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Effect of molybdenum content on the microstructure and corrosion behavior of FeCoCrNiMox high-entropy alloys

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Journal of Materials Science & Technology 2020年第11期42卷 64-73页

作者： Chunduo Dai tianliang zhao Cuiwei Du Zhiyong Liu Dawei Zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Key Laboratory for Corrosion and Protection of The Ministry of Education(MOE) Beijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Materials Genome Institute of Shanghai University Shanghai 200444China

The effect of Mo content on the microstructure revolution and corrosion behavior of cast FeCoCrNiMox high-entropy alloys in chloride environments were *** indicate that FeCoCrNi and FeCoCrNiMo0.1 alloys are in single FCC solid *** precipitates form in FeCoCrNiMo0.3 and increase in FeCoCrNiMo0.6 *** occurs on FeCoCrNi and FeCoCrNiMo0.1 alloys while FeCoCrNiMo0.3 and FeCoCrNiMo0.6 alloys suffer from preferential localized corrosion at the regions depleted in Cr and *** higher Cr2O3/Cr(OH)3 ratio and the incorporation of Mo oxides make the passive film more protective and the corrosion resistance of the FeCoCrNiMo0.1 alloy is thus *** correlation between microstructure and corrosion behavior and the corresponding corrosion mechanism were clarified.

关键词： High-entropy alloys Corrosion behavior Precipitate

Extreme precipitation events in East China and associated moisture transport pathways

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Science China Earth Sciences 2016年第9期59卷 1854-1872页

作者： zhao Yang XU XiangDe zhao tianliang XU HongXiong MAO Fei SUN Han WANG YuHong State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Beijing 100081 China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science & Technology Nanjing 210044 China Institute of Ecological Environment and Agricultural Meteorology Chinese Academy of Meteorological Sciences Beijing 100081 China Guangxi Institute of Meteorological Disaster Mitigation Nanning 530022 China

Interannual variation of summer precipitation in East China, and frequency of rainstorms during the monsoon season from 1961 to 2010, are analyzed in this study. It is found that the two variables show opposite trends on a decadal time scale: frequency of rainstorms increases significantly after the 1990 s, while summer precipitation in East China decreases during the same period. Analysis of the spatial distribution of summer rainstorm frequency from 1961 to 2010 indicates that it decreases from the southeast to the northwest at the east edge of the large-scale topography associated with the plateaus. Spatial distribution of rainstorms with daily rainfall greater than 50 mm is characterized by a "high in the southeast and low in the northwest" pattern, similar to the staircase distribution of the topography. However, the spatial distribution of variation in both summer precipitation and frequency of extreme rainstorms under global warming differs significantly from the three-step staircase topography. It is shown that moisture characteristics of summer precipitation and extreme rainstorms during the monsoon season in East China, including moisture transport pathways, moist flow pattern, and spatial structure of the merging area of moist flows, differ significantly. Areas of frequent rainstorms include the Yangtze River Valley and South China. Column-integrated moisture transport and its spatial structure could be summarized as a "merging" of three branches of intense moist flows from low and middle latitude oceans, and "convergence" of column-integrated moisture fluxes. The merging area for moist flow associated with rainstorms in the high frequency region is located slightly to the south of the monsoonal precipitation or non-rainstorm precipitation, with significantly strong moisture convergence. In addition, the summer moist flow pattern in East China has a great influence on the frequency of extreme rainstorms. Moisture flux vectors in the region of frequent rai

关键词： Frequency of rainstorms Moisture transport Synoptic circulation Extreme rainstorms Synchronized variations Vortex structure

Dust direct radiative effects on the earth-atmosphere system over east Asia:Early spring cooling and late spring warming

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Chinese Science Bulletin 2011年第10期56卷 1020-1030页

作者： WANG Hong zhao tianliang ZHANG XiaoYe GONG SunLing Centre for Atmosphere Watch and Services Chinese Academy of Meteorological Sciences Beijing 100081 China Air Quality Research Division Science & Technology Branch Environment Canada Toronto Ontario M3H 5T4 Canada

