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Jiyun Zheng

Bio: Jiyun Zheng is an academic researcher from Tsinghua University. The author has contributed to research in topics: Surface modification & Wetting. The author has an hindex of 2, co-authored 2 publications receiving 31 citations.

Papers
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Journal ArticleDOI
TL;DR: Microstructure evolution of 15'wt% boron carbide particle reinforced aluminum matrix composites (B4C/Al composites) with titanium addition during liquid-stirring process was dynamically characteriz...
Abstract: Microstructure evolution of 15 wt% boron carbide particle reinforced aluminum matrix composites (B4C/Al composites) with titanium addition during liquid-stirring process was dynamically characteriz...

32 citations

Journal ArticleDOI
Jiyun Zheng1, Guogang Shu, Wei Wang1, Qiulin Li1, Wei Liu1 
TL;DR: Wang et al. as discussed by the authors investigated the effect of surface activation and surface roughening on electroless coating of boron carbide (B 4 C) particles and found that the surface morphology was characterized by scanning electron microscope (SEM) and the phase identification was determined by X-ray diffraction (XRD) analysis.

6 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a review of recent progress on electroless copper deposition, primarily on nonconducting substrate surfaces including glass, polymers and resins for applications in electrical and electronics products and services is presented.

104 citations

Journal ArticleDOI
Kaikai Wang1, Xiaopei Li1, Qiulin Li1, Guogang Shu, Guoyi Tang1 
TL;DR: In this article, the effects of Z values on dynamic softening and associated microstructural evolution during hot deformation were investigated by electron back scattered diffraction technique (EBSD), which indicated that the main softening mechanism of AA6061/B4C composites was dynamic recrystallization (DRX).
Abstract: The flow stress behavior of AA6061/B4C composites has been researched by compression test using Gleeble-3800 thermal simulator, in the temperature ranging from 633-783 K and strain rate ranging from 0.001 to 1 s-1. Typical true stress-true strain curves showed that the peak stress levels decreased with the rising of temperature but increased with the rising of strain rates. The combined effects of temperature and strain rate on deformation were analyzed by constitutive equation which containing the Zener-Hollomon parameter (Z) in hyperbolic sine function. The effects of Z values on dynamic softening and associated microstructural evolution during hot deformation were investigated by electron back scattered diffraction technique (EBSD). It was found that with the decrease of Z values, local strain induced by deformation was released and the grain size of aluminum matrix increased gradually, which indicated that the main softening mechanism of AA6061/B4C composites was dynamic recrystallization (DRX), and the lower the Z value was, the easier the DRX occurred.

51 citations

Journal ArticleDOI
TL;DR: In this paper, the interfacial energies were investigated by first-principles calculations, and the results support the reported grain refinement mechanisms in Al/Si alloys and showed that the two interfaces will both weaken after doping Mg/Si, thus the formation of TiB2 is inhibited.

41 citations

Journal ArticleDOI
TL;DR: In this article, a356/SiC nanocomposites have been fabricated through stir casting process and the effect of SiC nanoparticles on A356 and SiC nanomaterials have been investigated.
Abstract: In the present work, A356/SiC nanocomposites have been fabricated through stir casting process. Mechanical properties, morphology and effect of SiC nanoparticles on A356/SiC nanocomposites have bee...

37 citations

Journal ArticleDOI
TL;DR: In this paper, a novel boron carbide and gadolinium particles reinforced Al neutron shielding composite (1%Gd+15%B4C)/Al was successfully fabricated by vacuum hot pressing method, and its microstructure and tensile properties before and after hot extrusion were studied.

35 citations