The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Chunlei Zhao - One of the best experts on this subject based on the ideXlab platform.
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structure and tribocorrosion behavior of ti tin multilayer coatings in simulated body fluid by arc ion plating
Surface & Coatings Technology, 2020Co-Authors: Chunlei Zhao, Yebiao Zhu, Zhiwei YuanAbstract:Abstract The TiN coating and Ti/TiN multilayer coatings were successfully fabricated on Ti6Al4V alloy by multi-arc ion plating. The Ti/TiN multilayer coatings with a total thickness of 4.6 μm and the TiN coating were prepared with a thickness of 5.6 μm. The XRD results indicate that the TiN phase of Ti/TiN multilayer coatings has a face-centered Cubic Crystal with the strong preferred orientation of (111) while the TiN coating has the face-centered Cubic Crystal structure with a preferred orientation of (200). For TiN coating, the hardness is (27.5 ± 1.9) GPa, the load-bearing capacity is (19.0 ± 3.6) N. For Ti/TiN multilayer coating, the hardness is (26.8 ± 1.7) GPa and the load-bearing capacity is (60.4 ± 4.0) N. The Ti/TiN multilayer coatings have excellent tribocorrosion resistance and lower coefficient of friction in simulated body fluid at 37 °C, compared with Ti6Al4V alloy and TiN coating, the tribocorrosion resistance of the multilayer coatings increased by approximately 58 and two times, respectively. The material loss which arises from tribocorrosion is not simply the summation of pure corrosion and pure wear loss, the synergism between corrosion and wear takes a large proportion of the total volume loss.
Zhiwei Yuan - One of the best experts on this subject based on the ideXlab platform.
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structure and tribocorrosion behavior of ti tin multilayer coatings in simulated body fluid by arc ion plating
Surface & Coatings Technology, 2020Co-Authors: Chunlei Zhao, Yebiao Zhu, Zhiwei YuanAbstract:Abstract The TiN coating and Ti/TiN multilayer coatings were successfully fabricated on Ti6Al4V alloy by multi-arc ion plating. The Ti/TiN multilayer coatings with a total thickness of 4.6 μm and the TiN coating were prepared with a thickness of 5.6 μm. The XRD results indicate that the TiN phase of Ti/TiN multilayer coatings has a face-centered Cubic Crystal with the strong preferred orientation of (111) while the TiN coating has the face-centered Cubic Crystal structure with a preferred orientation of (200). For TiN coating, the hardness is (27.5 ± 1.9) GPa, the load-bearing capacity is (19.0 ± 3.6) N. For Ti/TiN multilayer coating, the hardness is (26.8 ± 1.7) GPa and the load-bearing capacity is (60.4 ± 4.0) N. The Ti/TiN multilayer coatings have excellent tribocorrosion resistance and lower coefficient of friction in simulated body fluid at 37 °C, compared with Ti6Al4V alloy and TiN coating, the tribocorrosion resistance of the multilayer coatings increased by approximately 58 and two times, respectively. The material loss which arises from tribocorrosion is not simply the summation of pure corrosion and pure wear loss, the synergism between corrosion and wear takes a large proportion of the total volume loss.
S Shamoto - One of the best experts on this subject based on the ideXlab platform.
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magnetovolume effect in mn3cu1 xgexn related to the magnetic structure neutron powder diffraction measurements
Physical Review B, 2008Co-Authors: Satoshi Iikubo, Katsuaki Kodama, K. Takenaka, S ShamotoAbstract:Magnetic structures in an antiperovskite system, ${\mathrm{Mn}}_{3}{\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Ge}}_{x}\mathrm{N}$, with a large magnetovolume effect above $x=0.15$ have been studied by neutron powder diffraction measurement. The present neutron study revealed that not only a Cubic Crystal structure but also a ${\ensuremath{\Gamma}}^{5g}$ antiferromagnetic spin structure are key ingredients of the large magnetovolume effect in this itinerant electron system. The large magnetovolume effect is possibly ascribed to the geometrical frustration originating from the corner-shared octahedra of the antiperovskite structure.