Focusing on three dust storms occurring in spring 2001,we developed a detailed aerosol parameterization scheme and integrated it in a radiative transfer model to characterize possible impacts of solar altitude angle on dust direct radiative effects over China desert regions and the North Pacific,using actual daily solar altitude *** solar altitude angle from early spring (or winter) to late spring (or summer) leads to increase of positive clear sky radiative forcing,and decrease of negative radiative forcing due to dust aerosols at the top of the *** solar altitude angle increases from early to late spring,dust-clear sky radiative forcing may change from negative to positive at the top of atmosphere,showing a change from cooling to heating of the earth-atmosphere system over high-albedo deserts and nearby *** low-albedo ocean negative clear sky radiative forcing by dust may decrease,suggesting a change from strong to weak cooling on the earth-atmosphere *** impacts of solar altitude angle on cloudy sky radiative forcing due to dust are similar to those of clear *** of low cloud on dust radiative forcing are the same as increasing surface *** causes the transition of dust cooling effects into heating effects over deserts to occur earlier,and causes decrease of negative radiative forcing over the ocean and even cause a change from weak negative radiative forcing to weak positive forcing over local *** in the same East Asian desert regions and nearby areas,the strength and sign of the radiative forcings depend on storm dates and thus solar altitude *** nearer to early spring (or winter) a dust storm occurs,the easier it leads to negative radiative forcing at the top of atmosphere,which indicates cooling effects on the earth-atmosphere *** contrast,the nearer to late spring (or summer) a dust storm occurs,the easier it leads to positive radiative forcing at the top of atmosphere,showing heat

关键词：大气系统辐射效应冷却效果东亚地区气候变暖粉尘层地球早春

Corrosion of ancient Chinese bronze fragments from different periods and protective effect of menthol coating

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Corrosion Communications 2023年第4期12卷 46-57页

作者： tianliang zhao Lu zhao Yujun Feng Qun Luo Jiarang Zhong Qian Li State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai University Collaborative Innovation Center for Advanced Steels Wuhan University of Science and Technology Materials Genome Institute Shanghai University Shanxi Museum National Engineering Research Center for Magnesium Alloy Chongqing University

Chinese ancient bronze fragments from three periods of history were investigated in terms of the characteristics of substrate and patina. The non-destructive protective effect of menthol coating was verified. Patinas on the fragments of the Spring and Autumn period, Warring State period, and Han Dynasty all contain the major components CuCl2·3Cu（OH）2and Cu2（OH）2CO3. The residual components, some oxides and chlorides of Pb and Sn,show no evident distribution trend in the patinas except PbCl2is segregated beneath the patina of the Han dynasty fragment. Menthol coating shows a consistently protective ability for these patinated fragments. However,its sublimation is strongly affected by ambient temperature and relative humidity（RH）. Menthol coating with an initial thickness of ～500 μm could effectively protect the fragments for 328 h under 23℃ with 54% RH while for only 42 and 2 h respectively under 25℃ with 100% RH and 35℃ with 100% RH.

关键词： Bronze protection Patina Menthol coating Corrosion

Recent Enhanced Deep Troposphere-to-Stratosphere Air Mass Transport Accompanying the Weakening Asian Monsoon

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Journal of Meteorological Research 2024年第4期38卷 708-719页

作者： Bin CHEN Jianzhong MA Wei ZHANG Jianchun BIAN tianliang zhao Xiangde XU State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing100081China Department of Plants Soils and ClimateUtah State UniversityUT84322USA Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&TechnologyNanjing 210044China

The Asian monsoon(AM) region is a well-known region with prevailing stratosphere–troposphere exchange(STE).However,how the STE across this region changes with the weakening AM remains ***,we particularly diagnose the air mass transport between the planetary boundary layer(PBL) and the stratosphere over the AM region during 1992–2017 using the Lagrangian particle dispersion model FLEXPART based on the ERA-Interim reanalysis *** results show that both the downward and upward deep STEs exhibit a detectable increasing trend,while the latter,namely,the deep troposphere-to-stratosphere transport(DTST),is relatively more *** analysis reveals that the long-term trend of DTST over the AM region could be partly attributed to changes in the Pacific Walker circulation and the air temperature(especially at upper levels).Additionally,it is found that DTST increases markedly over the tropical oceanic regions,while the increasing DTST into the stratosphere can be attributed to the enhanced air masses originated from the PBL over the terrestrial regions,where large amounts of pollutant emissions *** results imply that the influence of the DTST on the chemical composition and the climate of the stratosphere over the AM region is expected to become increasingly important,and is thereby of relevance to climate projection in an evolving climate.

