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Simultaneously enhancing the strength and ductility of as-extruded AlN/AZ91 composites via nano-precipitation and pyramidal slip

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Journal of Materials Science & Technology 2024年第5期172卷 240-254页

作者： Bin Zhang Yunxia Sun tuo liang Yunzhen Li Tian Li Jingchao Wang Ruiru Cai Changlin Yang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

Age hardening is often used to optimize the mechanical properties of as-deformed Mg-based materials in industry,whereas the improvement of strength is usually accompanied by the significant loss of ductility,which hinders the application of Mg-based materials in structural *** the present work,high strength-ductility synergy(the yield strength of 263±9 MPa,ultimate tensile strength of 398±7 MPa and elongation to fracture of 34%±1%)was realized in as-extruded AlN/AZ91 composites after optimiz-ing aging *** characterization shows that AlN particles induced a large number of geometrically necessary dislocations around the AlN/Mg interface during extrusion,which decreased the nucleation barrier and provided more heterogeneous nucleation sites forγ-Mg 17 Al 12 continuous ***,95%of residual dislocations in as-extruded AlN/AZ91 composites were annihilated dur-ing peak-aging,suppressing the growth and coarsening of continuous ***,high density of nano-sizedγ-Mg 17 Al 12 continuous precipitates was produced in as-extruded AlN/AZ91 composites af-ter *** tension,gliding dislocations bypassed sphericalγ-Mg 17 Al 12 nano-precipitates by Orowan looping rather than cutting mechanism,which induced a strong block on dislocation *** high yield strength was mainly attributed to the high density of non-shearableγ-Mg 17 Al 12 nano-precipitates with spherical morphology,which was different from other Mg-Al-based *** results of texture evolution and slip trace analysis demonstrated that the suppression of extension twinning and less basal slip was due to the enhanced activity of pyramidalc+aslip in as-extruded AlN/AZ91 com-posites after peak-aging during the room temperature tension,meanwhile,the dislocation density of as-extruded AlN/AZ91 composites was significantly decreased during peak-aging,then higher elongation to fracture was achieved.

关键词： Magnesium matrix composites Mechanical properties Precipitation Deformation mechanisms Non-basal slip

Prognostic impact of persistent atrial fibrillation in patients with heart failure

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中国循环杂志 2016年第Z1期31卷 -页

作者： Nini Liu Tianyi Gan Yuhui Zhang tuo liang Xuemei Zhao Jian Zhang Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical Colege Beijing China

A novel profile modification HPF-Co gel satisfied with fractured low permeability reservoirs in high temperature and high salinity

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Petroleum Science 2024年第1期21卷 683-693页

作者： Ya-Kai Li Ji-Rui Hou Wei-Peng Wu Ming Qu tuo liang Wei-Xin Zhong Yu-Chen Wen Hai-Tong Sun Yi-Nuo Pan China University of Petroleum Beijing Beijing102249China PetroChina Tarim Oilfield Company Korla 841000XinjiangChina Key Laboratory of Improving Oil and Gas Recovery of Ministry of Education Northeast Petroleum University Daqing 163318HeilongjiangChina Xi'an Shiyou University Xi'an 710065ShaanxiChina Northwest Oilfield Company SINOPECUrumqi 830011XinjiangChina

Conformance control and water plugging are a widely used EOR method in mature ***,majority of conformance control and water plugging agents are unavoidable dehydrated situation in high-temperature and high-salinity low permeability ***,a novel conformance control system HPF-Co gel,based on high-temperature stabilizer(CoCl_(2)·H_(2)O,CCH)is *** HPF-Co bulk gel has better performances with high temperature(120℃)and high salinity(1×10^(5)mg/L).According to Sydansk coding system,the gel strength of HPF-Co with CCH is increased to code *** dehydration rate of HPF-Co gel is 32.0%after aging for 150 d at 120℃,showing excellent thermal *** rheological properties of HPF gel and HPF-Co gel are also *** results show that the storage modulus(G′)of HPF-Co gel is always greater than that of HPF *** effect of CCH on the microstructure of the gel is *** results show that the HPF-Co gel with CCH has a denser gel network,and the diameter of the three-dimensional network skeleton is 1.5-3.5μ*** 90 d of aging,HPF-Co gel still has a good three-dimensional *** spectroscopy results show that CCH forms coordination bonds with N and O atoms in the gel amide group,which can suppress the vibration of cross-linked sites and improve the stability at high *** core plugging test determines the optimized polymer gel injection strategy and injection velocity with HPF-Co bulk gel system,plugging rate exceeding 98%.Moreover,the results of subsequent waterflooding recovery can be improved by 17%.

