 116600LiaoningChina

lightweight refractories for the working lining of high-temperature furnaces play an important role in the smelting of advanced steels and *** prepare lightweight refractories for the working lining of high-temperature furnaces,the synthesis of lightweight aggregates is the ***,the research on the synthesis of lightweight aggregates with high service temperature,low thermal conductivity,high strength,and good slag resistance has received widespread *** available literature on the synthesis of lightweight aggregates was summarized,including corundum,mullite,mullite-corundum,spinel,corundum-spinel,cordierite,cordierite-mullite,calcium hexaluminate,corundum-calcium hexaluminate,bauxite,magnesia,magnesia-based,and forsterite-based ***,the future development trend of lightweight aggregates was proposed.

关键词： lightweight aggregate lightweight refractory Working lining Apparent porosity Cl.s.d porosity Thermal conductivity Pore-forming approach

A combined liouville integrable hierarchy associated with a fourth-order matrix spectral problem

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Communications in Theoretical Physics 2024年第7期76卷 1-8页

作者： wen-Xiu Ma Department of Mathematics Zhejiang Normal UniversityJinhua 321004China Department of Mathematics King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics and statistics University of South Florida TampaFL 33620-5700United States of America Material.s.ience Innovation and Modelling Department of Mathematical SciencesNorth-West UniversityMafikeng CampusMmabatho 2735South Africa

This paper aims to propose a fourth-order matrix spectral problem involving four potentials and generate an associated liouville integrable hierarchy via the zero curvature formulation.A bi-Hamiltonian formulation is furnished by applying the trace identity and a recursion operator is explicitly worked out,which exhibits the liouville integrability of each model in the resulting *** specific exampl.s.consisting of novel generalized combined nonlinear schrodinger equations and modified Korteweg-de Vries equations,are given.

关键词： integrable hierarchy Hamiltonian structure zero curvature equation lax pair matrix spectral problem

Geochemical identification of a source rock affected by migrated hydrocarbons and its geological.s.gnificance:Fengcheng Formation,southern Mahu sag,Junggar Basin,NW China

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Petroleum science 2024年第1期21卷 100-114页

作者： wen-long Dang Gang Gao Xin-Cai You Ke-Ting Fan Jun Wu De-wen lei wen-Jun He Yong Tang state Key laboratory of Petroleum Resource and Prospecting China University of Petroleum(Beijing)Beijing102249China school of Geosciences China University of Petroleum(Beijing)Beijing102249China Exploration&Development Institute Xinjiang Oil Field CompanyKaramay834000XinjiangChina

The Fengcheng Formation is a crucial.s.urce rock and the primary reservoir for oil accumulation in the Mahu *** oils are distributed throughout the Fengcheng Formation,ranging from the edge to the interior of the sag in the southern Mahu *** crude oils originate from in-situ source rocks in shallowly buried areas and the inner deep *** migration,the crude oil from the inner deep sag affects the source rocks cl.s. to carrier beds,leading to changes in the organic geochemical characteristics of the source *** changes might alter source rock evaluations and oil.s.urce *** on data such as total organic carbon(TOC),Rock-Eval pyrol.s.s of source rocks,and gas chromatography-mass spectrometry(GC-Ms)of the saturated fraction,and considering the geological characteristics of the study area,we define the identification characteristics of source rock affected by migrated hydrocarbons and establ.s. the various patterns of influence that migrated hydrocarbons have on the source rock of the Fengcheng Formation in the southern Mahu *** source rocks of the Fengcheng Formation are mostly fair to good,containing mainly Type II organic matter and being thermally mature enough to generate *** rocks affected by migrated hydrocarbons exhibit relatively high hydrocarbon contents(s1/TOC>110 mg HC/g TOC,Extract/TOC>30%,HC:hydrocarbon),relatively low Rock-Eval Tmax values,and relatively high tricyclic terpane contents with a descending and mountain-shaped ***,biomarker composition parameters indicate a higher thermal maturity than in-situ source *** a comparison of the extract biomarker fingerprints of adjacent reservoirs and mudstones in different borehol.s.three types of influence patterns of migrated hydrocarbons are identified:the edge-influence of thin sandstone-thick mudstone,the mixed-influence of sandstone-mudstone interbedded,and the full-influence of thick sandstone-thin *** finding reminds

关键词： Organic geochemistry source rock Influence of migrated hydrocarbons Fengcheng Formation southern Mahu sag