关键词： stratosphere–troposphere exchange(STE) air mass transport deep troposphere-to-stratosphere transport(DTST) Asian monsoon(AM) pollution

Facies Architecture Model of the Shimentan Formation Pyroclastic Rocks in the Block-T Units, Xihu Sag, East China Sea Basin, and its Exploration Significance

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1076-1087页

作者： DAI Xiaojuan TANG Huafeng ZHANG Tao zhao Pengjiu XU Chunming KONG Tan zhao tianliang WANG Pujun Collegeof Earth Sciences Jilin UniversityChangchun130061China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Land and ResourcesChangchun 130061China Key Lab for Evolution of Past life and Environment in Northeast Asia Ministry of EducationChangchun 130026China Shanghai Branch of CNOOC Ltd. Shanghai 200030China

A gas field consisting of volcanic reservoir rocks was discovered in the block-T units of the Xihu Sag,East China Sea *** lithology of the volcanic rocks is dominated by tuff and reworked *** lithofacies are dominated by base surge deposits of explosive *** the architecture model of volcanic facies is still uncertain,it has restricted the exploration and development of mineral resources in this *** core and cuttings data,the lithology,lithofacies,geochemistry as well as grain size characteristics of volcanic rocks were *** on these analyses,the volcanic rocks in the well section are divided into three eruptive *** transport direction of each volcanic eruption is analyzed using crystal fragment size *** facies architecture of the block-T units was established based on the reconstruction results of *** results show that the drilling reveals proximal facies(PF)and distal facies(DF)of the volcanic ***,the crater-near crater facies(CNCF)are not *** with the reservoirs of the Songliao Basin,it is shown that the volcanic rocks in the Xihu Sag have good exploration potential;a favorable target area is the CNCF near the contemporaneous fault.

关键词： volcanic rocks Shimentan Formation facies architecture eruptive stage East China Sea Basin

Distribution and Formation Causes of PM_(2.5) and O_(3) Double High Pollution Events in China during 2013–20

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Advances in Atmospheric Sciences 2024年第6期41卷 1235-1250,I0004-I0021页

作者： Zhixuan TONG Yingying YAN Shaofei KONG Jintai LIN Nan CHEN Bo ZHU Jing MA tianliang zhao Shihua QI Department of Atmospheric Science School of Environmental SciencesChina University of GeosciencesWuhan 430074China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Research Centre for Complex Air Pollution of Hubei Province Wuhan 430074China Laboratory for Climate and Ocean–Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China Eco-Environmental Monitoring Centre of Hubei Province Wuhan 430074China Key Laboratory of Atmospheric Chemistry China Meteorological AdministrationBeijing 100081China School of Atmospheric Physics Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China

Fine particulate matter(PM_(2.5))and ozone(O_(3))double high pollution(DHP)events have occurred frequently over China in recent years,but their causes are not completely *** this study,the spatiotemporal distribution of DHP events in China during 2013–20 is *** synoptic types affecting DHP events are identified with the Lamb–Jenkinson circulation classification *** meteorological and chemical causes of DHP events controlled by the main synoptic types are further *** show that DHP events(1655 in total for China during 2013–20)mainly occur over the North China Plain,Yangtze River Delta,Pearl River Delta,Sichuan Basin,and Central *** occurrence frequency increases by 5.1%during 2013–15,and then decreases by 56.1%during 2015–*** main circulation types of DHP events are“cyclone”and“anticyclone”,accounting for over 40%of all DHP events over five main polluted regions in China,followed by southerly or easterly flat airflow types,like“southeast”,“southwest”,and“east”.Compared with non-DHP events,DHP events are characterized by static or weak wind,high temperature(20.9℃ versus 23.1℃)and low humidity(70.0%versus 64.9%).The diurnal cycles of meteorological conditions cause PM_(2.5)(0300–1200 LST,Local Standard Time=UTC+8 hours)and O_(3)(1500–2100 LST)to exceed the national standards at different periods of the DHP *** pollutant conversion indices further indicate the rapid secondary conversions during DHP events,and thus the concentrations of NO_(2),SO_(2) and volatile organic compounds decrease by 13.1%,4.7%and 4.4%,*** results of this study can be informative for future decisions on the management of DHP events.

