
Song LanChongqing Jiaotong University · Department of Materials Science and Engineering
Song Lan
Doctor of Philosophy
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15
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Publications
Publications (15)
Hydrophobic modification has been widely used to prepare waterproof concrete, but reduces mechanical stability of the concrete, thereby limiting its applications in engineering. Currently, ultra-high performance concrete (UHPC) is the focus of research, but UHPC modified by hydrophobic agents is rarely reported. In this paper, different amounts of...
Fe-6.5 wt.% Si nanocrystalline alloys with good magnetic softness were prepared by mechanical alloying at various milling times (0–12 h) via a high-energy ball mill. Elemental iron and silicon powders were used as raw materials. Structural evolution, particle size distribution, and magnetic properties were investigated for as-milled Fe-Si alloy pow...
A composite alloy, consisting of bulk metallic glass (BMG) and high entropy alloy (HEA), was prepared by suction casting method in argon atmosphere. This BMG/HEA composite has a nominal composition of (Zr59Ni21Al20)95(Ni2.1TiAlFeCrCo0.8)5. The as-cast composite alloy possesses both good mechanical properties and high corrosion resistance. The alloy...
A Fe79Mo10B10Cu1 nanocomposite alloy was prepared by rapid solidification processing and subsequent isothermal annealing of ribbons with 6 nm, α-Fe grains embedded in an amorphous matrix. The nanocrystalline alloy was then nitrided in a gas mixture of ammonia and hydrogen at 650 and 700 °C for varied time between 300 and 7200 s followed by quenchin...
Fe79MoxB20−xCu1 amorphous and nanocrystalline alloys (x = 2, 4, 6, 8 and 10) were studied to investigate the influence of Mo and B contents on crystallization, structural, and magnetic properties. Samples were prepared by rapid solidification of alloy ingots using a single wheel melt spinner. Primary and secondary crystallization temperatures incre...
As inductor technology advances, greater efficiency and smaller components demand new core materials. With recent developments of nanocrystalline magnetic materials, soft magnetic properties of these cores can be greatly improved. FeCo-based nanocrystalline magnetic alloys have resulted in good soft magnetic properties and high Curie temperatures;...
The dependence of coercivity on composition is an important factor for establishing optimized soft magnetic properties. In this study, we have used the random anisotropy and coherent rotation models to estimate the variation of coercivity with composition in (Co1-xNix)88Zr7B4Cu1 nanocomposite alloys. Our calculations that the magnetoelastic anisotr...
Presentation on MMM 2017 conference
Nanocrystalline soft magnetic materials come in many forms, including nanoparticles, nanowires, nanorods, nanostructured thin films, nanopatterned films, and nanocrystalline ribbons. This chapter discusses the following nanostructured materials: zero-dimensional nanoparticles, one-dimensional nanorods and nanowires, two-dimensional thin films, and...
We have synthesized the antiferromagnetic mineral ulvospinel, Fe2TiO4, in Ar to assess the role of inert atmosphere on phase formation and magnetic properties. We report the role of atmosphere on a possible phase transition and the magnetic properties of this mineral. Atmosphere dependent transformations of ulvospinel are observed with increasing t...
Questions
Question (1)
As stated in the question, we want to deposit thin film using an iron target by magnetosputtering under argon atmosphere with a DC current source. But we couldn't even start the arc. The sputtering machine we used has a face-to-face geometry of target and substrate, where the substate is at top while the target at bottom. The target-substrate distance maintains ~92 mm. The parameter we've tried are sputtering power of 150 W and 300 W at an Argon pressure of 4 Pa, 6 Pa, 7 Pa, 8 Pa and 9 Pa, respectively.
We would like to ask for your knowledge on magnetosputtering and suggest a way to resolve this issue. Thank you.