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学者姓名:任晓兵

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Preface Scopus
期刊论文 | 2018 , 275 , v-vii | Springer Series in Materials Science
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GB/T 7714 Lookman, Turab , Ren, Xiaobing . Preface [J]. | Springer Series in Materials Science , 2018 , 275 : v-vii .
MLA Lookman, Turab 等. "Preface" . | Springer Series in Materials Science 275 (2018) : v-vii .
APA Lookman, Turab , Ren, Xiaobing . Preface . | Springer Series in Materials Science , 2018 , 275 , v-vii .
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Amorphous martensite in beta-Ti alloys SCIE PubMed Scopus
期刊论文 | 2018 , 9 | NATURE COMMUNICATIONS
SCOPUS Cited Count: 1
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Martensitic transformations originate from a rigidity instability, which causes a crystal to change its lattice in a displacive manner. Here, we report that the martensitic transformation on cooling in Ti-Zr-Cu-Fe alloys yields an amorphous phase instead. Metastable beta-Ti partially transforms into an intragranular amorphous phase due to local lattice shear and distortion. The lenticular amorphous plates, which very much resemble alpha'/alpha ''. martensite in conventional Ti alloys, have a well-defined orientation relationship with the surrounding beta-Ti crystal. The present solid-state amorphization process is reversible, largely cooling rate independent and constitutes a rare case of congruent inverse melting. The observed combination of elastic softening and local lattice shear, thus, is the unifying mechanism underlying both martensitic transformations and catastrophic (inverse) melting. Not only do we reveal an alternative mechanism for solid-state amorphization but also establish an explicit experimental link between martensitic transformations and catastrophic melting.

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GB/T 7714 Zhang, Long , Zhang, Haifeng , Ren, Xiaobing et al. Amorphous martensite in beta-Ti alloys [J]. | NATURE COMMUNICATIONS , 2018 , 9 .
MLA Zhang, Long et al. "Amorphous martensite in beta-Ti alloys" . | NATURE COMMUNICATIONS 9 (2018) .
APA Zhang, Long , Zhang, Haifeng , Ren, Xiaobing , Eckert, Juergen , Wang, Yandong , Zhu, Zhengwang et al. Amorphous martensite in beta-Ti alloys . | NATURE COMMUNICATIONS , 2018 , 9 .
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Highly thermal-stable ferromagnetism by a natural composite SCIE PubMed Scopus
期刊论文 | 2017 , 8 | NATURE COMMUNICATIONS | IF: 12.353
WoS CC Cited Count: 19 SCOPUS Cited Count: 20
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All ferromagnetic materials show deterioration of magnetism-related properties such as magnetization and magnetostriction with increasing temperature, as the result of gradual loss of magnetic order with approaching Curie temperature T-C. However, technologically, it is highly desired to find a magnetic material that can resist such magnetism deterioration and maintain stable magnetism up to its T-C, but this seems against the conventional wisdom about ferromagnetism. Here we show that a Fe-Ga alloy exhibits highly thermal-stable magnetization up to the vicinity of its T-C, 880 K. Also, the magnetostriction shows nearly no deterioration over a very wide temperature range. Such unusual behaviour stems from dual-magnetic-phase nature of this alloy, in which a gradual structural-magnetic transformation occurs between two magnetic phases so that the magnetism deterioration is compensated by the growth of the ferromagnetic phase with larger magnetization. Our finding may help to develop highly thermal-stable ferromagnetic and magnetostrictive materials.

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GB/T 7714 Ma, Tianyu , Gou, Junming , Hu, Shanshan et al. Highly thermal-stable ferromagnetism by a natural composite [J]. | NATURE COMMUNICATIONS , 2017 , 8 .
MLA Ma, Tianyu et al. "Highly thermal-stable ferromagnetism by a natural composite" . | NATURE COMMUNICATIONS 8 (2017) .
APA Ma, Tianyu , Gou, Junming , Hu, Shanshan , Liu, Xiaolian , Wu, Chen , Ren, Shuai et al. Highly thermal-stable ferromagnetism by a natural composite . | NATURE COMMUNICATIONS , 2017 , 8 .
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Enhancing dielectric permittivity for energy-storage devices through tricritical phenomenon SCIE PubMed Scopus
期刊论文 | 2017 , 7 | SCIENTIFIC REPORTS | IF: 4.122
WoS CC Cited Count: 19 SCOPUS Cited Count: 27
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Although dielectric energy-storing devices are frequently used in high voltage level, the fast growing on the portable and wearable electronics have been increasing the demand on the energy-storing devices at finite electric field strength. This paper proposes an approach on enhancing energy density under low electric field through compositionally inducing tricriticality in Ba(Ti, Sn)O-3 ferroelectric material system with enlarged dielectric response. The optimal dielectric permittivity at tricritical point can reach to epsilon(r) = 5.4 x 10(4), and the associated energy density goes to around 30 mJ/cm(3) at the electric field of 10 kV/cm, which exceeds most of the selected ferroelectric materials at the same field strength. The microstructure nature for such a tricritical behavior shows polarization inhomogeneity in nanometeric scale, which indicates a large polarizability under external electric field. Further phenomenological Landau modeling suggests that large dielectric permittivity and energy density can be ascribed to the vanishing of energy barrier for polarization altering caused by tricriticality. Our results may shed light on developing energy-storing dielectrics with large permittivity and energy density at low electric field.