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magnetovolume effect in mn 3 cu 1 x ge x n related to the magnetic structure neutron powder diffraction measurements
Physical Review B, 2008Co-Authors: Satoshi Iikubo, Katsuaki Kodama, Koshi Takenaka, H Takagi, S ShamotoAbstract:Magnetic structures in an antiperovskite system, ${\mathrm{Mn}}_{3}{\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Ge}}_{x}\mathrm{N}$, with a large magnetovolume effect above $x=0.15$ have been studied by neutron powder diffraction measurement. The present neutron study revealed that not only a Cubic Crystal structure but also a ${\ensuremath{\Gamma}}^{5g}$ antiferromagnetic spin structure are key ingredients of the large magnetovolume effect in this itinerant electron system. The large magnetovolume effect is possibly ascribed to the geometrical frustration originating from the corner-shared octahedra of the antiperovskite structure.
Jorn W F Venderbos - One of the best experts on this subject based on the ideXlab platform.
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multi q hexagonal spin density waves and dynamically generated spin orbit coupling time reversal invariant analog of the chiral spin density wave
Physical Review B, 2016Co-Authors: Jorn W F VenderbosAbstract:We study hexagonal spin-channel (``triplet'') density waves with commensurate $M$-point propagation vectors. We first show that the three $Q=M$ components of the singlet charge density and charge-current density waves can be mapped to multicomponent $Q=0$ nonzero angular momentum order in three dimensions ($\text{3D}$) with Cubic Crystal symmetry. This one-to-one correspondence is exploited to define a symmetry classification for triplet $M$-point density waves using the standard classification of spin-orbit coupled electronic liquid Crystal phases of a Cubic Crystal. Through this classification we naturally identify a set of noncoplanar spin density and spin-current density waves: the chiral spin density wave and its time-reversal invariant analog. These can be thought of as $3\text{D}\phantom{\rule{4pt}{0ex}}L=2$ and 4 spin-orbit coupled isotropic $\ensuremath{\beta}$-phase orders. In contrast, uniaxial spin density waves are shown to correspond to $\ensuremath{\alpha}$ phases. The noncoplanar triple-$M$ spin-current density wave realizes a novel $2\text{D}$ semimetal state with three flavors of four-component spin-momentum locked Dirac cones, protected by a Crystal symmetry akin to nonsymmorphic symmetry, and sits at the boundary between a trivial and topological insulator. In addition, we point out that a special class of classical spin states, defined as classical spin states respecting all lattice symmetries up to global spin rotation, are naturally obtained from the symmetry classification of electronic triplet density waves. These symmetric classical spin states are the classical long-range ordered limits of chiral spin liquids.
Yebiao Zhu - One of the best experts on this subject based on the ideXlab platform.
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structure and tribocorrosion behavior of ti tin multilayer coatings in simulated body fluid by arc ion plating
Surface & Coatings Technology, 2020Co-Authors: Chunlei Zhao, Yebiao Zhu, Zhiwei YuanAbstract:Abstract The TiN coating and Ti/TiN multilayer coatings were successfully fabricated on Ti6Al4V alloy by multi-arc ion plating. The Ti/TiN multilayer coatings with a total thickness of 4.6 μm and the TiN coating were prepared with a thickness of 5.6 μm. The XRD results indicate that the TiN phase of Ti/TiN multilayer coatings has a face-centered Cubic Crystal with the strong preferred orientation of (111) while the TiN coating has the face-centered Cubic Crystal structure with a preferred orientation of (200). For TiN coating, the hardness is (27.5 ± 1.9) GPa, the load-bearing capacity is (19.0 ± 3.6) N. For Ti/TiN multilayer coating, the hardness is (26.8 ± 1.7) GPa and the load-bearing capacity is (60.4 ± 4.0) N. The Ti/TiN multilayer coatings have excellent tribocorrosion resistance and lower coefficient of friction in simulated body fluid at 37 °C, compared with Ti6Al4V alloy and TiN coating, the tribocorrosion resistance of the multilayer coatings increased by approximately 58 and two times, respectively. The material loss which arises from tribocorrosion is not simply the summation of pure corrosion and pure wear loss, the synergism between corrosion and wear takes a large proportion of the total volume loss.