Author
Chaoqun Peng
Bio: Chaoqun Peng is an academic researcher from Central South University. The author has contributed to research in topics: Microstructure & Alloy. The author has an hindex of 22, co-authored 122 publications receiving 1625 citations.
Papers
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TL;DR: In this article, the discharge behavior of Mg-Al-Pb and MgAlPb-In alloys in 3.5-wt.% NaCl solution is investigated by electrochemical techniques, and compared with that of pure magnesium.
157 citations
TL;DR: In this paper, the electrochemical discharge behavior of AP65 magnesium alloys under different conditions in 3.5-wt. NaCl solution was investigated by electrochemical techniques and compared with that of pure magnesium and AZ31 magnesium alloy.
112 citations
TL;DR: In this article, the effects of dual layers on the microstructure and thermal conductivities of diamond/Cu composite are investigated, and the results indicate that the tungsten coating exhibits integrated and uniform structure when the diamond is treated with tengsten powder at 900°C for 2h.
Abstract: Diamond/Cu composites with high density and good thermal properties are fabricated by vacuum hot pressing via designing dual layers on the diamond particles. Different types of inner tungsten layers are coated on diamond after annealing with the loose tungsten powder, and the outer copper layer is then deposited using electroless plating. The effects of dual layers on the microstructure and thermal conductivities of diamond/Cu composite are investigated. The results indicate that the tungsten coating exhibits integrated and uniform structure when the diamond is treated with tungsten powder at 900 °C for 2 h. This tungsten coating improves the interfacial bonding and minimizes the thermal boundary resistance between the diamond and the copper matrix. Moreover, the outside copper coating promotes the sintering process, and hence favors the low-temperature densification of diamond/Cu composites. The thermal conductivity of diamond/Cu composites reaches 721 W m − 1 K − 1 , which is close to the theoretical value.
87 citations
TL;DR: In this paper, the authors used microstructure characterization to demonstrate that hot extrusion refines the grains of the alloy and leads to the formation of banded structures composed of the lamellar β-Al11La3 and lump Al Mn phases.
74 citations
TL;DR: In this article, the thermal boundary resistance at the interface of Al and Si is calculated, and the average CTE and thermal conductivity of the Al-Si alloys are 18.7-11.3-10−6/K and 184-145 W/m K, respectively.
66 citations
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TL;DR: In this article, the fundamental design principles of highly thermally conductive composites were discussed and the key factors influencing the thermal conductivity of polymers, such as chain structure, crystallinity, crystal form, orientation of polymer chains, and orientation of ordered domains in both thermoplastics and thermosets were addressed.
1,359 citations
16 Mar 1993
TL;DR: Giant and isotropic magnetoresistance as huge as −53% was observed in magnetic manganese oxide La0.72Ca0.25MnOz films with an intrinsic antiferromagnetic spin structure as discussed by the authors.
Abstract: Giant and isotropic magnetoresistance as huge as −53% was observed in magnetic manganese oxide La0.72Ca0.25MnOz films with an intrinsic antiferromagnetic spin structure. We ascribe this magnetoresistance to spin‐dependent electron scattering due to spin canting of the manganese oxide.
924 citations
TL;DR: In 2018 and 2019, significant progress has been achieved in high-performance cast and wrought magnesium and magnesium alloys, such as Mg ion batteries, hydrogen storage Mg materials, bio-magnesium alloys and functional magnesium materials as discussed by the authors.
744 citations
TL;DR: The uses of 4D bioprinting in tissue engineering and drug delivery, and the major roadblocks to this approach are discussed, together with possible solutions, to provide future perspectives on this technology.
476 citations
TL;DR: In this paper, the influence of alloying on the corrosion of Mg-alloys is reviewed, with particular emphasis on the underlying electrochemical kinetics that dictate the ultimate corrosion rate.
Abstract: The demand for light-weighting in transport and consumer electronics has seen rapid growth in the commercial usage of magnesium (Mg). The major use of Mg is now in cast Mg products, as opposed to the use of Mg as an alloying element in other alloy systems and there is an emerging market of wrought Mg products and biomedical Mg components – such that the past two decades have seen a significant number of new Mg-alloys reported. None-the-less, the corrosion of Mg alloys continues to be a challenge facing engineers seeking weight reductions by deployment of Mg. Herein, authors review the influence of alloying on the corrosion of Mg-alloys, with particular emphasis on the underlying electrochemical kinetics that dictate the ultimate corrosion rate. Such a review focusing on the chemistry–corrosion link, both in depth and in a holistic approach, is lacking. As such the authors do not describe aspects such as high-temperature oxidation or cracking, but focus on delivering the state-of-the-art with regar...
358 citations