关键词： Low permeability reservoir High-temperature resistant gel Complexation reaction Polymer gel injection strategy Plugging rate Enhanced oil recovery

A novel polymer gel with high-temperature and high-salinity resistance for conformance control in carbonate reservoirs

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Petroleum Science 2022年第6期19卷 3159-3170页

作者： Wei-Peng Wu Ji-Rui Hou Ming Qu Yu-Long Yang Wei Zhang Wen-Ming Wu Yu-Chen Wen tuo liang Li-Xiao Xiao Unconventional Petroleum Research Institute China University of PetroleumBeijing102249China Sinopec Northwest Oilfield Company UrumqiXinjiang830000China

Plugging agents have been widely used to enhance oil recovery in fractured-vuggy carbonate ***,the harsh conditions of fractured-vuggy carbonate reservoirs yield a significant challenge in maintaining a long-term stabilization of plugging *** this work,we developed an anti-hightemperature and high-salinity polymer gel(APG)with excellent resistance to high temperature(140℃)and ultra-high salinity(240000 mg/L).The rheology and microstructure of APG were characterized before and after *** plugging tests on fractured cubic cores were conducted to quantify the plugging performance of the gel *** results showed that the Sclerglucan and Cobalt(Ⅱ)Chloride Hexahydrate filled the three-dimensional(3-D)network with various morphologies,providing extra protection to the cross-linking points of the 3D network structure of APG and thus,leading to a prolongation of the dehydration *** dehydration rate of APG was only 5%within 30days,and the strength of APG could be maintained at a rigid or near-rigid level over 150 ***,APG exhibited satisfactory shear and scour *** plugging tests showed that APG could achieve a plugging rate of 90%and demonstrate ignorable minor damage to the *** results indicate that APG can serve as a great candidate in channel plugging in fractured-vuggy carbonate reservoirs where fractures are fully developed.

关键词： Conformance control Fractured-vuggy reservoir High temperature High salinity Thermal stability

Utilization mechanism of foam flooding and distribution situation of residual oil in fractured-vuggy carbonate reservoirs

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Petroleum Science 2023年第3期20卷 1620-1639页

作者： Yu-Chen Wen Ji-Rui Hou Xiao-Li Xiao Chang-Ming Li Ming Qu Ya-jie Zhao Wei-Xin Zhong tuo liang Wei-Peng Wu Research Institute of Unconventional Petroleum Science and Technology China University of Petroleum(Beijing)Beijing102249China Key Laboratory of Petroleum Engineering China University of Petroleum(Bejing)Bejing102249China

The development of fractured-vuggy carbonate reservoirs is extremely difficult because of the complex fractured-vuggy structure and strong *** flooding is a potential enhanced oil recovery(EOR)technology in fractured-vuggy carbonate *** on the similarity criterion,three types of 2D visual physical models of the fractured-vuggy structure were made by laser ablation technique,and a 3D visual physical model of the fractured-vuggy reservoir was made by 3D printing *** the physical analog experiments of foam flooding were carried out in these *** experimental results show that foam can effectively improve the mobility ratio,control the flow velocity of the fluid in different directions,and sweep complex fracture *** effect of foam flooding in fractures can be improved by increasing foam strength and enhancing foam *** effect of foam flooding in vugs can be improved by reducing the density of the foam and the interfacial tension between foam and *** types of microscopic residual oil and three types of macroscopic residual oil can be displaced by foam *** study verifies the EOR of foam flooding in the fractured-vuggy reservoir and provides theoretical support for the application of foam flooding in fractured-vuggy reservoirs.

关键词： Fractured-vuggy reservoirs Foam flooding Physical model Residual oil Enhanced oil recovery(EOR)

Rational design of asymmetric atomic Ni-P1N3 active sites for promoting electrochemical CO_(2)reduction

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Nano Research 2023年第2期16卷 2170-2176页

作者： Ming Qu Zhe Chen Zhiyi Sun Danni Zhou Wenjing Xu Hao Tang Hongfei Gu tuo liang Pengfei Hu Guangwen Li Yu Wang Zhuo Chen Tao Wang Binbin Jia Unconventional Petroleum Research Institute China University of Petroleum(Beijing)Beijing 102249China Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Chemistry Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 102206China Research Institude of Petroleum Processing Sinopec Group(SINOPEC)Beijing 100083China Shanghai Synchrotron Radiation Facilities Shanghai Institute of Applied PhysicsChinese Academy of ScienceShanghai 201204China

The atomic-level interfacial regulation of single metal sites through heteroatom doping can significantly improve the characteristics of the catalyst and obtain surprising ***,nickel single-site catalysts(SSCs)with dual-coordinated phosphorus and nitrogen atoms were developed and confirmed(denoted as Ni-PxNy,x=1,2 and y=3,2).In CO_(2)reduction reaction(CO_(2)RR),the CO current density on Ni-PxNy was significantly higher than that of Ni-N4 catalyst without phosphorus ***,Ni-P1N3 performed the highest CO Faradaic efficiency(FECO)of 85.0%–98.0%over a wide potential range of−0.65 to−0.95 V(*** reversible hydrogen electrode(RHE)).Experimental and theoretical results revealed that the asymmetric Ni-P1N3 site was beneficial to CO_(2)intermediate adsorption/desorption,thereby accelerating the reaction kinetics and boosting CO_(2)RR *** work provides an effective method for preparing well-defined dual-coordinated SSCs to improve catalytic performance,targetting to CO_(2)RR applications.

