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H.F. Zhang

Bio: H.F. Zhang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Amorphous metal & Alloy. The author has an hindex of 30, co-authored 216 publications receiving 3849 citations. Previous affiliations of H.F. Zhang include Northeastern University (China) & University of Science and Technology of China.


Papers
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Journal ArticleDOI
TL;DR: It is demonstrated that a series of superconductors with enhanced Tc = 30∼46 K can be obtained by intercalating metals, Li, Na, Ba, Sr, Ca, Yb, and Eu in between FeSe layers by the ammonothermal method at room temperature, providing a new starting point for studying the properties of thesesuperconductors and an effective synthetic route for the exploration of new superconductor exploration.
Abstract: Observation of superconductivity at 30 ∼ 46K in A x Fe 2 Se 2 (A = Li, Na, Ba, Sr, Ca, Yb, and Eu)

282 citations

Journal ArticleDOI
Jia Zhu1, H.M. Fu1, H.F. Zhang1, A.M. Wang1, H. J. Li1, Zushu Hu1 
TL;DR: In this article, the effect of Mo element on the structure and properties of AlCoCrFeNi alloy was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and differential scanning calorimeter (DSC).
Abstract: Multicomponent AlCoCrFeNiMo(x) (x values in molar ratio, x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) alloys were prepared using a well-developed copper mould casting. The effects of Mo element on the structure and properties of AlCoCrFeNi alloy were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC). It was found that Mo addition took significant effects on the structure and properties of AlCoCrFeNi alloy. Mo(0.1) alloy, similar to Mo(0) alloy, was of single BCC solid solution structure. When Mo content was more than 0.1, the alloy exhibited a typical laminar eutectic structure. The alloy strength was improved obviously, but the ductility of alloy was lowered at the same time. The maximum yield strength reached 2757 MPa when Mo content was 0.5, and the maximum compressive fracture strength reached 3208 MPa when Mo content was 0.3. The strengthening effect and mechanism of Mo addition on AlCoCrFeNi alloy were discussed from different aspects. (C) 2010 Elsevier B.V. All rights reserved.

212 citations

Journal ArticleDOI
Jia Zhu1, H.M. Fu1, H.F. Zhang1, A.M. Wang1, H. J. Li1, Zushu Hu1 
TL;DR: In this article, a non-metallic Si element is introduced to AlCoCrFeNiSi(x) alloys and the improvement of mechanical properties is attributed to the solid solution of Si element and precipitation strengthening of nanoscale cellular structure.
Abstract: By introducing nonmetallic Si element, AlCoCrFeNiSi(x) (x values in molar ratio, x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) alloys are designed and prepared. One kind of nanoscale cellular structure forms due to the introduction of nonmetallic Si element. The alloy is composed mainly of BCC solid solution and possesses excellent room-temperature compressive mechanical properties. The excessive introduction of Si element leads to the precipitation of 8 phase at grain boundary. The improvement of mechanical properties is attributed to the solid solution of Si element and precipitation strengthening of nanoscale cellular structure. The precipitated 8 phase at grain boundary should be responsible for transition of alloy from plastic fracture to brittle fracture. Among them, Si(0.4) alloy exhibits excellent comprehensive mechanical properties, yield stress of 1481 MPa, fracture strength of 2444 MPa and plastic strain of 13.38%, respectively. (C) 2010 Elsevier B.V. All rights reserved.

160 citations

Journal ArticleDOI
TL;DR: In this paper, a class of low-cost TiZr-base bulk metallic glasses (BMGs) (Ti(36.1)Zr(33.2)Ni(5.8)Be(24.9))(100-x)Cu(x) (x=5, 7 and 9) with a maximum size of over 50 mm in diameter were developed by optimizing the alloy composition.

133 citations

Journal ArticleDOI
Jia Zhu1, H.F. Zhang1, H.M. Fu1, A.M. Wang1, H. J. Li1, Zushu Hu1 
TL;DR: In this paper, the effects of Mo element on microstructures and properties of multicomponent AlCoCrCuFeNi alloy were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimeter (DSC).

119 citations


Cited by
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Journal ArticleDOI
TL;DR: High entropy alloys (HEAs) are barely 12 years old as discussed by the authors, and the field has stimulated new ideas and inspired the exploration of the vast composition space offered by multi-principal element alloys.

4,693 citations

Journal ArticleDOI
TL;DR: The concept of high entropy introduces a new path of developing advanced materials with unique properties, which cannot be achieved by the conventional micro-alloying approach based on only one dominant element as mentioned in this paper.

4,394 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed the recent development of new alloy systems of bulk metallic glasses and the properties and processing technologies relevant to the industrial applications of these alloys are also discussed.
Abstract: Amorphous alloys were first developed over 40 years ago and found applications as magnetic core or reinforcement added to other materials. The scope of applications is limited due to the small thickness in the region of only tens of microns. The research effort in the past two decades, mainly pioneered by a Japanese- and a US-group of scientists, has substantially relaxed this size constrain. Some bulk metallic glasses can have tensile strength up to 3000 MPa with good corrosion resistance, reasonable toughness, low internal friction and good processability. Bulk metallic glasses are now being used in consumer electronic industries, sporting goods industries, etc. In this paper, the authors reviewed the recent development of new alloy systems of bulk metallic glasses. The properties and processing technologies relevant to the industrial applications of these alloys are also discussed here. The behaviors of bulk metallic glasses under extreme conditions such as high pressure and low temperature are especially addressed in this review. In order that the scope of applications can be broadened, the understanding of the glass-forming criteria is important for the design of new alloy systems and also the processing techniques.

3,089 citations

Journal ArticleDOI
TL;DR: In this paper, a review of recent advances in understanding the mechanical behavior of metallic glasses, with particular emphasis on the deformation and fracture mechanisms, is presented, where the role of glass structure on mechanical properties, and conversely, the effect of deformation upon glass structure, are also described.

2,858 citations

Journal ArticleDOI
TL;DR: In this article, an equiatomic CoCrFeMnNi high-entropy alloy, which crystallizes in the face-centered cubic (fcc) crystal structure, was produced by arc melting and drop casting.

2,181 citations