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| 1 | The characterization of Fe-rich phases in a high-pressure die cast hypoeutectic aluminum-silicon alloy显示文摘Both microstructural characteristics and fracture behavior of Fe-rich phases in a high-pressure die-cast hypoeutectic Al-Si alloy were investigated.Attention was focused on the morphology and formation mechanism of Fe-rich phases,together with their influence on fracture.Results show that primary Ferich phases exhibited in blocky shape precipitated from liquid while secondary Fe-rich phase in a large net shape was distributed along eutectic boundary participating in a ternary eutectic reaction.Through synchrotron X-ray tomography characterization,three Fe-rich phases with different morphologies,i.e.,polyhedral shape,fine compact shape and Chinese script-type shape were extracted along the radial direction.Lower slow-shot speed promoted the polyhedral Fe-rich phase to precipitate in slow-shot sleeve while decreased the formation of fine compact and Chinese script-type Fe-rich phases in die cavity.Because of a worse deformation compatibility,polyhedral Fe-rich phases fractured and became stress concentration sources before the failure of the casting. | X.Y.Jiao C.F.Liu Z.P.Guo G.D.Tong S.L.Ma Y.Bi Y.F.Zhang S.M.Xiong | 2020 | Journal of Materials Science & Technology2020，47，16： | 1 |
| 2 | The Impact of Nanocomposite Materials on Lithium Ion Batteries显示文摘1 Results Lithiumion batteries have become the power source of choice for consumer electronic devices such as cell phones and laptop computers due to their high energy density and long cycle life. In addition,lithium-ion batteries are expected to be a major breakthrough in the hybrid vehicle field.Despite their successful commercial application,further performance improvement of the lithium ion battery is still required.Nanomaterials and nanotechnologies can lead to a new generation of lithium secondary... | Z.P.Guo S.H.Ng Z.W.Zhao K.Konstantinov H.K.Liu | 2007 | 复旦学报(自然科学版)2007，46，5： | 0 |
| 3 | Mesoporous Carbon-Tin Nanocomposites as Anode Materials for Li-ion Battery显示文摘A new mesoporous carbon-tin(MC-Sn)nanocomposite has been successfully prepared via a two-step method. From the transmission electron microscopy(TEM)observations,the tin nanoparticles were decorated on the as-prepared mesoporous carbons.The mesoprous structure of the carbon can effectively buffer the volume changes during the Li-Sn alloying and de-alloying cycles.The as-prepared MC/Sn nanocomposite electrodes exhibited extremely good cycling stability,with the specific capacity of Sn in the composite electrode calculated to be 959.7 mAh·g^(-1),which amounts to an impressive 96.9% of the theoretical value(990 mAh·g^(-1)).The reversible capacity after 200 cycles is 96.1% of the first cycle reversible capacity,i.e.,the capacity fade rate is only 0.0195% per cycle,which is even better than that of commercial graphite-based anodes. | Z. W.Zhao Z.P.Guo P. Yao H.K.Liu | 2008 | Journal of Materials Science & Technology2008，24，4： | 0 |
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