|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effect of trace Ni addition on microstructure,mechanical and corrosion properties of the extruded Mg-Gd-Y-Zr-Ni alloys for dissoluble fracturing tools显示文摘Magnesium alloys,a novel functional material for the fabrication of fracturing tools,are being paid more and more attentions recently due to their relatively high mechanical properties and fast dissolubility ability after fracturing.In this study,the novel extruded Mg-10Gd-3Y-0.3Zr-xNi alloys will be reported and their microstructure,mechanical and corrosion behaviors will be also studied.The results show that Ni contents influence phase precipitation behaviors.With adding 0.2 wt%Ni,a large amount of Zr_(7)Ni_(10)phases will be precipitated insidesα-Mg matrix,directly leading to degradation of strength and large corrosion rate.With further increasing Ni contents,the precipitation phases can be changed from Mg_(5)RE to 18R-LPSO structure,resulting in higher mechanical properties and faster corrosion rate.Moreover,adding Ni element also change the texture orientation by influencing the precipitation behavior of the alloys.The alloys invented in this paper have attained the highest compressive and tensile properties among all the reported dissoluble magnesium alloys.This work is beneficial in understanding the role of Ni in the magnesium alloys and provides more materials alternatives for the fabrication of dissoluble fracturing tools. | J.Wang T.Li H.X.Li Y.Z.Ma K.N.Zhao C.L.Yang J.S.Zhang | 2021 | Journal of Magnesium and Alloys2021，9，5： | 6 |
| 2 | A novel Mg-Gd-Y-Zn-Cu-Ni alloy with excellent combination of strength and dissolution via peak-aging treatment显示文摘Inferior absolute strength and dissolution properties are the main bottlenecks for the widespread application of dissolvable magnesium alloys in complex working environments for unconventional oil and gas resources.Here,a novel functional peak-aged Mg-9.5Gd-2.7Y-0.9Zn-0.8Cu-0.4Ni(wt.%) alloy for fracturing tools is reported,and it possesses an ultimate tensile strength of 457.6 MPa,ultimate compressive strength of 620.7 MPa and dissolution rate of ~43.7 mg·cm^(-2)·h^(-1) in 3 wt.% KCl solutions at 93℃.The excellent strength of the agedalloy is primarily attributed to the combination of grain refinement,long-period stacking ordered(LPSO) strengthening,and precipitation strengthening induced by stacking fault and β’ phase,among which the precipitation strengthening is dominant.Further investigations confirm that the corrosion is triggered from the micro-galvanic coupling between the Mg matrix and the cathodic lamellar and block LPSO phases.Strip-shaped corrosion pits along with LPSO phases are subsequently formed,significantly accelerating corrosion.The β’ precipitates can effectively improve the strength without compromising the dissolution rate because of their nanoscale size.This study provides an excellent material selection for dissolvable fracturing tools and presents a strategy by which a synergistic combination of strength and dissolution rate is achieved via peak-aging treatment. | Y.H.Liu Z.R.Zhang J.Wang Y.Li H.X.Li L.Y.Jia J.H.Wang J.S.Zhang | 2023 | Journal of Magnesium and Alloys2023，11，2： | 1 |
| 3 | The high-energy particle package onboard CSES显示文摘Introduction The China Seismo-Electromagnetic Satellite(CSES)aims to monitor space electromagnetic fields,ionospheric plasma,high-energy charged particles and other features of the global space environment.The high-energy particle package(HEPP),which can effectively detect the energy spectrum,flux and pitch angle distribution of space electrons and protons,and soft X-ray emission from solar flares,is one of the main payloads of CSES.Purposes and methods In this study,we designed,developed and calibrated the high-energy particle package and launched it into orbit with CSES.HEPP consists of the high-energy detector(HEPP-H),the low-energy detector(HEPP-L),and the solar X-ray monitor(HEPP-X).The three sub-detectors mainly use silicon detector and crystal calorimeter detection technology.Before launching,we calibrated the three sub-detectors in detail by using radiation source and accelerator beam.Results All the three sub-detectors have good energy linearity.After launching into orbit,the space energetic particles and X-ray distribution detected by HEPP are consistent with expectations.The performance indices of the detector reach the advanced level of the same kind of detector in the world.Conclusions HEPP has a wide energy detection range,good energy resolution and high angular resolution ability for electrons and protons.It will play an important role in the study of space particle response and space physics of seismic activity. | X.Q.Li Y.B.Xu Z.H.An X.H.Liang P.Wang X.Y.Zhao H.Y.Wang H.Lu Y.Q.Ma X.H.Shen X.Y.Wen H.Wang D.L.Zhang F.Shi W.X.Peng M.Gao X.X.Yu J.Z.Wang Y.J.Zhang J.L.Zhang J.Zhang H.X.Li J.R.Zeng Y.F.Nan | 2019 | Radiation Detection Technology and Methods2019，3，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员