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Lyu, Jike
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Publications (8/8 displayed)
- 2024Cobalt-free layered perovskites RBaCuFeO 5+ δ (R = 4f lanthanide) as electrocatalysts for the oxygen evolution reactioncitations
- 2023Catalyst Aggregate Size Effect on the Mass Transport Properties of Non-Noble Metal Catalyst Layers for PEMFC Cathodescitations
- 2023Multiple unconventional charge density wave transitions in LaPt$_2$Si$_2$ superconductor clarified with high-energy X-ray diffractioncitations
- 2019Growth Window of Ferroelectric Epitaxial Hf0.5Zr0.5O2 Thin Films
- 2018Control of Polar Orientation and Lattice Strain in Epitaxial BaTiO3 Films on Silicon
- 2017High-Current Pulsed Electron Treatment of Hypoeutectic Al–10Si Alloycitations
- 2016Microstructure Analysis of HPb59-1 Brass Induced by High Current Pulsed Electron Beamcitations
- 2015Halo Evolution of Hypereutectic Al-17.5Si Alloy Treated with High-Current Pulsed Electron Beamcitations
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article
Halo Evolution of Hypereutectic Al-17.5Si Alloy Treated with High-Current Pulsed Electron Beam
Abstract
<jats:p>Halo evolution of an Al-17.5Si alloy surface after treatment with increasing pulse numbers of a high-current pulsed electron beam (HCPEB) was investigated. A halo is a ring microstructure resembling a bull’s eye. SEM results indicate that the nanocrystallization of halo induced by HCPEB treatment leads to gradual diffusion of the Si phase. Multiple pulses numbers cause the Si phase to be significantly refined and uniformly distributed. In addition, nanosilicon particles with a grain size of 30~100 nm were formed after HCPEB treatment, as shown by TEM observation. XRD results indicate that Si diffraction peaks broadened after HCPEB treatment. The microhardness tests demonstrate that the microhardness at the midpoint from the halo edge to center decreased sharply from 9770.7 MPa at 5 pulses to 2664.14 MPa at 25 pulses. The relative wear resistance of a 15-pulse sample is effectively improved by a factor of 6.5, exhibiting optimal wear resistance.</jats:p>