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| 1 | Microstructure e- volution of copper doped beryllium thin films显示文摘 | Zhou Minjie Luo Bingchi Li Kai | 2012 | Trans Nonferrous Metals Soc China2012，22，5： | 1 |
| 2 | Specific heat and related thermophysical properties of liquid Fe-Cu-Mo alloy显示文摘The specific heat and related thermophysical properties of liquid Fe77.5Cu13Mo9.5 monotectic alloy were investigated by an electromagnetic levitation drop calo-rimeter over a wide temperature range from 1482 to 1818 K.A maximum under-cooling of 221 K(0.13 Tm)was achieved and the specific heat was determined as 44.71 J·mol1·K1.The excess specific heat,enthalpy change,entropy change and Gibbs free energy difference of this alloy were calculated on the basis of experimental results.It was found that the calculated results by traditional esti-mating methods can only describe the solidification process under low under-cooling conditions.Only the experimental results can reflect the reality under high undercooling conditions.Meanwhile,the thermal diffusivity,thermal conductivity,and sound speed were derived from the present experimental results.Furthermore,the solidified microstructural morphology was examined,which consists of(Fe)and(Cu)phases.The calculated interface energy was applied to exploring the correlation between competitive nucleation and solidification microstructure within monotectic alloy. | WANG HaiPeng LUO BingChi CHANG Jian WEI BingBo | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，4： | 0 |
| 3 | Phase field simulation of monotectic transformation for liquid Ni-Cu-Pb alloys显示文摘Based on the subregular solution model, the liquid phase separation of ternary (NixCu100-x)50Pb50 monotectic alloys is simulated by the phase field method. It is found that if the surface segregation potential is not incorporated, the dynamic morphologies of alloy melt show a transition from disperse microstructure into bicontinuous microstructure with the increase of fluidity parameter. When the surface segregation potential is coupled, Pb-rich phase migrates preferentially to the surface of the liquid alloy, and the Ni-rich phase depends on the Pb-rich phase to nucleate. With the extension of the phase separation time, the surface layer is formed through coagulation and growth, and its thickness gradually increases. The Ni-rich phase migrates to the central part, and finally a two-layer core-shell microstructure is produced. The concentration in the surface layer fluctuates more conspicuously than that inside the bulk phase, which subsequently transfers from the surface to the interior by a wave. The fluid field near the liquid-liquid interface is strong at the beginning of phase separation, and reduces later on. The surface segregation is essential to the formation of the surface layer, concentration profile variation, fluid field distribution and phase separation morphology. | LUO BingChi WANG HaiPeng WEI BingBo | 2009 | Chinese Science Bulletin2009，54，2： | 0 |
| 4 | An investigation progress toward Be-based ablator materials for the inertial confinement fusion显示文摘The Be-based materials with many particular properties lead to an important research subject. The investigation progresses in the fabrication technologies are introduced here, including main three kinds of Be-based materials, such as Be–Cu capsule, Be_2C ablator and high-purity Be material. Compared with the pioneer workgroup on Be-based materials,the differences in Be–Cu target fabrication were described, and a grain refinement technique by an active hydrogen reaction for Be coating was proposed uniquely. Be_2C coatings were first prepared by the DC reactive magnetron sputtering with a high deposition rate(~300 nm/h). Pure polycrystalline Be_2C films with uniform microstructures,smooth surface, high density(~2.2 g · cm^3) and good optical transparency were fabricated. In addition, the high-purity Be materials with metal impurities in a ppm magnitude were fabricated by the pyrolysis of organometallic Be. | Bingchi Luo Jiqiang Zhang Yudan He Long Chen Jiangshan Luo Kai Li Weidong Wu | 2017 | High Power Laser Science and Engineering2017，5，2： | 0 |
| 5 | Thickness dependence of microstructure and properties in Be2C coatings as a promising ablation material显示文摘Beryllium carbide(Be2C)thin films have proven to be promising ablation materials,but the properties of Be2C coatings of the greater thickness required for inertial confinement fusion capsules are still unknown.In this work,Be2Ccoatings of various thicknesses(0.3–32.9μm)are prepared byDC reactive magnetron sputtering.The influence of thickness on crystal properties,microstructure,and optical properties is investigated.The results indicate that the crystallinity of polycrystalline Be2C films improves with increasing thickness,while the grain size(∼5 nm)and texture properties(without a preferred orientation)have only a weak dependence on thickness.Auniform featureless microstructure and smooth surface(root mean square roughness∼8 nm)are observed even in thick(32.9μm)films,despite the presence of defects induced by contaminants.High densities(2.19–2.31 g/cm3)and high deposition rates(∼270 nm/h)are realized,with the latter corresponding to the upper limit for the fabrication of Be2Ccoatings by magnetron sputtering.The transmittance of the films in the near-infrared region remains at a high level(>80%)and has only a weak dependence on thickness,while the transmittance in the visible region decreases with increasing thickness.In addition,the optical bandgap is estimated to be about 1.9 eV and decreases with increasing thickness owing to the presence of defects. | Yudan He Lei Jin Jiqiang Zhang Bingchi Luo Kai Li Weidong Wu Jiangshan Luo | 2019 | Matter and Radiation at Extremes2019，4，4： | 0 |
| 6 | Influence of the Source to Substrate Distance on the Growth,Tribological Properties and Optical Properties of Be Films显示文摘The Be films were prepared by thermal evaporation at different sources to substrate distances(SSD) on glass substrates. The decrease of SSD from 90 mm to 50 mm caused the increase of substrate temperature and the rising density of incident Be atoms, thus the properties of Be films greatly changed accordingly. The experimental results showed that the grain diameter in the Be films transited from below 100 nm to 300 nm, the film growth rate increased from 2.35 nm/min to 4.73 nm/min and the roughness increased from 7 nm to 49 nm. The performance study suggested that the friction coefficient of Be films increased from 0.13 to 0.27 and was related to the surface roughness and inner structure, the near-infrared reflectance of Be films increased from 40% to 85% with the increase of wavelength and concurrently decreased with the decrease of SSD, respectively. The performance study indicated that the Be film had the potential application in specific near-infrared reflectance optical system. | 李恺 LUO Bingchi HE Yudan LI Wenqi 罗江山 | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，2： | 0 |
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