关键词： double high pollution events PM_(2.5) ozone spatiotemporal distribution meteorological causes chemical composition characteristics

Characterization of the aerosol chemical composition during the COVID-19 lockdown period in Suzhou in the Yangtze River Delta,China

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Journal of Environmental Sciences 2021年第4期33卷 110-122页

作者： Honglei Wang Qing Miao Lijuan Shen Qian Yang Yezheng Wu Heng Wei Yan Yin tianliang zhao Bin Zhu Wen Lu Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&TechnologyNanjing 210044China Suzhou Environmental Monitoring Center Suzhou 215000China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

To control the spread of COVID-19,rigorous restrictions have been implemented in China,resulting in a great reduction in pollutant *** this study,we evaluated the air quality in the Yangtze River Delta during the COVID-19 lockdown period using satellite and ground-based data,including particle matter(PM),trace gases,water-soluble ions(WSIs) and black carbon(BC).We found that the impacts of lockdown policy on air quality cannot be accurately assessed using MODIS aerosol optical depth(AOD) data,whereas the tropospheric nitrogen dioxide(NO_(2)) vertical column density can well reflect the influences of these restrictions on human *** to the pre-COVID period,the PM_(2.5),PM_(10),NO_(2),carbon monoxide(CO),BC and WSIs during the lockdown in Suzhou were observed to decrease by 37.2%,38.3%,64.5%,26.1%,53.3% and 58.6%,respectively,while the sulfur dioxide(SO_(2)) and ozone(O_(3)) increased by 1.5% and 104.7%.The WSIs ranked in the order of NO_(3)~->NH_(4)^(+)>SO_(4)^(2-)>Cl~->Ca^(2+)>K^(+)>Mg^(2+)>Na + during the lockdown *** comparisons with the ion concentrations during the pre-COVID period,we found that the ions NO 3-,NH 4 +,SO_(4)^(2-),Cl~-,Ca^(2+),K^(+) and Na^(+) decreased by 66.3%,48.8%,52.9%,56.9%,57.9% and 76.3%,respectively,during the lockdown,in contrast to Mg^(2+),which increased by 30.2%.The lockdown policy was found to have great impacts on the diurnal variations of Cl~-,SO_(4)^(2-),Na^(+) and Ca^(2+).

关键词： COVID-19 Lockdown Satellite data Chemical composition Diurnal variation

Effect of Docetaxel and Cisplatin Chemotherapy Combined with Intensitymodulated Radiotherapy in the Treatment of Postoperative Recurrence of Esophageal Cancer and Its Effect on Serum Tumor Markers

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Advances in Modern Oncology Research 2020年第3期6卷 6-9页

作者： tianliang zhao Weinian Kang The People's Hospital of Zhangye City Zhangye CityGansu ProvinceChina The People's Hospital of Wuwei City Wuwei CityGansu ProvinceChina

Objective: To investigate the effect of docetaxel and cisplatin combined with intensity-modulated radiotherapy in thetreatment of postoperative recurrence of esophageal cancer and the content of tumor markers in serum. Methods: According tosimple randomization method, 60 patients with postoperative recurrence of esophageal cancer admitted from February 2018 toSeptember 2019 were divided into control group (n = 30 cases) and observation group (n = 30 cases). All patients received *** + cisplatin was used in the control group and docetaxel + cisplatin was used in the observation group. After 2 coursesof continuous treatment, the therapeutic effect, serum tumor marker content and adverse reactions were compared between thetwo groups. Results: After treatment, the effective rate of observation group was higher than control group, and the difference wasstatistically significant (P < 0.05).The contents of carcinoembryonic antigen (CEA), squamous cell carcinoma antigen (SCC) andcarbohydrate antigen 19-9 (CA19-9) in observation group were lower than those in control group, and the difference was statisticallysignificant (P < 0.05). The incidence of adverse reactions in the observation group was lower than that in the control group, and thedifference was statistically significant (P < 0.05). Conclusion: Docetaxel and cisplatin combined with intensemodulated radiotherapyfor postoperative recurrence of esophageal cancer can improve the therapeutic effect, inhibit the malignant degree of tumor, andreduce the incidence of adverse reactions.

关键词： Postoperative recurrence of esophageal cancer Fluorouracil Docetaxel Cisplatin Chemotherapy Radiation therapy