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GB/T 7714 Gao, Jinghui , Wang, Yan , Liu, Yongbin et al. Enhancing dielectric permittivity for energy-storage devices through tricritical phenomenon [J]. | SCIENTIFIC REPORTS , 2017 , 7 .
MLA Gao, Jinghui et al. "Enhancing dielectric permittivity for energy-storage devices through tricritical phenomenon" . | SCIENTIFIC REPORTS 7 (2017) .
APA Gao, Jinghui , Wang, Yan , Liu, Yongbin , Hu, Xinghao , Ke, Xiaoqin , Zhong, Lisheng et al. Enhancing dielectric permittivity for energy-storage devices through tricritical phenomenon . | SCIENTIFIC REPORTS , 2017 , 7 .
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High damping capacity of a Ni-Cu-Mn-Ga alloy in wide ambient-temperature range EI SCIE Scopus
期刊论文 | 2017 , 695 , 2400-2405 | JOURNAL OF ALLOYS AND COMPOUNDS | IF: 3.779
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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The damping capacity of Ni55-xCuxMn25Ga20 (x = 0, 2, 4, 6) shape memory alloys is studied in details. The results show an increasing damping peak capacity with increasing Cu content. Especially, a high damping peak with the peak value of 0.08 is found in Ni49Cu6Mn25Ga20 alloy, which spans over a wide temperature range of 173 K-425 K. The first-principles calculations indicate the substitution of Cu for Ni weakens the p-d orbital hybridization of Ni55-xCuxMn25Ga20 and reduces its martensite modulus, which thus enhances its twin boundary mobility and the damping capability. Our study sheds light on developing ambient-temperature high damping alloys. (C) 2016 Elsevier B.V. All rights reserved.

Keyword :

Martensitic phase transformation Dynamic mechanical analysis Ferromagnetic shape memory alloy Magnetic properties Damping