关键词： nickel single-site catalysts asymmetric coordination CO_(2)reduction reaction atomic interface

Imbibition mechanisms of high temperature resistant microemulsion system in ultra-low permeability and tight reservoirs

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Petroleum Exploration and Development 2022年第6期49卷 1398-1410页

作者： XIAO Lixiao HOU Jirui WEN Yuchen QU Ming WANG Weiju WU Weipeng liang tuo Unconventional Petroleum Science and Technology Research Institute China University of Petroleum(Beijing)Beijing 102249China Key Laboratory of Petroleum Engineering Education MinistryChina University of Petroleum(Beijing)Beijing 102249China

Lower-phase microemulsions with core-shell structure were prepared by microemulsion dilution *** high temperature resistant systems were screened and the performance evaluation experiments were conducted to clarify the spontaneous imbibition mechanisms in ultra-low permeability and tight oil reservoirs,and to direct the field microfracture huff and puff test of oil *** microemulsion system(O-ME)with cationic-nonionic surfactant as hydrophilic shell,No.3 white oil as oil phase core has the highest imbibition recovery;its spontaneous imbibition mechanisms include:the ultra-low interfacial tension and wettability reversal significantly reduce oil adhesion work to improve oil displacement efficiency,the nanoscale“core-shell structure”formed can easily enter micro-nano pores and throats to expand the swept volume,in addition,the remarkable effect of dispersing and solubilizing crude oil can improve the mobility of crude *** on the experimental results,a microfracture huff and puff test of O-ME was carried out in Well YBD43-X506 of Shengli *** being treated,the well had a significant increase of daily fluid production to 5 tons from 1.4 tons,and an increase of daily oil production to 2.7 tons from 1.0 ton before treatment.

关键词： ultra-low permeability reservoir tight oil microemulsion imbibition mechanism oil displacement efficiency EOR

One-year outcomes of percutaneous renal denervation for thetreatment of resistant hypertension： the first Chinese experience

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Chinese Medical Journal 2014年第6期127卷 1003-1007页

作者： Dong Hui Jiang Xiongjing liang tuo Zou Yubao Guan Ting Peng Meng Song Lei Department of Cardiology State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Disease Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background As a novel device-based approach targeting the renal sympathetic nerves, percutaneous renal denervation(RDN) has been shown to be effective and safe for reducing blood pressure. However, while considerable data on RDN have been obtained from Western populations, there is limited findings from East Asian populations. The purpose of this study was to evaluate one-year outcomes of RDN for the treatment of resistant hypertension in Chinese patients. Methods Between February and August 2012, 14 patients(mean age 39±8 years, 10 males) with resistant hypertension underwent successful RDN at the Fuwai Hospital. All 14 patients were followed up at 1, 3, 6 and 12 months postprocedure. Blood pressure, use of antihypertensive agents, renal function, and complications were *** Baseline values included mean office blood pressure of 164/103±14/10 mmHg, mean 3.9±0.6 anti-hypertensive agents, and an estimated glomerular filtration rate of(79±19) ml min-1 1.73 m-2. Office blood pressure after the procedure was reduced by –14/–10, –17/–11, –21/–12, and –24/–14 mmHg at 1, 3, 6, and 12 months respectively, and the reduction of the number of antihypertensive agents at the above corresponding time points was-1.3,-1.5,-1.7 and-1.8 respectively(all P 0.05). No clinical complications were observed at 12-month follow-up. Conclusion This study showed that RDN seems to be effective in reducing blood pressure of Chinese patients with resistant hypertension, with minimal adverse events at 12-month follow-up.

关键词： renal denervation hypertension resistant to conventional therapy clinical outcomes

Plasma neutrophil gelatinase-associated lipocalin (NGAL) predicts renal function in hospitalized patients with heart failure

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中国循环杂志 2016年第Z1期31卷 -页

作者： Xuemei Zhao Tianyi Gan tuo liang Nini Liu Junxia Cheng Yiran Hu Heart Failure Center Fuwai Hospital State Key Laboratory of Cardiovascular Disease National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical Colege Beijing China