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| 1 | Enhanced localized and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel in high-concentration hydrochloric acid solutions at room temperature显示文摘The localized and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel(NC-304 SS)produced by severe rolling technique, and its conventional polycrystalline 304 stainless steel(CC-304 SS)counterpart, were investigated in high-concentration hydrochloric acid solutions at room temperature.NC-304 SS can scarcely suffer from localized corrosion in 4 mol/L and 5 mol/L HCl solutions during 5-day immersion tests, and in 1-3 mol/L HCl solutions during thirty-five-day immersion tests. The corrosion rate of NC-304 SS was also less than that of CC-304 SS during these immersion tests. The improved localized and uniform corrosion resistances of NC-304 SS were explained in terms of the adsorption and chemical activity of Cl^-on NC-304 SS and CC-304 SS characterized by X-ray photoelectron spectroscopy,and the valence electron configurations of NC-304 SS and CC-304 SS were characterized by ultra-violet photoelectron spectroscopy rather than conventional electrochemical results. | S.G.Wang M.Sun Y.H.Xu K.Long Z.D.Zhang | 2018 | Journal of Materials Science & Technology2018，34，12： | 4 |
| 2 | 查看详情显示文摘 | Y.W.Yin M.Raju W.J.Hu X.J.Weng K.Zou J.Zhu X.G.Li Z.D.Zhang and Qi Li | | 0，，04： | 1 |
| 3 | Magnetic Properties and Coercivity of MnGa Films Deposited on Different Substrates显示文摘MnGa films were grown by magnetron sputtering on thermally oxidized Si(Si/SiO_2) and glass substrates. Films grown on single-crystal Si(100) substrate with different underlayers were prepared for comparison. It is found that the Si/SiO_2 substrate is more suitable for growing high-coercivity MnGa films than the glass substrate, which is the result of the isolated-island-like growth. A coercivity of 9.7 kOe can be achieved for the 10 nm MnGa films grown on Si/SiO_2 substrate at substrate temperature T_S of 450 °C.Optimized experimental conditions are specified by changing the thickness of the MnGa films and the temperature of the substrates. | J.N.Feng W.Liu W.J.Gong X.G.Zhao D.Kim C.J.Choi Z.D.Zhang | 2017 | Journal of Materials Science & Technology2017，33，3： | 1 |
| 4 | Magnetic and Electrical Behavior of MnTe_(1-x)Sb_x Alloys显示文摘The structure,specific heat,magnetic and electrical properties of MnTe1-xSbx(x=0,0.1,0.15,0.2 and 0.25) alloys have been investigated.The MnTe1-xSbx alloys crystallize in a hexagonal NiAs-type structure,and the impurity of MnSb phase appears when x≥0.15.The MnTe0.9Sb0.1 compound exhibits ferrimagnetic behavior with hysteresis loops even at 350 K,showing that the magnetic properties of MnTe compound are very sensitive to little compositional change.The ferromagnetism in the MnTe1-xSbx alloys with higher Sb contents may be attributed to the impurity of MnSb phase.Energy dispersive X-ray spectroscopy analysis on the MnTe0.9Sb0.1 compound indicates that Sb is very difficult to dope into the lattice of MnTe.So the anomaly of resistivity at 300 K of MnTe0.9Sb0.1 and the peak of specific heat around 304 K of all the alloys are thought to be related with the antiferromagnetic interactions of MnTe-based lattice. | X.He Y.Q.Zhang Z.D.Zhang | 2011 | Journal of Materials Science & Technology2011，27，1： | 0 |
| 5 | Structure and topological transport in Pb-doping topological crystalline insulator SnTe(001)film显示文摘Topological crystalline insulator(TCI)as a new type of topological materials has attracted extensive research interests for its tunable topological properties.Due its symmetry topological protection essence,the structure investigation provides a solid basement for tuning its topological transport properties.On SrTiO3(111)substrate,the SnTe film was found to be epitaxial growth only along[001]while not[111]direction.The detailed structural study was performed and a structural model was proposed to elucidate epitaxial growth of the SnTe(001)film.The transport properties of SnTe(001)film were further investigated and a typical weak anti-localization effect was observed.By Pb-doping into SnTe,the bulk carriers were inhibited and its topological surface states were strengthened to induce the enhanced surface transport contribution.With tunable multiple transport channels from the even Dirac cones,the TCI SnTe film systems will have the potential application in future spintronics devices. | C.H.Yan F.Wei Y.Bai F.Wang A.Q.Zhang S.Ma W.Liu Z.D.Zhang | 2020 | Journal of Materials Science & Technology2020，44，9： | 0 |