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GB/T 7714 Liao, Xiaoqi , Wang, Yu , Fan, Genlian et al. High damping capacity of a Ni-Cu-Mn-Ga alloy in wide ambient-temperature range [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2017 , 695 : 2400-2405 .
MLA Liao, Xiaoqi et al. "High damping capacity of a Ni-Cu-Mn-Ga alloy in wide ambient-temperature range" . | JOURNAL OF ALLOYS AND COMPOUNDS 695 (2017) : 2400-2405 .
APA Liao, Xiaoqi , Wang, Yu , Fan, Genlian , Liu, Enke , Shang, Jiaruo , Yang, Sen et al. High damping capacity of a Ni-Cu-Mn-Ga alloy in wide ambient-temperature range . | JOURNAL OF ALLOYS AND COMPOUNDS , 2017 , 695 , 2400-2405 .
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Phase diagram of FeNiCoAlTaB ferrous shape memory alloy on aging time EI SCIE Scopus
期刊论文 | 2017 , 7 (4) | AIP ADVANCES | IF: 1.653
SCOPUS Cited Count: 1
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Ferrous shape memory alloy, Fe41Ni28Co17Al11.5Ta2.5B0.05, has shown large superelastic strain and strength in previous study. In the fabrication of this alloy, aging process is crucial for the formation of shape memory effect/superelasticity. However, its phase evolution on aging time is not clearly known. In this study, we systematically studied the phase diagram of this alloy on aging time. It is found that the unaged alloy shows a strain glass transition. With the aging time proceeding, the martensitic transformation gradually emerges. The phase diagram can be explained by the formation of coherent precipitates induced by aging. The heterogeneous strain between coherent precipitates and matrix is the driving force responsible for the emerging martensitic transformation. The generic explanation is supposed to be useful in martensitic transformation engineering for developing novel shape memory alloys from non-transforming materials. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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GB/T 7714 Zhou, Zhijian , Cui, Jian , Ren, Xiaobing . Phase diagram of FeNiCoAlTaB ferrous shape memory alloy on aging time [J]. | AIP ADVANCES , 2017 , 7 (4) .
MLA Zhou, Zhijian et al. "Phase diagram of FeNiCoAlTaB ferrous shape memory alloy on aging time" . | AIP ADVANCES 7 . 4 (2017) .
APA Zhou, Zhijian , Cui, Jian , Ren, Xiaobing . Phase diagram of FeNiCoAlTaB ferrous shape memory alloy on aging time . | AIP ADVANCES , 2017 , 7 (4) .
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Electrostrain enhancement at an invisible boundary in a single ferroelectric phase SCIE Scopus
期刊论文 | 2017 , 95 (2) | PHYSICAL REVIEW B | IF: 3.813
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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In ferroelectric materials the maximum electrostrain effect usually occurs at a phase boundary (often referred to as a "morphotropic phase boundary") between two or more different phases due to lattice instability at such compositions. As a result it is not expected that the electrostrain maximum can appear in a single ferroelectric phase regime which is away from lattice instability. In this Rapid Communication we report an unexpected finding that the electrostrain maximum occurs in a single rhombohedral phase region of the (1 x%)Ba(Ti0.8Hf0.2)O-3-x%(Ba0.7Ca0.3)TiO3 system. The composition showing the maximum electrostrain corresponds to an "invisible boundary" within the single ferroelectric phase, which is a vertical line starting from the quadruple point of the system. At the invisible boundary other anomalies, such as maximum spontaneous polarization also appear. The origin of electrostrain enhancement at the invisible boundary is considered to correlate with an easy polarization extension inherited from the quadruple point. The electrostrain enhancement effect at the invisible boundary has the advantage of having better temperature stability as compared with that at a phase boundary and thus may provide a way for designing high-electrostrain materials with improved temperature stability.

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GB/T 7714 Zhao, Luo , Ke, Xiaoqin , Wang, Weichen et al. Electrostrain enhancement at an invisible boundary in a single ferroelectric phase [J]. | PHYSICAL REVIEW B , 2017 , 95 (2) .
MLA Zhao, Luo et al. "Electrostrain enhancement at an invisible boundary in a single ferroelectric phase" . | PHYSICAL REVIEW B 95 . 2 (2017) .
APA Zhao, Luo , Ke, Xiaoqin , Wang, Weichen , Zhang, Le , Zhou, Chao , Zhou, Zhijian et al. Electrostrain enhancement at an invisible boundary in a single ferroelectric phase . | PHYSICAL REVIEW B , 2017 , 95 (2) .
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Ferroelectric Domain Walls Approaching Morphotropic Phase Boundary EI SCIE Scopus
期刊论文 | 2017 , 121 (4) , 2243-2250 | JOURNAL OF PHYSICAL CHEMISTRY C | IF: 4.484
WoS CC Cited Count: 7 SCOPUS Cited Count: 9
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Domain walls play an important role in tailoring the properties of ferroic materials. We employ a Landau-Ginzburg thermodynamic model to investigate the ferroelectric domain walls around the morphotropic phase boundary (MPB) which contribute to the large piezoelectric response, including 90 degrees domain wall for tetragonal (T) symmetry and 109 degrees and 71 degrees domain walls for rhombohedral (R) symmetry. The domain wall energy for each type of domain wall has been analytically calculated by quasi-one-dimensional solution of the spatial evolution for polarization. Our results suggest that the domain wall energies for both T-T and R-R domains decrease as the composition approaches MPB accompanied by the vanishing of polarization anisotropy, which can be-viewed as the origin for the experimentally observed miniaturized domains. In addition, the reduced domain wall energy caused by the polarization anisotropy vanishing is responsible for the large piezoelectric response due to the displacement of domain walls.