| 6 | Magnetization reversal of antiferromagnetically coupled perpendicular anisotropy films driven by current显示文摘By inserting an ultrathin Pt layer at Co/Ru interface,we established antiferromagnetic coupling with outof-plane magnetization in Co/Ru/Co film stacks fabricated by sputtering.To achieve configuration suitable for free layer,the magnetic properties of the stacks have been investigated by changing the thickness of Co,Ru and Pt layers using an orthogonal wedges technique.It is found that magnetic properties for upper Co layer thinner than 0.5 nm are sensitive to little change in Ru thickness.Improving continuity of upper Co layer by slightly increasing the thickness can effectively increase the squareness of minor loop.The switching magnetization of synthetic antiferromagnetic(SAF) structure is achieved by DC current under an in-plane static magnetic field of ± 500 Oe.This structure is very promising for free layer in spintronic application. | X.T.Zhao Y.Q.Zhao W.Liu Z.M.Dai T.T.Wang X.G.Zhao Z.D.Zhang | 2018 | Journal of Materials Science & Technology2018，34，5： | 0 |
| 7 | A new scale for optimized cryogenic magnetocaloric effect in ErAl_2@Al_2O_3 nanocapsules显示文摘The Er Al_2@Al_2O_3nanocapsules with Er Al_2core and Al_2O_3shell were synthesized by modified arc-charge technique.The typical core-shell structure of the nanocapsules was confirmed by high resolution transmission electron microscopy and X-ray photoelectron spectroscopy.Transmission electron microscopy analysis shows the irregular sphere of the nanocapules with an average diameter of 26 nm.Magnetic investigation revealed the Curie temperature of Er Al_2@Al_2O_3nanocapsules at 20 K and the typical superparamagnetic behavior between blocking temperature and Curie temperature.Based on the blocking temperature and average diameter,the magnetocrystalline anisotropy constant of Er Al_2@Al_2O_3nanocapsules was estimated to illustrate the magnetic contribution to the-S_M.The large-S_Mof 14.25 J/(kg K)was obtained under 50 k Oe at 5 K.A vital parameterˇwas introduced in the present work to scale the optimized magnetic characteristics and the optimized mechanism was discussed in detail according to classical superparamagnetic theory.The results demonstrate that the optimal-S_Mwill be obtained when the magnetic parameterˇis close to the theoretical coefficient. | F.Wei S.Ma L.Yang Y.Feng J.Z.Wang A.Hua X.G.Zhao D.Y.Geng Z.D.Zhang | 2018 | Journal of Materials Science & Technology2018，34，5： | 0 |
| 8 | EFFECTS OF HDDR PROCESS ON STRUCTURE AND MAGNETIC PROPERTIES OF Nd(Fe,Ti)_(12)N_δ PREPARED BY MECHANICAL ALLOYING显示文摘The effects of the hydrogenation-disproportionation-desorption-recombination (HDDR) process on the structure and the magnetic properties of the mechanical alloying (MA) prepared Nd8Fe84 Ti8 alloy and its nitride counterpart have been studied in detail. It has been found that Nd(Fe, Ti)12Hδ is formed in the temperature range from 300 to 550°℃. The disproportionation is ready to start at 550°℃ and is complete at 960°℃.The desorption and the recombination are almost synchronized. The phase of Nd(Fe,Ti)7 is formed at 750°℃ during the HDDR treatment. With increasing temperature of HDDR process, the metastable structure of TbCu7 type is gradually transformed into the structure of ThMn12 type. The intrinsic coercivity and the maximum magnetic energy product increase with increasing temperature of HDDR process. | B.ZCui X.K.Sun X.G.Zhao W.Liu Q.F.Xiao T.Zhao Z.D.Zhang Y.C.Sui | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，1： | 0 |
| 9 | Magnetic and Transport Properties of Mn_(0.98)Cr_(0.02)Te Epitaxial Films Grown on Al_2O_3 Substrates显示文摘The epitaxial Mn_(0.98)Cr_(0.02)Te films on single crystal Al_2O_3(0001) substrates were prepared by pulsed laser deposition.The X-ray diffraction and scanning electron microscopy results showed that the good continuous epitaxial film was obtained with substrate temperature of 500 ℃.When the substrate temperature reached700 ℃,the film was island growth and the manganese oxides phase appeared.The temperature dependence of both the magnetization and electrical resistance showed a sharp rise at around 60 K due to the magnetoelastic coupling.The temperature dependence of the electrical resistance of Mn_(0.98)Cr_(0.02)Te provided evidence for a transition from the metallic to semiconducting state at 305 K due to the spin disorder scattering with a large contribution from the influence of magnon drag. | Z.H.Wang D.Y.Geng J.Li Y.B.Li Z.D.Zhang | 2014 | Journal of Materials Science & Technology2014，30，2： | 0 |
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