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GB/T 7714 Gao, Jinghui , Hu, Xinghao , Liu, Yongbin et al. Ferroelectric Domain Walls Approaching Morphotropic Phase Boundary [J]. | JOURNAL OF PHYSICAL CHEMISTRY C , 2017 , 121 (4) : 2243-2250 .
MLA Gao, Jinghui et al. "Ferroelectric Domain Walls Approaching Morphotropic Phase Boundary" . | JOURNAL OF PHYSICAL CHEMISTRY C 121 . 4 (2017) : 2243-2250 .
APA Gao, Jinghui , Hu, Xinghao , Liu, Yongbin , Wang, Yan , Ke, Xiaoqin , Wang, Dong et al. Ferroelectric Domain Walls Approaching Morphotropic Phase Boundary . | JOURNAL OF PHYSICAL CHEMISTRY C , 2017 , 121 (4) , 2243-2250 .
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High temperature-stability of (Pb0.9La0.1)(Zr0.65Ti0.35)O-3 ceramic for energy-storage applications at finite electric field strength EI SCIE Scopus
期刊论文 | 2017 , 137 , 114-118 | SCRIPTA MATERIALIA | IF: 4.163
WoS CC Cited Count: 5 SCOPUS Cited Count: 6
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Temperature stability is one of the key factors for energy storage application of dielectric capacitors especially under stringent environmental conditions. In this work, we report that the (Pb0.9La0.1)(Zr0.65Ti0.35)O-3 ceramic exhibits small variation of energy density (<15%) over a wide temperature range (24 degrees C similar to 83 degrees C) at low field strength (E < 25 kV/cm). Further TEM observation and phase field simulations suggest that it can be attributed to continuous formation and growth of polar nanoregions with temperature and electric field, resulting in high-temperature stability for dielectric permittivity and energy density. Our finding may have implications for developing dielectric energy-storing devices with high thermal reliability. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Keyword :

Ferroelectric ceramics Energy storage Dielectrics Phase transformations Ferroelectric domains

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GB/T 7714 Gao, Jinghui , Liu, Yongbin , Wang, Yan et al. High temperature-stability of (Pb0.9La0.1)(Zr0.65Ti0.35)O-3 ceramic for energy-storage applications at finite electric field strength [J]. | SCRIPTA MATERIALIA , 2017 , 137 : 114-118 .
MLA Gao, Jinghui et al. "High temperature-stability of (Pb0.9La0.1)(Zr0.65Ti0.35)O-3 ceramic for energy-storage applications at finite electric field strength" . | SCRIPTA MATERIALIA 137 (2017) : 114-118 .
APA Gao, Jinghui , Liu, Yongbin , Wang, Yan , Wang, Dong , Zhong, Lisheng , Ren, Xiaobing . High temperature-stability of (Pb0.9La0.1)(Zr0.65Ti0.35)O-3 ceramic for energy-storage applications at finite electric field strength . | SCRIPTA MATERIALIA , 2017 , 137 , 114-118 .
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Super-strong dislocation-structured high-carbon martensite steel SCIE PubMed Scopus
期刊论文 | 2017 , 7 | SCIENTIFIC REPORTS | IF: 4.122
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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High-carbon martensite steels (with C > 0.5 wt.%) are very hard but at the same time as brittle as glass in as-quenched or low-temperature-tempered state. Such extreme brittleness, originating from a twin microstructure, has rendered these steels almost useless in martensite state. Therefore, for more than a century it has been a common knowledge that high-carbon martensitic steels are intrinsically brittle and thus are not expected to find any application in harsh loading conditions. Here we report that these brittle steels can be transformed into super-strong ones exhibiting a combination of ultrahigh strength and significant toughness, through a simple grain-refinement treatment, which refines the grain size to similar to 4 mu m. As a result, an ultra-high tensile strength of 2.4 similar to 2.6 GPa, a significant elongation of 4 similar to 10% and a good fracture toughness (K-1C) of 23.5 similar to 29.6 MPa m(1/2) were obtained in high-carbon martensitic steels with 0.61-0.65 wt.% C. These properties are comparable with those of "the king of super-high-strength steels"-maraging steels, but achieved at merely 1/30 similar to 1/50 of the price. The drastic enhancement in mechanical properties is found to arise from a transition from the conventional twin microstructure to a dislocation one by grain refinement. Our finding may provide a new route to manufacturing super-strong steels in a simple and economic way.

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GB/T 7714 Sun, Jun-jie , Liu, Yong-ning , Zhu, Yun-tian et al. Super-strong dislocation-structured high-carbon martensite steel [J]. | SCIENTIFIC REPORTS , 2017 , 7 .
MLA Sun, Jun-jie et al. "Super-strong dislocation-structured high-carbon martensite steel" . | SCIENTIFIC REPORTS 7 (2017) .
APA Sun, Jun-jie , Liu, Yong-ning , Zhu, Yun-tian , Lian, Fu-liang , Liu, Hong-ji , Jiang, Tao et al. Super-strong dislocation-structured high-carbon martensite steel . | SCIENTIFIC REPORTS , 2017 , 7 .
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